What Is In-Situ Crankshaft Grinding & Why It Matters

Pulling off the crankshaft is a huge bother if you have a large engine block or a ship offshore. With in-situ crankshaft grinding, the crankshaft is repaired, reground, or polished in its original location without the need for disassembly, transportation, or additional work that would disrupt your schedule.

The Big Problems It Solves

• Downtime kills profits—When your engine’s down waiting for shop time, as a result, one part can delay everything. However, with in-situ crankshaft grinding, you can keep operations running smoothly.
• Cost savings—less transport + less labor + no costly reinstallation.
• Quality and precision — Modern portable machines can hit tolerances like ~0.015-0.02 mm, near parallelism, surface finishes that meet OEM specs.
• By cutting down on big lifts and unnecessary handling, you actively lower safety risks and prevent damage to other parts.

What Makes a Great In-Situ Crankshaft Grinding Service

1. Precision — tight tolerances, excellent finish (measured RA value, etc.)
2. Speed & readiness—portable, lightweight machines; teams that can mobilize fast.
3. Comprehensive service—not just grinding but inspection, straightening, polishing, connecting rod checking, etc.
4. Reliability & credibility—trained technicians, OEM compliance, strong after-sales, spares, etc.
5. Versatility—works in marine, offshore, and power plants

How We Do It Differently / Better

• We have 24/7 mobilization, supply for remote/offshore locations, spare consumables globally, OEM standard finish, and a better warranty.

At RA Power Solutions, we provide specialized crankshaft grinding machine, crankshaft grinding machine, crankshaft grinding repair, crank shaft grinding repair, onsite crankshaft grinding repair, on site crankshaft grinding repair, insitu crankshaft grinding, in situ crankshaft grinding, Onsite crankshaft grinding machine, on site crankshaft grinding machine, insitu crankshaft grinding machine, in situ crankshaft grinding machine, crank pin bearing, crankpin bearing, crankpin bearings, crank pin bearings, metal stitching, metal locking, metal stitching locking, engine block repair, crack repair by metal stitching, cast iron crack repair, crankpin polishing, crank pin polishing, inspection of crankshaft, crankshaft inspection, rebabbitting bearing, babbitt white metal, engine overhauling, crank pin grinding, grinding of crankpin, connecting rod, turbine shaft bearing services worldwide.

For inquiries, contact us at rajshahani@rapowersolutions.com, infor@rapowersolutions.com, or call +91-9810012383 / +91-9582647131.

RA Power Solutions specializes in comprehensive overhauling and grinding services for main and auxiliary engines, focusing on vessels and high-capacity diesel engines. With over 45 years of experience, their services include inspection, calibration, parts replacement, and advanced crankshaft grinding. The company brings extensive expertise, modern equipment, and skilled technicians to handle all types of engine grinding tasks, ensuring enhanced engine performance and longevity.

They handle engines from major manufacturers, including Wartsila, MAN, and Caterpillar, ensuring performance optimization and reliability.

The main and auxiliary engines are critical to the efficient functioning of any vessel. These engines endure high levels of stress, causing wear and tear on essential components like crankshafts, cylinder heads, and connecting rods. Regular grinding and reconditioning of these components prevent further deterioration, minimize the risk of engine failure, and ultimately extend the engine’s lifespan. Furthermore, grinding services are crucial to maintaining engine efficiency, reducing fuel consumption, and ensuring compliance with marine industry standards.

Crankshaft grinding is a core part of RA Power Solutions’ services. The crankshaft is a vital engine component that converts linear motion into rotary motion. However, due to operational stress, it can develop wear, cracks, or uneven surfaces. As a result of precision grinding, the crankshaft’s surface is restored to factory specifications, ensuring smooth and reliable engine operation. RA Power Solutions uses state-of-the-art portable grinding tools, allowing them to conduct this service onsite, which eliminates the need for costly dismantling and transportation of the engine.

Specialized In Situ Grinding Services

RA Power Solutions is renowned for its expertise in insitu onsite grinding services. This unique capability allows the company to perform grinding and repair work without removing the engine or its components from the vessel. In situ grinding is highly efficient, saves time, and significantly reduces costs for the client. Whether on a ship docked at port or offshore, RA Power Solutions’ skilled technicians can perform precise grinding on various engine parts, including the crankshaft, cylinder liners, and camshafts.

RA Power Solutions offers cost-effective, efficient, and high-quality grinding services for main and auxiliary engines. Their expertise in in insitu grinding, combined with the use of advanced equipment and stringent quality checks, makes them a preferred choice for marine engine maintenance and repair.

We provide top overhauling of diesel engine, marine engine cylinder liners, on site engine repair, maintenance and repair services, overhauling of diesel engine, engine overhaul services, and crankshaft repair services. For any information on our services, please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

YANMAR 6N18L-SV Auxiliary Engine Accident Details –

The YANMAR 6N18L-SV auxiliary engine experienced a significant failure due to the following issues:

1. Connecting Rod Bolt Failure: The connecting rod bolts in the crankpin unit #02 failed, causing the connecting rod to hit the engine block.
2. Engine Block Damage: The window cover of the engine block’s sitting area sustained severe damage. The casting was shattered into multiple pieces.
3. Additional Damage: The incident completely broke the window cover of the engine block. It also extensively damaged crankpin unit #02 on the crankshaft.

Inspection of Crankshaft and Engine Block of YANMAR 6N18L-SV:

The team inspected the damaged crankpin unit #02 based on the following parameters:
(a) The dimensional inspection of crankpin unit #02 revealed an ovality of 0.16 mm.
(b) The impact from the connecting rod caused the crankpin to develop deep depressions and noticeable impact marks.
(c) The team noticed severe damage on both sides of the radius fillet profile.
(d) The team detected minor hairline cracks on the crankpin, which, based on our experience, typically appear after such a severe incident.
(e) The team observed higher-than-normal hardness at certain spots.
(f) The engine block sustained severe damage, as evidenced by the photographs, with the total length of the cracks measuring 46 inches.

We consistently perform onsite crankshaft repairs and in situ crankshaft grinding in locations such as Dubai, Fujairah, Qatar, Saudi Arabia, Oman, Iraq, Togo, Malta, Freetown, Egypt, Malaysia, Iran, Indonesia, Vietnam, Jordan, and many more.

For more information about our crankpin grinding repair services, please email us at info@rapowersolutions.com or call +91 9582647131 or +91 9810012383.

Key Features:

• No dismantling required – Crankshaft repair on site, directly within the engine block.
  
• Compact & lightweight – Easy to transport and insert through inspection windows.
  
• Dual functionality – Grinding and polishing with a single machine.
  
• Accurate performance – Maintains dimensional accuracy within 10 to 25 microns.
  
• Superior finish – Achieves surface finish RA values as per OEM standards.
  
• User-friendly – Simple to operate with basic training provided.
  
• Multiple drive options – Available in pneumatic, electric, or hydraulic versions.
  
• Low operational cost – Economical solution with minimal downtime.
  
• Global support – Easy availability of spare parts and consumables worldwide.
  
• After-sales service – Comprehensive support and operator training.

Technical Specifications:

• Diameter Range: 50 mm to 600 mm
  
• Accuracy: Maintains up to 10 to 25 microns
  
• Surface Finish: RA value as per OEM standards
  
• Drive Options: Pneumatic, Electrical, Hydraulic
  
• Design: Compact, lightweight, and easy to handle

Application Areas:

The in-situ crankshaft grinding machine is a mobile, lightweight tool engineered for repairing crankshafts and shafts directly at the engine site, without removing the component from its housing. Designed to fit through tight inspection openings, this compact and portable equipment allows grinding and polishing of worn sections on engines, compressors, pumps, turbines, and other industrial machinery, significantly reducing downtime and maintenance expenses compared to traditional workshop methods. It delivers accurate dimensional control and fine surface finishes in line with OEM specs while being simple to use and adaptable with different power options. Portable onsite repair also eliminates transport costs and enables maintenance in confined or remote locations.

Need Expert Crankshaft Repair Onsite?

Thus, RA Power Solutions is ready to deliver fast, dependable, and world-class, on-site crankshaft repair, in situ crankshaft repair services, insitu crankshaft machining—right at your location.

Call/WhatsApp: +91 9582647131
Website: www.rapowersolutions.com
Email: rajshahani@rapowersolutions.com | info@rapowersolutions.com

Get in touch today and restore your crankshaft with precision and expertise.