In-Situ Machining and Repair of Crankshafts: A Complete Guide

RA Power Solutions undertakes in situ machining and repair of crankshafts for 2-stroke and 4-stroke engines installed in power plants, ships, and various other industrial applications.

We offer professional in-situ machining services and crankshaft repairs for diameters up to 700 mm. Through the concept of in-situ machining, grinding and repair works are executed directly in place without removing the crankshaft from the engine block, which drastically reduces engine downtime.

In the shipping industry, extracting a massive crankshaft to send it to an onshore workshop is practically impossible. Consequently, on-site crankshaft machining is rapidly growing in popularity—not just for vessels, but also for high-capacity generators operating in land-based power plants.

Damage of crankpin of Caterpillar 3416B

  Caterpillar engine 3416B Crankpin after grinding & polishing

Damage of crankpin of Caterpillar 3416B  

Caterpillar engine 3416B Crankpin after grinding & polishing

Technical Support and Precision Engineering

Backed by over four decades of experience, RA Power Solutions delivers elite technical support for crankshafts up to 700 mm in diameter. We execute machining to tolerances that frequently surpass standard workshop levels, meticulously maintaining critical technical parameters—including taper, ovality, and surface finish—well beyond the thresholds stipulated in standard maintenance manuals.

Onsite repair of damaged crankshaft of MAN 5L 16/24    

  MAN Crank Pin after Grinding & Polishing

Onsite repair of damaged crankshaft of MAN 5L 16/24

MAN Crank Pin after Grinding & Polishing


Our Rigorous Pre-Repair Inspection Protocol

Before any cutting or grinding begins, our standard procedure entails a comprehensive multi-point inspection:

  • Dimensional Inspection: Precise evaluation of taper and ovality.

  • Crack Detection: Thorough NDT screening utilizing magnetic particle inspection (MPI).

  • Hardness Testing: Verification of material metallurgical properties.

  • Surface Finish Analysis: Pre- and post-machining smoothness checks.

  • Deflection & Run-Out Inspection: Ensuring structural alignment where applicable.

  • Visual Profiling: Careful examination of radius fillets and lubricating oil hole profiles.

Because we manufacture our own specialized in-situ machining equipment, we can custom-tailor or modify our portable tools to meet unique client requirements and deliver international-grade solutions anywhere in the world.

Damage crankpin of Wartsila Engine 8L32   

      Wärtsilä crankshaft after grinding & polishing, mirror finish

Damage crankpin of Wartsila Engine 8L32

Wartsila Crankpin after grinding & polishing mirror finish


Advantages of In-Situ Crankshaft Machining

Opting for on-site overhauls over traditional workshop extraction provides unmatched operational and financial benefits:

  1. Minimized Engine Downtime: Keeps the engine operational much faster by eliminating lengthy teardown procedures.

  2. No Removal Required: Eliminates the need to extract the heavy shaft from the engine block or ship it to an external facility.

  3. Significant Cost Reduction: Dramatically lowers total repair expenditures by avoiding heavy crane rentals, major structural dismantling, and expensive logistics.

  4. Rapid Global Deployment: Our technicians hold valid seaman books and visas, enabling them to reach your site anywhere in the world within hours.

  5. Accompanied Baggage Equipment: Lightweight, advanced in situ machinery is carried

  6. directly as checked-in airline luggage, bypassing customs delays entirely.

  7. Cost-Competitiveness: Our services are cost-optimized, remaining far more economical than equivalent crankshaft repair providers based in the UK, Europe, and the USA.


Deutz MWM TBG632V16 Crankpin under grinding process      

  Crankpin after grinding & polishing

Deutz MWM TBG632V16 Crankpin under grinding process

    Crankpin after grinding & polishing


Comprehensive Engine and Rotating Equipment Expertise

RA Power Solutions undertakes repairs across a vast spectrum of engines, compressors, pumps, and rotating machinery. We regularly service major global manufacturers, including:

  • MAN B&W

  • Wartsila

  • Caterpillar (e.g., Cat 3416B)

  • Deutz (e.g., Deutz MWM TBG632V16)

  • Daihatsu & Yanmar

  • Volvo, Cummins, & SKL

  • Mirrlees Blackstone, Ruston, Allen, & Pielstick

Global Certifications and Reach

RA Power Solutions is an ISO 9001:2015 (quality management system) and ISO 14001:2015 (environmental management system) certified enterprise.

Our mobile engineering teams regularly execute on-site crankshaft repairs and grinding projects across the globe, serving clients throughout the Middle East (Dubai, Oman, Saudi Arabia, Qatar, Abu Dhabi, Sharjah, Bahrain, Kuwait, Iraq, Ajman, Umm Al-Quwain, Fujairah), the USA; Vietnam; and numerous Caribbean nations (including Antigua and Barbuda, Belize, Dominica, Dominican Republic, Grenada, Guyana, Haiti, Jamaica, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Trinidad, and Tobago)

“We also have available engine crankpin bearings in our stock.” For more information, visit now: https://rebabbittingbearing.com/

For technical assistance regarding crankshaft repair, onsite crankshaft grinding, or crankshaft replacement, contact RA Power Solutions at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call +91 9582647131 or +91 9810012383.

Source URL: https://rapowersolutions.com/BlogDetails.aspx?blogname=in-situ-machining-service-and-repair-of-crankshaft
Watch Our YouTube Video: https://www.youtube.com/channel/UCxcP2Jc6DGFdpBokIcxVyBg


Crankshaft grinding of Daihatsu 5DC-17 Engine    

  Daihatsu 5DK-20 crankpin after grinding & polishing

Crankshaft grinding of Daihatsu 5DC-17 Engine

Daihatsu 5DK-20 crankpin after grinding & polishing


Damaged crank pin of Allen Engine PVBCS12F     

Allen Engine Crankpin after Grinding

Damaged crank pin of Allen Engine PVBCS12F   

Allen Engine Crankpin after Grinding

Location: 411, 4th Floor, Arcadia, South City II, Sector 49, Gurugram, Haryana 122018, India

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