insitu crankshaft grinding and polishing Archives - Rebabbitting Bearing https://rebabbittingbearing.com/tag/insitu-crankshaft-grinding-and-polishing/ Mon, 09 Feb 2026 06:32:29 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.1 https://rebabbittingbearing.com/wp-content/uploads/2025/07/cropped-logo-raps-32x32.png insitu crankshaft grinding and polishing Archives - Rebabbitting Bearing https://rebabbittingbearing.com/tag/insitu-crankshaft-grinding-and-polishing/ 32 32 Crankshaft Grinding And Repair of High Capacity Engine https://rebabbittingbearing.com/crankshaft-grinding-and-crankshaft-repair-of-high-capacity-engine/?utm_source=rss&utm_medium=rss&utm_campaign=crankshaft-grinding-and-crankshaft-repair-of-high-capacity-engine https://rebabbittingbearing.com/crankshaft-grinding-and-crankshaft-repair-of-high-capacity-engine/#respond Tue, 31 Mar 2020 08:55:47 +0000 http://rebabbittingbearing.com/blog/?p=684 Crankshafts are the heart of large diesel engines, whether in marine vessels, power plants, or heavy industrial machinery, and their performance directly affects overall engine reliability and life. High-capacity engine crankshafts can be extremely large, sometimes 6–12 meters long and weighing up to 20 tons, with crankpins and main journals ranging from 500 mm to...

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]]> Crankshafts are the heart of large diesel engines, whether in marine vessels, power plants, or heavy industrial machinery, and their performance directly affects overall engine reliability and life. High-capacity engine crankshafts can be extremely large, sometimes 6–12 meters long and weighing up to 20 tons, with crankpins and main journals ranging from 500 mm to over 700 mm in diameter. When wear, deformation, or surface damage occurs, on-site crankshaft grinding and repair become essential to restore performance without costly downtime.

Why On-Site Crankshaft Repair is Recommended

  • Irrespective of whether diesel engines operate in marine or land-based applications, they run continuously in most cases, which results in various deviations in the crankshaft.
  • Technicians need to check the measurements of various parameters, including taper and ovality, periodically or during overhauling and maintain them within the stipulated tolerances.
  • The parallelism, linearity, and run-out have to be within limits.
  • The surface finish of the crankpin and main journal have to be within The surface finish of the crankpin and the main journal have to be within the standards.
  • The radius fillet and lubricating oil hole should be according to the original profile and dimensions as per the drawing of the crankshaft.

Above are some of the reasons that require crankshaft grinding and crankshaft repair.

RA Power Solutions Pvt. Ltd. with experience of more than four decades, undertakes crankshaft grinding and crankshaft repair up to the diameter of 700 mm on-site and without removal of the crankshaft from the engine block. The length and the weight of the crankshaft are not a criterion for us for Crankshaft grinding or Crankshaft repair.

The following parameters are maintained at the time of crankshaft grinding and crankshaft repair

  • The Taper and ovality of the crankpin and main journal are strictly maintained as per the tolerances stipulated in the manufacturer’s manual.
  • After RA Power Solutions undertakes grinding and repair, the team maintains and checks all parameters, such as surface finish, radius fillet profile, lubricating oil holes, and parallelism, according to the original specifications.
  • Experienced technicians inspect the crankshaft for all parameters and prepare inspection reports, which they share with the clients.
On Site Crankshaft Repair
Onsite Crankshaft Repair
Crankshaft Repair Onsite
Crankshaft Repair Onsite

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RA Power Solutions gives great importance during crankshaft grinding and crankshaft repair not only to maintaining taper and ovality but also to achieving the surface finish of the crankpin and main journal within an Ra value of 0.3 µm.

Why Choose Professional On-Site Repair Services

Companies specializing in on-site crankshaft grinding and repair bring:

  • Decades of experience with precision field machining
  • Portable grinding equipment for large diameter crankshafts
  • Skilled technicians trained in inspection and dimensional validation

This approach ensures crankshafts operate more smoothly, last longer, and deliver higher reliability—without the cost and complexity of removal and workshop rework.

Crankshaft Grinding Onsite
Crankshaft Grinding Onsite

For your requirement of onsite crankshaft grinding, on-site machining services, in situ crankshaft grinding repair, crankshaft grinding and repair, marine crankshaft repair, you may email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Check Out Our Latest YouTube Video here: https://youtu.be/uxMGFe8RWkc

FAQs:

1. What is onsite crankshaft grinding and repair?

Onsite crankshaft repair restores worn or damaged crankpin and main journal surfaces using portable grinding machines without removing the crankshaft from the engine block.

2. Why is crankshaft grinding necessary?

Grinding corrects wear, taper, ovality, and surface damage, restoring the crankshaft to manufacturer-specified tolerances for smooth operation.

3. Can crankshafts of any size be repaired on site?

Yes, modern portable machines can handle crankshafts with journal diameters of up to 700 mm, regardless of their overall length or weight.

4. What industries use on-site crankshaft repair?

Marine, power generation, industrial engines, compressors, and heavy machinery sectors benefit from this service.

5. How does onsite repair save time and cost?

It eliminates the need for removal, transportation, and workshop rework, which significantly reduces downtime and overall cost.

The post Crankshaft Grinding And Repair of High Capacity Engine appeared first on Rebabbitting Bearing.

]]> https://rebabbittingbearing.com/crankshaft-grinding-and-crankshaft-repair-of-high-capacity-engine/feed/ 0 Crankpin Grinding by Crankshaft Grinding Machine – RA Power Solutions https://rebabbittingbearing.com/crankpin-grinding-by-crankshaft-grinding-machine/?utm_source=rss&utm_medium=rss&utm_campaign=crankpin-grinding-by-crankshaft-grinding-machine https://rebabbittingbearing.com/crankpin-grinding-by-crankshaft-grinding-machine/#respond Thu, 28 Jun 2018 05:46:15 +0000 http://rebabbittingbearing.com/blog/?p=346 A diesel power plant based in northern India, having 10 nos. of 12.3 MW Wartsila diesel generating sets, reported a severe casualty involving one of their Wartsila generators. RA Power Solutions’ team of technicians rushed to the power plant with the measuring instruments and onsite crankshaft grinding equipment to assess the cause of the breakdown....

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]]> A diesel power plant based in northern India, having 10 nos. of 12.3 MW Wartsila diesel generating sets, reported a severe casualty involving one of their Wartsila generators. RA Power Solutions’ team of technicians rushed to the power plant with the measuring instruments and onsite crankshaft grinding equipment to assess the cause of the breakdown.

We inspected the crankshaft in detail with dimensional checks, hardness tests, and MPI for cracks and deflection. We found damage on one of the crankpin journals caused by a big-end bearing failure.

Grinding & Repair of Crankpin is in Process
Grinding & Repair of Crankpin is in Process

Inspection & Diagnosis:

  • Taper and ovality in the crankpin is observed as 0.70 mm.
  • Due to the failure of the bearing, deep line marks were visible.
  • Hardness and MPI tests were done, and no cracks were observed.

RA Power Solutions’ Edge

RA Power Solutions used the latest design of onsite crankshaft grinding machine, having almost no vibrations. The crankpin was undersized by 1.5 mm, maintaining the tolerance within 10 microns. Our technicians took only 18 hours to complete the Crankshaft repair from the time of the start of the preliminary inspection, grinding, and final inspection. The repair of the crankpin in such a short time was possible due to the latest technology, an onsite crankshaft grinding machine, and the experience of our technicians.

Inspection of Crankpin Before Grinding
Inspection of Crankpin Before Grinding
Inspection of Crankpin Under Process
Inspection of Crankpin Under Process

RA Power Solutions has four decades of experience in working on crankshafts of high-capacity main and auxiliary engines. Factory training prepares our technicians to repair crankshafts. They strictly follow the manufacturer’s specifications and tolerances.

For more information on Portable Crankshaft Grinding Machine, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs:

2. When does a crankpin need grinding?

A: You need grinding when a crankpin shows ovality or taper. It also becomes necessary if you notice scoring or surface damage from bearing failure.

1. What is crankpin grinding?

A: It’s the process of machining and restoring worn or damaged crankpins on a crankshaft to OEM specifications.

3. Crankpin grinding done onsite?

A: Yes, with portable crankshaft grinding machines, repairs can be done at the site without dismantling the crankshaft.

5. How much downtime does the process take?

A: In most cases, we complete inspection, grinding, and finishing within 18–24 hours.

4. How accurate is onsite crankpin grinding?

A: Modern machines achieve tolerances within 10 microns, ensuring smooth operation.

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