What Is a Crankshaft Grinding Machine?

A crankshaft grinding machine is a specialized machine tool designed to regrind crankshaft journals, restoring their original dimensions, surface finish, and alignment. These machines are widely used in marine engines, power plants, diesel generators, compressors, and automotive engines.

At RA Power Solutions, our machines are engineered for high accuracy, durability, and ease of operation, ensuring long-term performance even in heavy-duty applications.

Why Choose RA Power Solutions for Crankshaft Grinding Machines?

RA Power Solutions has earned a strong global reputation as a leading crankshaft grinding machine manufacturer due to its commitment to quality, innovation, and customer satisfaction.

Key Advantages of Our Crankshaft Grinding Machines

(i) High-precision grinding for all crankshaft sizes
(ii) Portable and in-situ grinding capability
(iii) Robust construction for industrial use
(iv) Easy installation and operation
(v) Low maintenance and long service life
(vi) Custom-built solutions for specific engine models

Our machines are designed to meet international quality standards, making them suitable for customers across Asia, Europe, the Middle East, Africa, and the Americas.

Global Supplier of Crankshaft Grinding Machines

As a recognized crankshaft grinding machine supplier, RA Power Solutions exports machines to different countries worldwide, supporting marine workshops, power plants, and heavy engineering industries.

We provide:

(i) Worldwide shipping

(ii) Technical support

(iii) Training and installation assistance

(iv) After-sales service

This global approach ensures our customers receive complete solutions—not just machines.

Applications of Crankshaft Grinding Machines

Our crankshaft grinding machines are extensively used in:

1. Marine engine crankshaft grinding
2. Power plant crankshaft repair
3. Diesel generator crankshaft reconditioning
4. Automotive  crankshaft grinding
5. On-site crankshaft grinding services

The flexibility of RA Power Solutions’ machines allows grinding without removing the crankshaft from the engine, saving both time and cost.

Why Crankshaft Grinding Is Better Than Replacement

Replacing a crankshaft can be expensive and time-consuming. Using a crankshaft grinding machine offers several benefits:

(i) Cost-effective repair

(ii) Reduced downtime

(iii) Extended engine life

(iv) Environmentally friendly solution

RA Power Solutions specializes in precision crankshaft grinding technology, ensuring restored crankshafts meet or exceed OEM specifications.

Advanced Technology & Engineering Excellence

Each crankshaft grinding machine manufactured by RA Power Solutions is built using advanced engineering techniques and undergoes strict quality checks. Our focus on precision machining, vibration control, and surface finish ensures superior grinding results every time.

Trusted Manufacturer for International Markets

With decades of industry experience, RA Power Solutions has become a preferred onsite crankshaft grinding machine manufacturer in India, supplying machines to international clients seeking dependable and proven solutions.

Our machines are widely appreciated for:

Accuracy | Reliability | Competitive pricing | Global service support

For any information, please email us at rajshahani@rapowersolutions.com, info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

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RA Power Solutions manufactures crankshaft grinding machines ranging from 60 mm to 700 mm in diameter. We designed the crankshaft grinding machine in technical collaboration with a leading Italian company. The Crankshaft Grinding machine is portable, lightweight, and easy to operate. The technicians can transport the machine as luggage to any part of the world.

Conventional Bench-Type Crankshaft Grinding Machines Are Outdated For the Repair of Crankshafts

In olden times, in case of any breakdown in the crankshaft, the only option was to remove it from the ancient block and send it to the designated workshop, duly packed for repair. The whole process was not only time-consuming, but also very expensive for the complete engine to be disassembled. Additionally, the crankshaft could potentially sustain damage during transportation.

Primary Features of the Innovative Onsite Crankshaft Grinding and Polishing Machine

(i) The State-of-art onsite grinding machine replaced the obsolete heavy-duty bench-type crankshaft grinding machine.

(ii) The onsite crankshaft honing and polishing machine is portable, enabling operators to conveniently transport it aboard a vessel, to a power plant, or to any installation globally.

(iii) Simple to operate and straightforward to maintain.

(iv) We developed the onsite crankshaft grinding and polishing machine to ensure precise control of tolerances in taper, ovality, surface finish, runout, and other parameters. All adhere to the manufacturer’s specifications.

(v) Our workshop offers complimentary onsite training.

Assessment of Quality and Reliability in Insitu Crankshaft Grinding Equipment

RA Power Solutions is an ISO-certified organisation, dedicated to maintaining rigorous quality control standards throughout the manufacturing process.

The primary structural component of our insitu crankshaft grinding machine is manufactured from high-grade titanium steel, a material selected for its inherent vibration-dampening properties. This guarantees the seamless and accurate honing and polishing of crankshafts, even during vessel operation. We rigorously inspect each component and continuously refine its metallurgical characteristics using field-testing and performance data from operational environments.
Our in situ crankshaft grinding devices are available at competitive prices, rendering them accessible to shipping companies, power generation facilities, and engine repair establishments. Typically, it takes two to three assignments to recover the initial investment. Eliminate dependence on expensive European services; instead, procure your own equipment and assume complete responsibility for crankshaft maintenance, thereby realizing savings in both time and financial resources.

Introduction of the Crankshaft Grinding Machine by R A Power Solutions:

RA Power Solutions has revolutionised crankshaft repair with its onsite grinding machine. It can grind crankshafts without removing them from the block. Technicians travel worldwide with this portable machine and perform repairs directly onsite.

R A Power Solutions manufactures crankshaft grinding machines up to a diameter of 700 mm and has exported more than 88 machines all over the world.  We offer free onsite training for operating and maintaining the grinding machine. You may participate in the training at our training facility near New Delhi or arrange for our team to conduct the session at your location.

Engine repair companies, shipping companies, and high-capacity power plants widely use our crankshaft grinding machines for efficient and precise engine maintenance. We sold more than a thousand onsite crankpin and main journal grinding machines worldwide. All the machines are performing satisfactorily. References can be provided upon request.

We are executing crankshaft grinding repair services in Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, United Arab Emirates, Vietnam, UK, USA and other countries.

For more information on portable crankshaft grinding machines, crankshaft polishing crankpin machines, onsite grinding of crankshafts, and main journal grinding equipment, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

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The details are as follows:

Crankshaft Repair:

The damaged crankshaft of the DAIHATSU 5DC-17 engine was subject to the following inspection procedure:

• Dimensional inspection for taper and ovality.
• All five crankpins, each with a standard diameter of 145 mm, showed ovality and taper ranging from 0.62 mm to 0.76 mm. Technicians consider this range to be on the higher side.
• Technicians checked the crankpin hardness using a portable calibrated hardness tester. They observed that it remained within the specified limits
• Since an accident damaged the crankshaft, technicians performed crack detection on all crankpins using MPI. They did not find any cracks or abnormalities in the five crankpins.
• On visual inspection, radius radius-filled profile found damaged.
• Technicians checked the crankshaft deflection and observed that it remained within the specified limits.

Crankshaft Grinding:

Based on the initial inspection, our technicians undertook the onsite grinding of all the crankpins.

The crankpin size was reduced from the standard 145 mm to the following:

1. Minimum size after grinding is maintained as 142.98
2. Maximum size maintained after grinding is 143.00

All the parameters were checked during the final inspection, and the crankshaft was found acceptable.

The grinding of DAIHATSU 5DC-17 engine crankpin having a standard diameter of 145 mm and bearing with of only 64 mm was a challenge mainly because in this particular model of DAIHATSU 5DC-17 engine, the bearing width is too less and it’s difficult to accommodate the grinding tool on the crankpin. The old and leading grinding companies based in Europe and the UK do not have the facility and equipment to grind the crankpin with having width as small as 64 mm.

As a standard protocol, RA Power Solutions technicians prepare pre-inspection reports for all technical parameters they check before repairing the crankshaft. After completing the crankshaft repair of the DAIHATSU 5DC-17 engine, they prepare final reports using RA Power Solutions’ inspection formats. We keep these reports on record and share them upon request.

RA Power Solutions is proud to execute successfully the onsite grinding of the crankpin, having such a small bearing width. Technicians repaired the damaged engine block using metal stitching and the metal locking process. This process saved the block from rejection. The engine, after repair, is performing satisfactorily.

RA Power Solutions is the only company in the asian continent providing onsite crankshaft repair for the smaller crankpin width of even 40 mm. For further details, you may contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or  +91 9810012383.

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