Metal Stitching & Metal Locking Services for Marine and Power Plants   

Metal Stitching And Metal Locking Services

Metal Stitching, also known as Cold Metal Repair or Metal Locking, is a means to restore broken cast iron, cast steel, or aluminum without welding or heat.
Instead of melting the metal like welding does, this method uses specially designed metal keys and stitching pins (locks) to pull the cracked edges together and seal the fracture permanently.

It’s a common fix in heavy industries like,

  • Marine engine blocks and crankcases
  • Turbine casings and power plants
  • Covers for pumps, compressors, and generators
  • Big machines are used in industry

Why Not Just Weld It?

It sounds straightforward to weld on cast parts, but in reality, it’s not:

  • Heat makes things bend.
  • The metal gets weaker because the way its parts work changes.
  • There may be new cracks around the welded area.
  • Metal stitching doesn’t have any of that because there is no heat.
  • The casting’s original strength stays the same.

How the locks and keys really work

The magic of metal stitching lies in installing metal keys and stitching pins directly into the crack.

How to do metal stitching step by step

Step 1: Stop the Crack from Spreading

  • Small holes are drilled at each end of the crack.
  • This freezes the crack in place.

Step 2: Install Metal Keys (Locks)

  • Slots are carefully machined along the crack.
  • Precision metal keys are inserted into the slots.

What the keys do:

  • Pull both sides of the crack tightly together
  • Distribute stress across the repaired area
  • Restore strength equal to — or even stronger than — the original casting

Step 3: Install Stitching Pins

  • Small holes are drilled which are perpendicular to the crack.
  • To seal the crack, metal stitching pins were screwed.

What the pins do:

  • Hold the area in compression
  • Make the repair pressure-tight (no leaks — oil, gas, or coolant)

Step 4: Finishing

  • The repaired surface is machine-smooth and flush.
  • After finishing, you can barely tell the crack existed.

Why Metal Stitching is a Game Changer

Benefit: What it means

  • No heat involved, no distortion, no internal metal damage
  • Strong reinforcement: Strength equal to or greater than the original casting
  • Leak-proof, Perfect for high-pressure applications
  • Work done on-site. No dismantling, minimal downtime
  • Saves money: 60–80% cheaper than replacing the component

Where We Typically Use It

Metal Stitching And Metal Locking Services uses precision tools, keys, and locks to repair cracks in damaged engine blocks without heat, without distortion, and without messing with the metal’s original strength.

Engine block window after repair
Engine block window after repair

Why R A Power Solutions?

We’re not new to this — we’re experts at this.
With 45+ years of experience and thousands of successful repairs globally, R A Power Solutions repairs:

  • Engine blocks
  • Turbine and pump casings
  • Cylinder liners
  • Compressor housings

For more information , see the metal stitching and metal surgery process, Metal Stitching And Metal Locking Services, crack casting repair, turbine casing crack repair on site, and crack repair and damaged casting rectification. We also provide crankshaft grinding repair services, crankshaft grinding machines, rebabbitting bearings, etc. Contact us at rajshahani@rapowersolutions.com, info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Metal Stitching And Metal Locking Services Metal Stitching, also known as Cold Metal Repair or Metal Locking, is a means to restore broken cast iron, cast steel, or aluminum without welding or heat.Instead of melting the metal like welding does, this method uses specially designed metal keys and stitching pins (locks) to pull the cracked … Continue reading “Metal Stitching & Metal Locking Services for Marine and Power Plants   “

Onsite Crankshaft Grinding Machines – Worldwide Supplier

Onsite crankshaft grinding machine is a specialised machine that is used to manufacture, repair, and recondition crankshafts on site. The engine’s backbone is the crankshaft, which converts piston motion into rotation. Consequently, its precision is essential. Crankshafts can develop surface imperfections, erosion, or scoring over time. Through the restoration of engines to their exact proportions with a faultless finish, our machine guarantees their dependability and efficiency.

RA Power Solutions is emerging as a worldwide supplier of such machines, enabling engine and repair shops, power plants, and marine operators to carry out crankshaft repairs without removing them from the engine block.

Crankshaft Grinding Machine Ready for Dispatch
Crankshaft Grinding Machine Ready for Dispatch

Important Features:

  • A finish that meets international standards is achieved through high-precision grinding, which maintains strict tolerances of less than 10 microns.
  • It is portable and lightweight, allowing for immediate on site crankshaft maintenance at the designated location.

User-Friendly:

  • This device is suitable for both novice and seasoned technicians, as it is designed to be low-maintenance and trouble-free.
  • A Wide Range of Applications: It is suitable for marine engines, power plants, and heavy industrial apparatus, as it does not necessitate disassembly.

Applications:

  • Marine Industry: Large ship engines can be repaired on site without the need for removal.
  • The crankshafts of diesel generators function effectively in power facilities.
  • Heavy engineering is suitable for the construction of buildings, mining, and industrial machinery.

Benefits:

  • Restoring crankshafts rather than replacing them with costly alternatives results in cost savings.
  • Increased Engine Life: Prevents deterioration and extends the lifespan of the engine.
  • The advantage of onsite repair is that it eliminates the necessity of transporting large engines to workshops.
  • Enhanced Performance: Ensures a smoother operation, reduced fuel consumption, and reduced friction.
  • Time-saving: Restoration can be completed more rapidly than the process of obtaining new materials.
Bushes Used in Crankshaft Grinding Machine
Bushes Used in Crankshaft Grinding Machine
Crankshaft Grinding Machine for Big Diameter
Crankshaft Grinding Machine for Big Diameter

Global Presence:

Over 200 Onsite Crankshaft Grinding Machines and crankshaft grinding and polishing equipment have been supplied globally by RA Power Solutions. Our apparatus is utilised in the following regions:

  • Asia: India, Saudi Arabia, the United Arab Emirates, Indonesia, Sri Lanka, and Bangladesh
  • Africa: Burkina Faso, Tanzania, Ghana, Kenya, Egypt, South Africa, and Nigeria
  • Greece, Turkey, Italy, Germany, the United Kingdom, and the Netherlands comprise Europe.
  • Americas: the United States, Canada, Mexico, and Brazil
  • Oceania comprises Australia and New Zealand.

We are committed to enhancing the profitability of transportation companies, repair shops, power plants, and heavy industries by reducing costs, minimizing downtime, and expanding our global presence.

Packing in Progress Insitu Crankshaft Grinding Machine
Crankpin Grinding Machine

For additional information about the Onsite Crankshaft Grinding Machines, Onsite Crankshaft Grinding Equipment. Please contact us at rajshahani@rapowersolutions.com, info@rapowersolutions.com, or +91 9582647131 or +91 9810012383.

FAQs:

Q1. What is onsite crankshaft grinding, and how does it work?

Onsite crankshaft grinding (in situ grinding) is a process where damaged crankpins or main journals are repaired using portable grinding machines directly at the site, without dismantling the engine.

Q2. What are the benefits of using an onsite crankshaft grinding machine?

The key benefits include reduced downtime, lower repair costs, elimination of transportation hassles, precision repairs meeting OEM standards, and extended crankshaft life.

Q3. Which industries use onsite crankshaft grinding machines?

These machines are widely used in marine, power plants, diesel generator sets, offshore platforms, heavy engineering, and industrial plants where large engines are in operation.

Q4. What crankshaft sizes can be repaired using portable grinding machines?

RA Power Solutions machines can handle a wide range of crankshaft diameters, from small engines to large marine and industrial engines, with high accuracy.

Q5. Does RA Power Solutions provide worldwide supply and training for these machines?

Yes, RA Power Solutions supplies crankshaft grinding machines globally and provides operator training to ensure easy and efficient use at any site.

Onsite crankshaft grinding machine is a specialised machine that is used to manufacture, repair, and recondition crankshafts on site. The engine’s backbone is the crankshaft, which converts piston motion into rotation. Consequently, its precision is essential. Crankshafts can develop surface imperfections, erosion, or scoring over time. Through the restoration of engines to their exact proportions … Continue reading “Onsite Crankshaft Grinding Machines – Worldwide Supplier”

Onsite Crankshaft Grinding in Singapore

Singapore, being one of the world’s busiest maritime hubs, demands engine components that perform flawlessly even under the harshest conditions. When a crankshaft develops wear, taper, ovality, or damage, traditional repair often requires removing the engine components, incurring heavy transport expenses, and resulting in costly downtime. In situ crankshaft grinding, also known as onsite crankshaft grinding, offers a smarter alternative. At RA Power Solutions, we specialize in insitu crankshaft grinding and crankshaft repair, delivering high precision, minimal disruption, and cost-effective solutions in Singapore.

What Is Onsite Crankshaft Grinding and Repair?

In situ crankshaft grinding means repairing the crankshaft’s main journals or crankpins without dismantling the engine or removing the crankshaft from its block. By using portable grinding and polishing machines, technicians restore worn or damaged surfaces to OEM standards. Crankshaft repair in this context encompasses grinding, polishing, inspection, and, if necessary, reconditioning of the crankshaft, all performed directly onsite.

onsite crankshaft grinding under process
onsite crankshaft grinding under process
Onsite Crankshaft Machining
Onsite Crankshaft Machining

Why Singapore Needs Insitu Crankshaft Grinding?

  • High Maritime Traffic and Tight Schedules: Vessels docked at Singapore cannot afford long engine-down periods. Onsite services reduce downtime drastically.
  • Industrial Engines and Power Plants: Many industries in Singapore operate heavy-duty diesel or marine engines; delaying repair causes huge production losses.
  • Cost and Logistics: Transporting crankshafts or engines overseas or even across regions involves heavy costs, customs, handling, etc. Onsite services avoid many of these expenses.
  • High Quality and Reliability Demands: Singapore’s regulatory environment and quality expectations require repairs that meet strict OEM tolerances, something insitu crankshaft grinding can deliver.

Our Onsite Crankshaft Grinding and Repair Services in Singapore

At RA Power Solutions, our in situ crankshaft repair in Singapore includes:

  • Portable onsite crankshaft grinding and polishing using machines capable of diameters ranging from approximately 35 mm to 700 mm and meeting OEM tolerances.
  • We perform surface finishing and polishing to restore bearing contact, thereby reducing vibration, noise, and wear.
  • Emergency/on-voyage repairs: Our teams are ready to respond quickly when downtime must be minimized.
Crack DetectionTestof-Wartsila VASA Engine Model
Crack Detection Test of Wartsila VASA Engine Model
inspection of crankshaft machining
inspection of crankshaft machining

Key Benefits:

BenefitExplanation
Reduced DowntimeRepairs happen onsite no removal or long transport, meaning engines are back in operation faster.
Cost SavingsLess labor for dismantling, fewer logistics costs, and lower risk of damage in transit.
Precision and OEM ComplianceWe use grinding machines and techniques to restore taper, ovality, and surface finish to manufacturer specs.
Convenience and FlexibilityRepairs happen onsite, with no removal or long transport, meaning engines are back in operation faster.

Why Choose RA Power Solutions for Onsite Crankshaft Repair in Singapore?

  • Decades of experience worldwide in insitu crankshaft grinding and onsite repair.
  • Machines and technicians are capable of handling crankshaft diameters up to 700 mm.
  • Fast mobilization and emergency response to minimize downtime.
  • Stringent adherence to OEM standards and international quality tolerances.
  • We provide transparent cost estimates and have a strong track record with maritime and industrial clients in Singapore.

RA Power Solutions delivers expert onsite crankshaft grinding and repair services for major engine brands, including Caterpillar, Wartsila, Cummins, Yanmar, Daihatsu, MAN, and MAK. Our certified technicians operate across the Middle East (UAE, Saudi Arabia, Qatar, Bahrain, Kuwait, Oman, Iran, and Iraq) and throughout the Caribbean region, including Trinidad and Tobago, Jamaica, Barbados, and Central America. With advanced portable grinding equipment and 24/7 emergency response, we eliminate costly downtime by performing precision repairs onsite without engine removal, ensuring your operations stay running while meeting OEM specifications.

Crankshaft grinding and polishing
Crankshaft grinding and polishing

For more information regarding insitu crankshaft grinding services, please contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.

FAQs:

Q1: What is the difference between crankshaft grinding and in situ crankshaft grinding?

A: Crankshaft grinding normally implies workshop removal and machining; insitu crankshaft grinding repairs the crankshaft onsite without dismantling.

Q2: Can you repair any crankshaft damage using in situ methods?

A: Most surface wear, taper, ovality, and minor damage can be addressed; severe cracks or structural defects may require alternative approaches.

Q3: What size crankshafts can you service?

A: Our onsite grinding and polishing covers crankshaft diameters from approximately 35 mm up to 700 mm.

Q4: How quickly can you respond to an emergency crankshaft repair in Singapore?

A: We aim for rapid mobilization, typically within 24-48 hours, depending on location and severity of damage.

Q5: Will onsite crankshaft grinding affect engine warranties or compliance?

A: When OEM standards are met and documented, compliance is maintained; RA Power Solutions ensures all repair tolerances are within the manufacturer’s specifications.

Singapore, being one of the world’s busiest maritime hubs, demands engine components that perform flawlessly even under the harshest conditions. When a crankshaft develops wear, taper, ovality, or damage, traditional repair often requires removing the engine components, incurring heavy transport expenses, and resulting in costly downtime. In situ crankshaft grinding, also known as onsite crankshaft … Continue reading “Onsite Crankshaft Grinding in Singapore”

Crankpin Bearings for MAK, MAN, Yanmar, and Daihatsu Engines

The crankpin bearing, also known as the rod bearing journal, is essential for attaching the crankshaft to the connecting rod and ensuring smooth rotation under large loads. Top-quality crankpin bearings are used in powerful diesel engines manufactured by MAK, MAN, Yanmar, and Daihatsu to reduce friction, wear, and engine failure.

Tri Metal Bearing
Tri-Metal Bearings

RA Power Solutions: Your Trusted Source

With over 45 years of global engineering excellence, RA Power Solutions maintains a ready stock of both standard and undersized crankpin and main journal bearings for leading engine types, including Yanmar, Daihatsu, MAK, and MAN.

Why undersized bearings matter:

  • After crankshaft grinding, standard-size bearings often no longer fit.
  • Ship owners can’t wait for long delivery leads—undersized bearings must be available immediately to avoid costly downtime.
Undersize Crank Pin Bearings
Undersized Crankpin Bearings

Comprehensive Inventory—Models & Sizes

RA Power Solutions holds a wide range of undersize and standard bearings. A few examples include:

Engine MakeModels & Undersize Ranges
YanmarS185L: 0.80–2.00 mm

6N18AL-DN/DV: 0.40–2.80 mm
Daihatsu6DL-16: 2.50–4.00 mm

5DC-17: 0.50–4.00 mm

5DK-20: up to 5.00 mm

8DKM-28: 0.50–4.00 mm
MAK8M20: 1.00–2.00 mm undersize
MANCME 5L 16/24: 0.50–2.50 mm

6L 23/30 H: select step undersizes

9ASL 25/30: 2.50–4.00 mm undersize

On Site Support—Speed & Precision

  • Technicians often carry undersized bearings directly on site, enabling immediate installation after crankshaft grinding—minimizing engine downtime.
  • Depending on location, bearings can also be dispatched by courier for urgent repairs.
  • All bearings meet strict international quality standards, and RA Power can even manufacture custom sizes if beyond standard specifications.
Undersize crankpin bearing ready for stock
Undersize crankpin bearing ready for stock

Why Choose RA Power Solutions for Crankpin Bearings?

  • Extensive availability of both standard and undersized bearings across top engine makes.
  • Immediate solution: Technicians can fit bearings onsite right after grinding.
  • Customization: Tailored sizes beyond manufacturer limits when needed.
  • Global logistics: Fast courier dispatch ensures timely delivery globally.
  • Quality assurance: Meets strict manufacturing and performance standards.

Need Bearings for MAK, MAN, Yanmar, or Daihatsu Engines?

Contact RA Power Solutions today for reliable, high-precision crankpin bearings:

Email: rajshahani@rapowersolutions.com or info@rapowersolutions.com

Phone: +91-9582647131 / +91-9810012383

FAQs:

1. What is a crankpin bearing?

Crankpin bearing supports the crankshaft and enables smooth rotation under heavy loads.

2. Why do crankpin bearings fail?

They usually fail due to poor lubrication, contamination, or misalignment.

3. Can undersize crankpin bearings be supplied?

Yes, undersize bearings are available after crankshaft grinding.

4. Which engines use crankpin bearings?

Engines like MAK, MAN, Yanmar, and Daihatsu rely on crankpin bearings.

5. Can crankpin bearings be replaced onsite?

Yes, experienced engineers can replace crankpin bearings directly onboard.

The crankpin bearing, also known as the rod bearing journal, is essential for attaching the crankshaft to the connecting rod and ensuring smooth rotation under large loads. Top-quality crankpin bearings are used in powerful diesel engines manufactured by MAK, MAN, Yanmar, and Daihatsu to reduce friction, wear, and engine failure. RA Power Solutions: Your Trusted … Continue reading “Crankpin Bearings for MAK, MAN, Yanmar, and Daihatsu Engines”

Undersized Bearings & Crankpin Bearings for Marine and Diesel Engines

When it comes to marine and diesel engines, we at R A Power Solutions know that accuracy and dependability are not optional; they are required. That’s why we’re happy to have a large inventory of undersized bearings and crankpin bearings in stock, available to ship right away. We make and store parts that fulfill the highest engineering standards for ships, power plants, and industrial generators.

Undersized Bearings in Stock – Ready for Dispatch

We currently stock high-quality undersized bearings for the following diesel and gas engine models:

YANMAR Diesel Engine Bearings

  • 6N18AL-DN / DV — Diameter: 145 mm
  • YANMAR S185L — Diameter: 140 mm

MAN Diesel Engine Bearings

  • CME 5L 16/24 — Standard Diameter: 130 mm
  • MAN 9ASL 25/30 — Standard Diameter: 195 mm
  • MAN 6L 23/30 H — Standard Diameter: 185 mm

Daihatsu Diesel Engine Bearings

  • 5DK20 — Standard Diameter: 170 mm
  • 5DC-17 — Standard Diameter: 145 mm
  • 6DL-16 — Standard Diameter: 120 mm
  • 8DKM28 — Standard Diameter: 235 mm

Allen Engine Bearings

  • PVBCS 12 F — Standard Diameter: 190.45 mm to 190.47 mm

Gas Engine Bearings

  • DEUTZ MWMTBG32V16 — Diameter: 204.50 mm

 MAK Diesel Engine Bearings

  • 8M20 — Standard Diameter: 152 mm

Crankpin Bearings for Different Engine Models—Engineered by R A Power Solutions

Crankpin bearings play a crucial role in ensuring that large diesel engines operate smoothly. These bearings hold up the crankshaft journal so that it can turn under large loads and high temperatures. This is especially important in marine engines, power plants, and heavy-duty industrial generators. 

High-Precision Manufacturing by R A Power Solutions

We design and supply custom crankpin bearings compatible with a wide variety of engine models and applications. With over 45 years of engineering excellence, we’ve become a globally trusted name in the reconditioning and supply of engine components. Our crankpin bearings are known for:

  • OEM-standard manufacturing
  • Precise fitting and clearances
  • Long service life, even in extreme conditions
crankpin bearings for different type of engines
crankpin bearings for different type of engines

Commitment to Quality Service

At R A Power Solutions, quality is more than just a policy—it’s our promise. Our services are designed to provide not only parts but end-to-end support:

  • Rigorous Quality Control
    Every bearing is tested for tolerances, metallurgy, and durability before dispatch.
  •  Technical Engineering Support
    Our experienced technicians offer fitting assistance, on-site installation, and application analysis.
  • Global Reach & Fast Dispatch
    With inventory in stock and a network of logistics partners, we deliver promptly worldwide.
  • Reliable Customer Support
    Our team is available around the clock to assist with orders, queries, or technical guidance.

Get in Touch Today

Whether you need undersized bearings, crankpin bearings, or expert guidance on engine part replacements, R A Power Solutions is here to help.

FAQs

1. What are undersized bearings and when should they be used in marine engines?

Customers often want to understand the specific conditions under which undersized bearings are recommended over standard ones.

2. How can I determine the correct undersize for crankpin bearings after regrinding the crankshaft?

This is a practical concern for engineers and ship owners who need precise bearing dimensions after crankshaft repair.

3. Are undersized bearings as reliable and durable as standard bearings in diesel engines?

Reliability is a key concern, especially in heavy-duty marine applications where failure can be costly.

4. Can I reuse crankpin bearings after a crankshaft has been ground undersize?

Some customers look for cost-saving options and need clarity on whether reused or new undersized bearings are necessary.

5. Do you supply custom undersized crankpin bearings for specific engine models like MAK, MAN, or Wartsila?

Many users have brand-specific engines and want assurance of compatibility and availability.

When it comes to marine and diesel engines, we at R A Power Solutions know that accuracy and dependability are not optional; they are required. That’s why we’re happy to have a large inventory of undersized bearings and crankpin bearings in stock, available to ship right away. We make and store parts that fulfill the … Continue reading “Undersized Bearings & Crankpin Bearings for Marine and Diesel Engines”

Why Onsite Inspection of Crankshaft Matters?

When serious machinery stops due to crankshaft issues, downtime and repair costs can skyrocket. Onsite inspection of crankshafts offers a smarter solution: bringing precision diagnostic tools right to the equipment, whether at sea, in a power plant, or on heavy-duty industrial engines. This method helps engineers identify wear, cracks, and misalignment without removing the crankshaft from its engine housing.

Core Steps in Onsite Crankshaft Inspection

Visual Examination: Check crankpin journals, oil holes, fillets, and counterweights for scoring, discoloration, or surface defects

Dimensional Measurements: Use micrometers and dial indicators to assess journal diameters, ovality, taper, and run‑out tolerances

Hardness Testing: Portable hardness testers confirm material strength and surface treatment integrity

Crack Detection: Utilize non-destructive methods, such as magnetic particle inspection, dye penetrant testing, or ultrasonics, to detect hidden cracks.

Surface Finish Check: Profilometers assess roughness to ensure the surface meets OEM standards.

Inspection of onsite crankshaft machining
Inspection of onsite crankshaft machining

Advantages of Onsite Over Workshop Inspection

  • Zero Transportation Risk & Downtime
    Avoid dismantling, shipping delays, and handling mistakes by inspecting in place.
  • Fast, Cost‑Effective Solutions
    Field diagnostics and repair plans are generated immediately, minimizing production losses
  • Precision Checks with Portable Tools
    Onsite techniques maintain OEM tolerances through calibrated gear and experienced technicians.
Onsite Inspection of Crankpin Before Polishing & Grinding
Onsite Inspection of Crankpin Before Polishing & Grinding
Onsite Inspection of Crankshaft Grinding Machine

Common Issues Caught by Onsite Inspection

Crankshaft Cracks: Even faint stress lines become visible through NDT methods during routine checks.

Excessive Wear or Ovality: Regular measurement helps catch taper or roundness issues early and avoid journal failure.

Surface Damage: Polishing, grinding, or realignment can be scheduled ahead of major malfunctions.

The Role of Mobile In‑Situ Grinding & Repair

  • In many cases, after inspection, it’s faster to grind or polish the onsite crankshaft using portable precision tools. This method:
  • Restores OEM tolerances
  • Straightens bent shafts
  • Smooths surface imperfections
  • Requires no crankshaft removal
Onsite Crankshaft Grinding and Polishing under process

Why Choose RA Power Solutions?

  • 45+ Years of Expertise
  • 24/7 Worldwide Availability
  • Portable, OEM-Grade Equipment
  • In-House Manufacturing of Tools
  • ISO Certified Services
  • Strong Client Portfolio Across Marine, Power & Industrial Sectors
Crankpin Ready After Grinding and Polishing
Crankpin Ready After Grinding and Polishing

Boost Reliability with RA Power Solutions

If you’re facing crankshaft issues or planning preventive maintenance, trust a company that brings the workshop to your engine. With RA Power Solutions, you get high-quality on site inspection of crankshaft services without delays, disassembly, or extra cost.

For more details on the Onsite Inspection of Crankshaft, Onsite Crankshaft Repair, or email us at info@rapowersolutions.com. Call at +91-9582647131,+91 9810012383.

FAQs:

1. What is an onsite inspection of a crankshaft?

Onsite crankshaft inspection involves checking the condition of the crankshaft at the equipment’s location, without removing it from the engine. It includes dimensional checks, crack detection, hardness testing, and alignment verification.

2. What are the benefits of insitu crankshaft repair?

Insitu crankshaft repair minimizes downtime, avoids expensive transport or disassembly, and restores crankshaft geometry quickly. It’s a cost-effective solution for marine, industrial, and power plant engines.

3. How long does onsite crankshaft inspection and repair take?

Most inspections are completed within a few hours. If grinding or straightening is needed, the repair process may take 1–2 days, depending on the extent of damage and the number of journals involved.

When serious machinery stops due to crankshaft issues, downtime and repair costs can skyrocket. Onsite inspection of crankshafts offers a smarter solution: bringing precision diagnostic tools right to the equipment, whether at sea, in a power plant, or on heavy-duty industrial engines. This method helps engineers identify wear, cracks, and misalignment without removing the crankshaft … Continue reading “Why Onsite Inspection of Crankshaft Matters?”

Onsite Crankshaft Repair And In Situ Crankshaft Grinding Services – Comprehensive Guide

In the world of marine, industrial, and power generation engines, crankshaft damage can bring operations to a standstill. Fortunately, onsite crankshaft repair and in situ crankshaft grinding services have revolutionized the way industries handle such emergencies, eliminating the need for disassembly or transportation.

What Is Onsite Crankshaft Repair?

Onsite crankshaft repair (also known as crankshaft repair onsite or on site crankshaft repair) refers to the process of repairing crankshaft damage directly at the site of operation. Whether on a vessel, power plant, or offshore platform, this service ensures minimal downtime and cost-effective solutions. The combination of onsite crankshaft grinding and repairing results in extended crankshaft life and improved engine performance.

In Situ Crankshaft Grinding: The Modern Solution

In situ crankshaft grinding, also known as insitu crankshaft grinding, is a specialized process where the crankshaft is ground in its original position using a customized onsite crankshaft grinding machine. This technique ensures perfect alignment and eliminates the need for dismantling. Our team provides advanced onsite crankshaft grinding services, ensuring the crankpins and main journals are restored to the original manufacturer’s specifications.

Why Choose In Situ Crankshaft Repair Services?

  • Fast turnaround
  • Eliminates transportation costs
  • Precision results with portable machines
  • Minimal downtime and disruption
  • Environmentally friendly approach

Complete Onsite Crankshaft Grinding and Polishing

After grinding, the next critical step is crankshaft polishing. Our crankshaft polishing services use high-grade abrasives to enhance surface finish and increase longevity. The combination of onsite crankshaft grinding and polishing results in extended crankshaft life and improved engine performance.

Crankpin Repair and Insitu Machining Expertise

We specialize in onsite crankpin repair, which involves insitu machining of the crankpin to restore it to its standard size and finish. Our technicians use precision-engineered tools for insitu grinding of crankpins, ensuring accurate geometry and surface integrity.

With years of experience in insitu crankshaft machining, we have developed efficient solutions for all types of crankshaft issues, including scoring, taper wear, and journal ovality.

High-Precision In Situ Crankshaft Machining Services

In situ crankshaft machining or on site crankshaft machining is the ideal solution when engine components are too large or critical to be moved. We deploy skilled engineers with portable tools to provide in situ crankshaft machining with micron-level accuracy.

Our in situ crankshaft repair services are trusted worldwide for large engine applications including marine engines, diesel generators, and industrial compressors.

Why Our Services Stand Out

We utilize a state-of-the-art in situ crankshaft grinding machine that can handle crankshafts up to 700mm in diameter. Our mobile teams are available globally to deliver emergency onsite crankshaft grinding repair and insitu crankshaft grinding repair anytime, anywhere.

With our holistic approach, we cover every aspect:

When engine downtime is not an option, trust our expert in situ crankshaft repair services. With advanced tools, skilled technicians, and decades of experience, we offer the most reliable onsite crankshaft grinding, crankshaft repair on site, and crankpin repair solutions globally. For efficient, cost-effective, and precision onsite crankshaft grinding services, contact our team today and keep your engines running smoothly.

FAQ

1. What is the difference between onsite crankshaft repair and in situ crankshaft grinding?

Onsite crankshaft repair is a broader term that includes all types of crankshaft repair work done at the client’s location. In situ crankshaft grinding is a specific process within that service, involving precision grinding of the crankshaft journals or crankpins in their original position using portable machines.

2. Can crankshaft repair be done without removing the crankshaft from the engine?

Yes, our in situ crankshaft grinding and repair services allow us to perform repairs without dismantling the crankshaft from the engine, saving time and reducing costs.

3. How long does onsite crankshaft grinding usually take?

The duration depends on the extent of damage and the number of crankpins or journals to be repaired. Typically, a single crankpin can be ground within 24–30 hours, including inspection, setup, and final polishing.

4. What types of engines can you repair onsite (marine, power plant, etc.)?

We service marine engines, diesel power plant generators, offshore equipment, and large industrial compressors. Our technicians are experienced in handling all major engine makes and models.

5. What is the maximum diameter crankshaft you can grind onsite?

Our portable in situ crankshaft grinding machine can handle crankshafts up to 700 mm in diameter.

In the world of marine, industrial, and power generation engines, crankshaft damage can bring operations to a standstill. Fortunately, onsite crankshaft repair and in situ crankshaft grinding services have revolutionized the way industries handle such emergencies, eliminating the need for disassembly or transportation. What Is Onsite Crankshaft Repair? Onsite crankshaft repair (also known as crankshaft … Continue reading “Onsite Crankshaft Repair And In Situ Crankshaft Grinding Services – Comprehensive Guide”

Onsite Crankshaft Grinding and Repair Services

When it comes to maintaining heavy-duty machinery, engine performance and reliability are crucial. At the core of every engine lies the crankshaft, a component that demands precise maintenance to ensure consistent operation. Traditionally, repairing a damaged crankshaft required complete disassembly and transportation to a workshop, resulting in extended downtime and high costs. Fortunately, modern advancements have introduced in situ crankshaft grinding machines, making it possible to perform repairs directly at the site, eliminating the need for dismantling.

Overview of onsite crankshaft grinding and repair

Understanding In Situ Crankshaft Grinding Machines

In situ crankshaft grinding machines are specialized tools designed to repair and restore crankshafts directly within the engine assembly. These machines eliminate the need to remove the crankshaft from the engine block, thereby reducing downtime and associated costs. They are particularly beneficial in situations where only one or two crank pins are damaged, making it uneconomical to send the entire crankshaft to a distant workshop.

crankshaft grinding and polishing under process

Advantages of On Site Crankshaft Repair

  • Reduced Downtime: The ability to conduct onsite crankshaft repair means equipment can be restored swiftly without disassembly or transport.
  • Cost Savings: Avoids the need for dismantling and shipping large engine components.
  • OEM Compliance: Advanced in situ crankshaft repair services meet or exceed original equipment manufacturer (OEM) specifications.
  • Versatility: Suitable for onsite crankpin repair, crankshaft polishing services, and full crankshaft repair onsite.

Why Choose Onsite and In Situ Crankshaft Machining?

  • Quick turnaround time
  • No transportation of heavy engine blocks
  • Consistent results with minimal vibration
  • Services like in situ crankshaft grinding repair and on site crankshaft machining are available globally.

This method also supports in situ crankshaft machining and in situ crankshaft repair for engines that have suffered wear, ovality, scoring, or bearing failures.

Inspection of the crankpin before grinding

Why Choose RA Power Solutions

RA Power Solutions stands out as a leader in the field of in situ crankshaft grinding, offering comprehensive onsite crankshaft repair services globally. With decades of expertise, state-of-the-art equipment, and a team of highly skilled technicians, RA Power Solutions ensures minimal downtime and OEM-standard accuracy in every crankshaft repair. Whether it’s onsite crankshaft grinding, insitu machining & polishing of crankshaft, or urgent crankpin repair.

Crankpin after grinding and polishing
Crankpin after grinding

For more details of the Insitu Crankshaft Grinding Services, In Situ Crankshaft Grinding, or email us at info@rapowersolutions.com, Call at +91-9582647131,+91 9810012383.

When it comes to maintaining heavy-duty machinery, engine performance and reliability are crucial. At the core of every engine lies the crankshaft, a component that demands precise maintenance to ensure consistent operation. Traditionally, repairing a damaged crankshaft required complete disassembly and transportation to a workshop, resulting in extended downtime and high costs. Fortunately, modern advancements … Continue reading “Onsite Crankshaft Grinding and Repair Services”

Crack Repair Using Metal Stitching and Metal Locking | RA Power Solutions

Cracks in cast iron and other metal components can lead to significant operational challenges in the power generation, marine, manufacturing, and heavy engineering industries. Traditional repair methods, like welding, often introduce thermal stress, weakening the material over time. With over 44 years of experience, RA Power Solutions specializes in metal stitching and metal locking, two highly effective cold repair techniques that restore the integrity of cracked components without causing additional damage.

What is Metal Stitching?

Metal stitching is a cold repair method for mending cracks in cast iron, aluminum, and other metals without welding. It involves drilling precise holes along the crack, inserting metal stitching pins, and locking the pieces together to restore the component’s original strength. This technique is ideal for engine blocks, turbine casings, compressors, and other high-stress industrial machinery parts.

Metal stitching and Metal locking
Metal stitching and Metal locking

What is Metal Locking?

Metal locking is a reinforcement method used alongside metal stitching. Custom-designed locks are inserted into the stitched area to provide additional support, preventing further crack progression and ensuring a long-lasting repair. This method enhances the durability of the repaired component, making it as strong as or even stronger than the original structure.

metal locking
Metal locking

Why Choose Metal Stitching and Metal Locking?

Compared to traditional welding, metal stitching and locking offer several advantages:

  1. Cold Repair Process: No heat is applied, preventing material distortion, stress buildup, and further cracking.
  2. Onsite Repairs: No need to transport heavy machinery; repairs can be performed at the client’s location, reducing downtime.
  3. Retains Original Strength: Unlike welding, which can weaken cast iron, metal stitching and metal locking maintain or even improve the structural integrity.
  4. Cost-Effective: Eliminates the need for expensive replacements and reduces overall maintenance costs.

Benefits of Metal Stitching and Metal Locking

RA Power Solutions has successfully performed repairs for various industries, including:

  • Marine Industry: Repairs on ship engine blocks and connecting rods to avoid costly replacements.
  • Power Plants: Restoration of turbine casings, generators, and compressors to maintain efficiency.
  • Manufacturing Plants: Fixing cracks in heavy-duty machines and industrial equipment.

RA Power Solutions provides metal stitching and metal locking services in countries across Asia, the Middle East, Europe, Africa, and the Americas, including India, UAE, USA, UK, Saudi Arabia, Germany, Singapore, and Australia. With a strong global presence, the company offers onsite repair solutions for industries like marine, power plants, and heavy engineering, helping clients avoid costly replacements and downtime. Their expertise extends to Malaysia, Indonesia, Qatar, Oman, Kuwait, Bangladesh, Sri Lanka, the Philippines, Vietnam, Nigeria, Brazil, Germany, Singapore, Malaysia, Indonesia, and South Africa, ensuring reliable crack repair services worldwide.

Crack repair by metal stitching
Crack repair by metal stitching

For more information regarding repair cast iron, repair crack cast iron, or cast iron repair,  crack repair by metal stitching and metal locking, contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.




Cracks in cast iron and other metal components can lead to significant operational challenges in the power generation, marine, manufacturing, and heavy engineering industries. Traditional repair methods, like welding, often introduce thermal stress, weakening the material over time. With over 44 years of experience, RA Power Solutions specializes in metal stitching and metal locking, two … Continue reading “Crack Repair Using Metal Stitching and Metal Locking | RA Power Solutions”

On Site Crankshaft Repair of HIMSEN HYUNDAI 6H 17/28 | Turkey

RA Power Solutions successfully repaired the Crankshaft of Himsen Hyundai 6H17/28 engine at MIP Mersin, Turkey. The engine, owned by an Italian company, experienced a major breakdown due to a failure in one of its auxiliary engines.

RA Power Solutions promptly deployed two skilled technicians equipped with onsite crankshaft grinding tools. The repair was efficiently conducted while the vessel remained anchored at MIP Mersin, ensuring minimal downtime and reliable restoration of the engine.

Following are the major Engine and Crankpin details:

S. No.Engine and Crankpin Details
1.Engine MakeHIMSEN HYUNDAI
2.Engine Model6H 17/28
3.Crankpin Diameter Standard175.00MM
4.Crankpin Bearing Width60.00 MM
5.Place of Execution of Grinding of CrankpinMIP Mersin, Turkey
6.Name of Shipping CompanyReputed Company from Italy

Key Observations of the Crankshaft:

Visual Inspection Findings:
(i) The breakdown was caused by the failure of the lubricating oil pump, resulting in damage to all connecting rod bearings.
(ii) Bearing material was embedded on all six crankpins and was meticulously removed.
(iii) Dimensional inspection conducted after polishing revealed taper and ovality measurements ranging from 0.22 mm to 0.86 mm.

MPI Test Before Crankshaft Grinding and Repair
MPI Test Before Crankshaft Grinding and Repair

HIMSEN HYUNDAI 6H 17 28 Before Grinding and Polishing
HIMSEN HYUNDAI 6H 17 28 Before Grinding and Polishing

The Dimensional Inspection Report of Six (6) Number Crankpins of HIMSEN HYUNDAI 6H 17/28:

SIZE OF CR PINS BEFORE REPAIR
AAaCCcBBbMinSTDOvality
CR-1 174.74174.85174.62174.73174.66174.88174.62175.000.38MM
CR-2  174.83174.92174.80174.78174.83174.93174.78175.000.22MM
CR-3  174.70174.90174.55174.69174.48174.54174.48175.000.52MM
CR-4  174.78174.88174.79174.72174.79174.92174.72175.000.28MM
CR-5  174.78174.88174.76174.92174.72174.78174.72175.000.28MM
CR-6  174.22174.80174.14174.78174.37174.85174.14175.000.86MM

(iv) Hardness testing indicated acceptable levels overall, with minor exceptions in a few areas, which were assessed as non-critical.
(vi) Magnetic Particle Inspection (MPI) revealed minor hairline cracks, while all other parameters remained within acceptable limits.

MPI Test of HIMSEN HYUNDAI 6H 17 28
MPI Test of HIMSEN HYUNDAI 6H 17 28 Before Grinding

Actions Taken by RA Power Solutions Technicians:

1. The grinding of all six (6) crankpins was undertaken by our insitu crankshaft grinding machine.
2.  Three (3) number of crankpins diameter was reduced by 1.00 MM and the final size was maintained as 174.00 MM.
3. Three (3) number of crankpins diameter was reduced by 1.50 MM and the final size was maintained at 173.50 MM.

Final Report After Grinding is Pasted Below:

SIZE OF CR PINS AFTER REPAIR
AAaCCcBBbMinU/SOvality
CR-1173.48173.49173.49173.48173.50173.50173.48173.500.02MM
CR-2173.98173.99174.00173.99173.98173.99173.98174.000.02MM
CR-3173.49173.50173.50173.48173.49173.50173.48173.500.02MM
CR-4173.98173.99173.98174.00173.98174.00173.98174.000.02MM
CR-5173.99173.99173.98174.00173.98173.99173.98174.000.02MM
CR-6173.48173.49173.49173.50173.50173.48173.48173.500.02MM


We ensure all six crankpins are maintained with a stringent tolerance of 0.02 mm, delivering exceptional accuracy and optimal performance in every project.

Global Expertise in Crankshaft Repair
RA Power Solutions is a global leader in onsite crankshaft repair and grinding services. With extensive experience, we have successfully completed projects across the globe, including Dubai, Fujairah, Qatar, Saudi Arabia, Oman, Iraq, Togo, Malta, Freetown, Egypt, Malaysia, Iran, Indonesia, Vietnam, Jordan, and many other locations.

CR Pin After Grinding of HIMSEN HYUNDAI
CR Pin After Grinding of HIMSEN HYUNDAI

Our highly skilled technicians are available 24/7 and can be deployed at short notice. Many of our team members hold valid US visas, allowing us to serve clients in South America, the Caribbean, and other regions efficiently.

Get in Touch for Professional Crankshaft Services:
Email: rajshahani@rapowersolutions.com | info@rapowersolutions.com
Phone: +91 9582647131 | +91 9810012383.

FAQs

1. What is onsite crankshaft repair for HIMSEN HYUNDAI 6H 17/28 engines?

Onsite crankshaft repair for HIMSEN HYUNDAI 6H 17/28 engines by RA Power Solutions involves in-situ grinding and polishing of crankpins and main journals without shaft removal. This saves downtime, avoids disassembly, and restores crankshaft dimensions as per OEM standards.

2. How is crankshaft grinding performed on ships in Turkey?

RA Power Solutions performs crankshaft grinding on ships in Turkey using portable, high-precision equipment. The process includes inspection, in-situ grinding, and polishing of crankpins or main journals, all done onboard without shaft removal, ensuring minimal downtime and cost.

3. What are the benefits of in situ crankshaft repair on HIMSEN engines?

In-situ crankshaft repair on HIMSEN engines by RA Power Solutions reduces downtime, eliminates the need for shaft removal, and avoids costly dismantling and transport. It ensures fast, cost-effective restoration of crankpins or main journals to OEM specifications onboard the vessel.

RA Power Solutions successfully repaired the Crankshaft of Himsen Hyundai 6H17/28 engine at MIP Mersin, Turkey. The engine, owned by an Italian company, experienced a major breakdown due to a failure in one of its auxiliary engines. RA Power Solutions promptly deployed two skilled technicians equipped with onsite crankshaft grinding tools. The repair was efficiently … Continue reading “On Site Crankshaft Repair of HIMSEN HYUNDAI 6H 17/28 | Turkey”