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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Key Features of the Crankshaft Grinding Machine

1. Portable & Modular Engineering

The machine’s lightweight and modular construction enables quick transportation, assembly, and operation directly at site locations—including confined engine rooms, vessels, offshore platforms, and remote industrial facilities.

2. Wide Grinding Range

With the capability to machine crankshafts from 35 mm to 700+ mm, it supports a broad spectrum of engines used in marine propulsion, diesel power plants, industrial equipment, and heavy machinery.

3. Advanced Vibration-Control Technology

Manufactured using specially developed vibration-dampening alloys, the machine ensures exceptional stability during operation. This directly contributes to a superior surface finish and precision, even in the most demanding environments.

4. Micron-Level Accuracy

The machine restores crankpins and main journals to original OEM tolerances. Ovality, taper, and size corrections are executed with high precision, ensuring long-term reliability and smooth engine functioning.

5. Combined Grinding & Polishing System

Grinding and polishing are performed in the same setup without disturbing the alignment. This integrated design saves significant time while delivering consistent journal geometry.

6. Rapid Setup & Alignment

Special fixtures and alignment tools allow the machine to be mounted quickly with perfect axial positioning. This is particularly critical in constrained spaces, as it reduces the overall repair duration.

7. Exceptional Surface Finish

The machine delivers a mirror-like surface suitable for high-speed and high-load-bearing applications, improving lubrication and extending crankshaft life.

How the Machine Operates

(i) Mounting & Fixture Alignment

Custom brackets are used for precise mounting on the crankshaft.

(ii) Measurement & Diagnosis

Dial gauges and micrometers record journal wear, taper, and ovality.

(iii) High-Precision Grinding

Controlled grinding restores the exact journal size and geometry.

(iv) Polishing

The same machine produces a smooth, bearing-ready finish.

(v) Final Inspection

Journal dimensions are rechecked to confirm OEM tolerance compliance.

Operational Advantages

Minimal Downtime

Repairs are completed onsite, significantly reducing engine outage time.

Major Cost Savings

Eliminates logistics, crane usage, transportation, and external workshop costs.

Extends Engine Life

Accurate restoration ensures long-term durability and prevents premature engine failure.

Ideal for Any Environment

Marine vessels, offshore rigs, industrial plants, and remote installations benefit from its portability and precision.

RA Power Solutions: Global Leader in Crankshaft Grinding Technology

RA Power Solutions Pvt. Ltd. is the designer, manufacturer, and worldwide supplier of the advanced Onsite Crankshaft Grinding Machine. With over four decades of experience in engine repair and rotating machinery services, the company has become a trusted name across the marine, industrial, and power sectors.

Why RA Power Solutions Stands Out

1. In-House Design & Manufacturing

The Crankshaft Grinding Machine is designed and built entirely by RA Power Solutions, ensuring:

• superior metallurgy

• vibration-free performance

• long operational life

• precise grinding accuracy

2. Global Onsite Service Expertise

Their team has performed 10,000+ onsite crankshaft grinding and repair jobs across more than 90 countries, giving them unparalleled field experience.

3. Continuous Innovation

The machines are regularly upgraded based on real-world feedback from:

• marine engineers

• power plant operators

• industrial maintenance teams

Each new generation offers improved efficiency, portability, and accuracy.

4. End-to-End Support

RA Power Solutions provides:

• machine supply

• operator training

• spare parts

• onsite grinding services

• technical consultancy

5. Proven Track Record

Widely used in:

• marine main engines (MAK, MAN, Wärtsilä, Yanmar, etc.)

• diesel generator sets

• cement and steel plants

• petrochemical facilities

• offshore platforms

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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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Certainly, you have read that correctly. No disassembly. There is no shipping available. There is no need to wait for weeks.

What distinguishes RA Power Solutions?

They possess a fleet of in situ crankshaft grinding machines that are portable, compact, and designed to perform precise repairs at your location. This service is available whether you are on a marine vessel in the middle of the ocean or at a power plant that cannot shut down.
These devices accommodate crankshaft diameters ranging from 35 mm to 700 mm. That essentially encompasses the majority of auxiliary and main engines utilized in heavy industry, mining, power plants, and shipping.

Why In Situ Crankshaft Grinding Is a Smart Choice

• No disassembly is required.

• Beware of the antiquated approach that necessitates the complete removal of the crankshaft and its transportation to a workshop.
• The portable machine penetrates the engine block through the inspection window and completes the task immediately.

• Significant time saving

• Repairs that have historically required weeks?
• The team can resolve specific crankshaft issues in as little as 24 hours with RA Power Solutions—prompt turnaround results in minimal downtime.

• Extremely cost-effective

• There are no logistics expenses.
• There is no charge for reinstallation.
• No production revenue was lost while the crankshaft was awaiting its return from the workshop.
• A rapid resolution results in a reduction in expenditures.

• Precision equivalent to that of the original equipment

1. The crankpin is precisely restored to the OEM tolerance through the crankshaft grinding and polishing procedure.
2. The surface quality has been enhanced to 0.2 micron Ra, which translates to smooth AF.
3. It is also possible to polish and refine.
4. Polishing/honing can be performed without the need for full grinding if the crankpin has minor damage or if a surface finish enhancement is required.

Real Results. Real Experience.

This is not a novel concept for RA Power Solutions. For more than 45 years, they have been servicing engines on a global scale, including those in factories, power plants, and ships.
They did not merely perfect the process; they also constructed their own onsite crankshaft milling machine and have already sold over 70 units worldwide.
The most intriguing aspect is that they provide complementary training to the client’s technicians during the project, ensuring that your team is fully informed about the situation.

Why the industry relies on RA Power Solutions

Over 45 years of experience in crankshaft repair
• Portable crankshaft grinding machines for 35 mm to 700 mm shafts
• Precision repair without engine disassembly
• Fast turnaround and global reach
• Technicians trained onsite

Are you prepared to restore your crankshaft without interrupting your operations?

Call/WhatsApp: +91 9582647131, +91 9810012383.

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

Refrain from squandering time on obsolete crankshaft repairs. Ensure that your plant remains operational. Continue earning.
Our organization, RA Power Solutions, is committed to your support.

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Features of the Crankshaft Grinding Machine

1. Portable Design:

• Crankshaft grinding machine specifically developed for onsite crank pin grinding and polishing in confined spaces.
• Eliminates the need to remove the crankshaft from the entablature, minimizing downtime.
• Lightweight and Ergonomic:
• We continuously optimize component weight to ensure easy handling and global transportation.
• Designed for operator comfort and convenience during repair operations.

2. High-Quality Construction:

• We build the main body with high-grade titanium alloy for unmatched strength and vibration control.

3. Precision and Performance:

• Capable of maintaining close tolerances of 0.02 mm.
• The crankshaft grinding machine is used even while the vessel is sailing, ensuring uninterrupted operations.

4. Single-Setting Operation:

• Both crankpin and main journal grinding and polishing can be performed in one setup.
• Eliminates the need for multiple adjustments during operation.

5. Versatile Functionality:

• Suitable for honing and polishing when damage is minor, without reducing the crankshaft diameter.
• Effectively removes surface line marks, pitting, and rust to improve surface finish.

6. Complete Supply Package:

• Delivered with all necessary consumables, sufficient to grind or polish one complete crankshaft.

7. Training and Support:

• A senior technician is deputed to the client’s site for comprehensive training.
• Training covers equipment operation, handling, and maintenance.

The Crankshaft Grinding Machine isn’t just portable—it’s precise.

We’re talking accuracy within 10 microns (that’s micrometer-level precision), with surface finishing that complies with international quality standards. It’s lightweight, simple to carry, and super user-friendly.

Technicians don’t need to be hardcore specialists. With a quick 1-week training (yes, literally just a week), they’re able to grind and polish crankshafts like pros.

In Situ Crankshaft Grinding Machine | R A Power Solutions

RA Power Solutions has already delivered 1500+ crankshaft grinding and polishing machines worldwide, powering industries like:

• Marine & shipping fleets
• Repair & maintenance workshops
• Heavy engineering plants

These machines aren’t just tools—they’re profit boosters.
Less downtime means more productivity, which saves more money.

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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