crankshaft inspection Archives - Rebabbitting Bearing

Engine Bearings For Crankpin and Main Journal

Raj Shahani — Mon, 13 Apr 2026 09:14:46 +0000

Engine bearings manufactured from tri-metal for the crankpin and main journal of the crankshaft are supplied by RA Power Solutions.

We provide crankshaft grinding services, repair, and overall maintenance of auxiliary and main engines installed on vessels. We also extend these services to high-capacity power plants spread all over the world.

While standard-size bearings are readily available in stock with engine manufacturers, we have experienced that most of the time it is difficult to obtain tri-metal bearings for the crankpin and main journal of the crankshaft in undersized.

Undersized crankpin bearings

Crankpin Bearings For MAN & MAK Engines

White metal babbitt bearings

Undersized Bearings of Yanmar Diesel Engine

Requirement of Undersized Tri-Metal Bearings for Crankshaft

After grinding of the crankpin and main journal of the crankshaft, there is a requirement for undersized bearings, which are, in most cases, not readily available.

RA Power Solutions is the largest exporter of tri-metal bearings, mainly for diesel engines. We are listing below the names of a few popular engines and their models for which we maintain a ready stock of the bearings.

Sr No.	Description
Daihatsu 6DL-16 Standard Crankpin Diameter-120 mm
1	a) 2.50 mm Undersize Crankpin Bearing
	b) 3.00 mm Undersize Crankpin Bearing
	c) 4.00 mm Undersize Crankpin Bearing

MAN CME 5L 16/24 Standard Crankpin Diameter: 130 mm
2	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersized Crankpin Bearing

Yanmar Engine S 185L Standard Crankpin Diameter-140 mm
3	a) 0.80 mm Undersized Crankpin Bearing
	b) 1.20 mm Undersized Crankpin Bearing
	c) 1.60 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing

Yanmar Engine 6N18AL-DN/DV Standard Crankpin Diameter: 145 mm
4	a) 0.40 mm Undersized Crankpin Bearing
	b) 0.80 mm Undersized Crankpin Bearing
	c) 1.20 mm Undersized Crankpin Bearing
	d) 1.60 mm Undersized Crankpin Bearing
	e) 2.00 mm Undersized Crankpin Bearing
	f) 2.40 mm Undersized Crankpin Bearing
	g) 2.80 mm Undersized Crankpin Bearing

Daihatsu 5DC-17 Standard Crankpin Diameter-145mm
5	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersize Crankpin Bearing
	f) 3.00 mm Undersize Crankpin Bearing
	g) 4.00 mm Undersize Crankpin Bearing

MAK 8M20 Standard Crankpin Diameter: 152 mm
6	a) Standard Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing

Daihatsu 5DK-20 Standard Crankpin Diameter-170mm
7	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersize Crankpin Bearing
	f) 3.00 mm Undersize Crankpin Bearing
	g) 3.50 mm Undersize Crankpin Bearing
	h) 4.00 mm Undersize Crankpin Bearing
	i) 5.00 mm Undersize Crankpin Bearing

MAN 6L 23/30H Standard Crankpin Diameter: 185 mm
8	Key Position 12.5 x 15.5
	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersized Crankpin Bearing
	f) 3.00 mm Undersized Crankpin Bearing
	g) 4.00 mm Undersized Crankpin Bearing
	h) 5.00 mm Undersized Crankpin Bearing

	Key Position 7.7 x 10.7
	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersized Crankpin Bearing
	f) 3.00 mm Undersized Crankpin Bearing
	g) 4.00 mm Undersized Crankpin Bearing
	h) 5.00 mm Undersized Crankpin Bearing

Allen Engine PVBCS 12 F Standard Crankpin diameter – 190.45 mm to 190.47 mm
9	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing

MAN 9ASL 25/30 Standard Crankpin Diameter-195 mm
10	a) 2.50 mm Undersize Crankpin Bearing
	b) 3.00 mm Undersize Crankpin Bearing
	c) 4.00 mm Undersize Crankpin Bearing

Gas Engine Deutz MWM TBG32V16 Standard Crankpin diameter 204.50 mm
11	a) 0.50 mm Undersized Crankpin Bearing

MAN 9L28/32 H Standard Crankpin Diameter-230 mm
12	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersize Crankpin Bearing
	f) 3.00 mm Undersize Crankpin Bearing

Daihatsu 8DKM-28 Standard Crankpin Diameter-235 mm
13	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersize Crankpin Bearing

Daihatsu 8DK-32 Standard Crankpin Diameter-250 mm
14	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing

White Metal Babbitt Bearings

We also manufacture Babbitt white metal bearings and undertake the repair of old, damaged bearings for different applications such as alternators, intermediate shafts, turbines, pumps, etc.

Main Journal Bearings Standard & Undersize

Diesel engine bearings supplier

Engine Bearing Manufacturers

Crankpin Bearing Suppliers

R A Power Solutions: Complete Services for Crankshafts and Engines

R A Power Solutions not only sells bearings but also offers a full range of services at your location or in their workshop, such as

Grinding the crankshaft in place
Crankshaft repair and reconditioning
Grinding and polishing of crankpins on site
Repairing engine blocks and stitching metal
Emergency breakdown services worldwide
Repair services for marine and diesel engines

Our advanced portable equipment and experienced technicians enable us to deliver onsite services without dismantling, helping industries reduce downtime and operational costs.

We work with clients all over the world, including big areas like Saudi Arabia, the United Arab Emirates, Qatar, Kuwait, Oman, and Bahrain. We make sure that our service is quick and dependable.

After crankshaft grinding, the undersized crankpin and main journal bearings are very important. With ready stock availability and integrated repair services, R A Power Solutions ensures quick turnaround and dependable performance for all types of engines.

For undersized crankpin and main journal bearing requirements, please email us at info@rapowersolutions.com or call +91-9582647131 or +91-9810012383.

The post Engine Bearings For Crankpin and Main Journal appeared first on Rebabbitting Bearing.

Insitu Crankshaft Repair | Onsite Crankshaft Grinding And Polishing | 47 Years Of Expertise

Raj — Fri, 18 Apr 2025 11:27:42 +0000

RA Power Solutions Pvt. Ltd. has offered in situ crankshaft repair and polishing services for over four decades. The crankshaft is the most important part for keeping the engine running properly. It is an essential component of engines in marine boats, power plants, and heavy machinery. However, when it becomes damaged or worn out, it can bring operations to a standstill, resulting in costly repairs and downtime. RA Power Solutions, a global pioneer in crankshaft maintenance, has introduced its breakthrough in situ crankshaft grinding technology to Bangladesh. This unique approach is changing the game for industries throughout the country.

With the insitu crankshaft grinding machine, our trained specialists can arrive at a site in the shortest amount of time and fix the crankshaft without removing it from the main engine.

Efficient crankshaft on the engine Restoration: 35 to 700 mm in diameter Grinding Accuracy

Since the crankshaft is the engine’s central component, it transforms reciprocating motion into the linear movement that powers the engine through the use of connecting rods. With the process, technology, and onsite crankshaft grinding equipment from RA Power Solutions, crankshaft repair is now feasible without removing the crankshaft from the engine. These machines range in size from 35 mm to 700 mm. Our technology can repair crankshafts up to 700 mm in diameter, allowing us to fix any crankshaft, regardless of its weight or length.

In general, the crankshaft has several applications, including diesel generators and marine engines. Typical areas of crankshaft applications are as follows:

Compressors
Power generators
Forging hammers
Pumps
Marine engines

RA Power’s Journal and Crankshaft Machining Advantages:

The vast experience of having repaired over 10,000 shafts on any size Main or Auxiliary engine

Specially designed crankshaft machining tooling for insitu reconditioning without dismantling the full engine, deployed all around the globe.

A large, global team of highly skilled machining technicians ensures a rapid, expert response anytime and anywhere.

The latest breed of inspection instruments is available to undertake hardness tests, MPI, surface roughness tests, dimensional inspection, etc.

Our crankshaft grinding machine weighs 1/3rd of our competitors, saving on freight costs.

Giving ship and power plant crews the tools they need to grind and fix crankshafts on site

Years of crankshaft grinding and polishing by RA Power Solutions, it is now possible to not only grind and polish the crankshaft onsite, but also to repair the crankshaft by ship or power plant crew.

For more information on in situ crankshaft grinding, onsite crankshaft grinding, crankshaft grinding, insitu crankshaft grinding repair, onsite crankshaft machining, and crankshaft machining in situ, crankpin bearings, bearings for MAN and MAK engines please contact info@rapowersolutions.com, rajshahani@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs

1. What sizes of crankshafts can you repair onsite?

Customers often want to know the diameter range your equipment handles. RA Power’s insitu grinding is capable of servicing crankpins from 35 mm up to 700 mm (even 50–700 mm) without engine removal.

2. How much downtime and cost savings are involved?

One of the top concerns: how in-situ grinding cuts downtime and expense. By avoiding full engine disassembly and shipping, companies save significantly on labor, transport, and workshop costs.

3. What precision and finish can you achieve?

Customers ask if the onsite process meets OEM specifications. The portable machines deliver precision within 10–25 µm and achieve surface finishes (Ra) that align with OEM standards.

4. Can you repair crankshafts while the engine is in operation or at sea?

A common need in marine and power-plant contexts. Yes—insitu grinding can be done on-vessel (even underway) or at power plants, offering portable, global 24/7 service.

5. What inspection and quality assurance processes do you use?

Customers want confirmation of quality control. Services typically include MPI/crack detection, hardness testing, surface roughness measurement, dimensional checks, vibration testing, ensuring journals are restored to spec.

The post Insitu Crankshaft Repair | Onsite Crankshaft Grinding And Polishing | 47 Years Of Expertise appeared first on Rebabbitting Bearing.

Precision Crankshaft Grinding in Tanzania | RA Power Solutions

Raj — Mon, 31 Jul 2023 11:16:20 +0000

Introduction:

Welcome to the world of precision engineering and exceptional crankshaft grinding services in Tanzania. When it comes to ensuring the optimal performance & longevity of your engines, nothing compares to the expertise delivered by our skilled technicians.

With cutting-edge technology & a commitment to greatness, our crankshaft grinding services guarantee that your crankshafts will be converted to their original specifications, eliminating any spots that may hinder your engine’s efficiency.

Damaged Crankpin

Whether you are in requirement of standard repairs or complex custom solutions, our dedicated team is ready to deliver outstanding results, ensuring your engines run smoothly and reliably. Experience the epitome of quality & reliability with our professional crankshaft grinding services in Tanzania.

The Expertise of RA Power Solutions in Crankshaft Grinding Services

RA Power Solutions is a well-known name in the industry, offering top-notch expertise in crankshaft grinding services. With a strong presence in Tanzania, they have carved a niche for themselves with their amazing services in crankshaft repair, grinding, polishing, and inspection.

When it comes to crankshaft grinding, RA Power Solutions stands as a trusted partner for a wide range of clients. Their experienced technicians possess extensive knowledge and experience in handling various types of crankshafts, be it from marine engines, industrial equipment, or power plants.

Crankpin After Grinding And Polishing

The company’s expertise in crankshaft repair is second to none. They employ advanced techniques and cutting-edge equipment to repair damaged crankshafts to their original specifications, providing the highest level of precision and performance.

For those seeking crankshaft polishing services, RA Power Solutions offers a seamless process that results in smooth, mirror-like surfaces on crankshafts. The particular approach adopted during polishing ensures improved performance and reduced friction, resulting in improved efficiency and longevity of the crankshafts.

Crankshaft inspection is a critical aspect of their services, reflecting their dedication to delivering top-tier quality. Through advanced inspection methods, including non-destructive testing & dimensional analysis, RA Power Solutions ensures that every crankshaft meets the strictest industry standards before being returned to its rightful place.

RA Power Solutions stands as a leading authority in crankshaft grinding and repair, polishing, and inspection. Their expertise, coupled with a customer-centric approach, has earned them the trust & loyalty of clients across various industries, making them the go-to choice for all crankshaft-related needs.

The Benefits of Choosing RA Power Solutions for Crankshaft Grinding in Tanzania

When it comes to crankshaft grinding and repair services, RA Power Solutions stands out as a trustworthy and efficient choice. With their expertise and specialized equipment, they deliver a range of essential services that ensure optimal performance & durability of crankshafts.

Crankshaft grinding is a crucial process for restoring the precision and smoothness of damaged crankshafts. RA Power Solutions boasts advanced grinding machinery & skilled technicians who can handle crankshafts of various sizes and designs. Their precise grinding techniques not only eliminate any surface irregularities but also help in restoring the original dimensions, leading to improved engine efficiency & reduced vibrations.

Another key service offered by RA Power Solutions is crankshaft repair. Whether it’s a minor crack or a major damage, their experienced team can effectively repair the crankshaft, saving clients from the cost of a full replacement. By employing state-of-the-art technologies & following industry best practices, they ensure that the repaired crankshafts recover their structural integrity, minimizing the risk of future failures.

RA Power Solutions also places significant emphasis on crankshaft inspection. A thorough inspection is crucial to determine any hidden defects or potential issues that could lead to catastrophic engine failure.

Choosing RA Power Solutions for crankshaft grinding, repair, polishing, and inspection in Tanzania brings multiple advantages. With their cutting-edge equipment & expertise, they ensure the highest quality standards are met, ultimately improving engine performance, increasing the longevity of crankshafts, and delivering customers with the peace of mind they deserve.

Crankshaft Grinding as a Preventive Maintenance Measure for Long-lasting Engines

Crankshaft grinding is a necessary preventive maintenance measure for ensuring the longevity & optimal performance of engines. In Tanzania, specialized services such as crankshaft grinding, crankshaft repair, crankshaft polisher, and crankshaft inspection are readily available to address possible issues with this crucial engine component.

Over time, the crankshaft can develop wear & tear due to constant operation, which can lead to inequalities and reduced engine efficiency. By utilizing professional crankshaft grinding services in Tanzania, engine owners can have their crankshafts restored to their original specifications, eliminating any irregularities and providing smooth rotation.

This process not only enhances engine performance but also prevents further damage to other engine parts, thus significantly extending the overall lifespan of the engine. Whether it’s a regular maintenance check or addressing a specific concern, relying on experienced professionals for crankshaft services in Tanzania is a smart investment for maintaining reliable, long-lasting engines.

Contact Us for Top-notch Crankshaft Grinding Services in Tanzania

Looking for top-notch crankshaft grinding services in Tanzania? Look no further than RA Power Solutions. We specialize in comprehensive crankshaft solutions, including crankshaft grinding, repair, polishing, and inspection services.

Our team of professional technicians is equipped with state-of-the-art machinery & years of experience, ensuring preciseness and efficiency in every project. Whether you require crankshaft repair, grinding, polishing, or inspection services, we have you covered.

With our commitment to quality and customer satisfaction, you can trust RA Power Solutions to deliver outstanding results for all your crankshaft requirements in Tanzania. For more information, please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.

FAQs

1. Do you offer on-site (in-situ) crankshaft grinding in Tanzania without removing the crankshaft?

Customers often need assurance that the grinding can be performed directly on-site—such as onboard vessels or at power plants—without dismantling the engine.

2. What size and weight capacity can you handle for crankshaft grinding?

Users frequently ask about the maximum diameter and mass of crankshafts that the service can accommodate, especially for large diesel engines (e.g., 500–700 mm diameter, up to 20 tons).

3. Do you provide crankshaft inspection and nondestructive testing before or after grinding?

Prospective clients want to know if inspections—like dimensional analysis and NDT—are included to guarantee quality and adherence to specifications.

4. Can you handle polishing or finishing to restore surface smoothness and reduce friction?

Many ask not only about grinding but also polishing services that ensure mirror-like finishes to improve engine performance.

5. Can you repair crankshafts with cracks or major damage instead of replacing them?

Customers are often interested in repair services for cracked or severely damaged crankshafts to avoid costly replacements.

The post Precision Crankshaft Grinding in Tanzania | RA Power Solutions appeared first on Rebabbitting Bearing.

Crankshaft Repair And Crankshaft Inspection

Raj — Tue, 19 Feb 2019 11:27:16 +0000

A crankshaft remains one of the most critical components in any diesel engine. When it fails, the ripple effects are costly, not just in parts but in downtime, loss of productivity, and unexpected breakdowns. That’s where RA Power Solutions steps in, combining decades of experience, advanced technology, and onsite availability to ensure crankshafts are repaired right, fast, and reliably.

In Situ Crankshaft Repair

What Makes RA Power Stand Out?

RA Power Solutions has experience of 47+ years in the field of repair of crankshafts, overhauling of high-capacity Diesel & major engine repair. The services extended by us are far better than the International standard and our service charges are the lowest in the world.

At RA Power Solutions, we understand the critical role that a crankshaft plays in the overall performance and durability of an engine. A properly functioning crankshaft is essential for smooth engine operation, power generation, and minimizing downtime. That’s why we offer comprehensive crankshaft inspection and crankshaft repair services to ensure the optimal performance of your machinery.

We have 24/7 availability of technicians with the necessary credentials & valid Indian CDC. They can travel to any destination in the world on short notice. We are the only company in the world that manufactures onsite crankshaft grinding equipment up to 700 mm & provides Crankshaft repair services as well. We have sold 70 onsite Crankshaft Grinding machines & have trained more than 150 technicians to undertake the repair of Crankshafts.

Stop availing of the crankshaft repair and Engine overhaul services from the local companies & avail the benefit of our experienced & low-cost services provided with the guarantee.

Core Services Offered:

Complete Calibration of Crankshaft diameter ranging from 30 mm to 700 mm. Inspection includes dimensional inspection of Crankpin & main journal, checking of hardness, Crack detection test with MPI, and surface roughness test. An inspection report in detail on our formats is prepared and submitted to our client.
Onsite grinding and Polishing of Crankshaft, maintaining the tolerances as mentioned in the maintenance manual of the engine manufacturer.
Straightening and Peening of Crankshaft.
Replacement of the Crankshaft in case of rejection.

Regular crankshaft inspection and timely repairs are crucial for maintaining the performance, reliability, and longevity of your engine. At RA Power Solutions, our experienced technicians and advanced equipment allow us to provide top-notch crankshaft inspection and crankshaft repair services.

MPI Inspection Test

With our onsite repair capabilities and expertise in crankshaft machining and grinding, we are the leaders in delivering comprehensive solutions to ensure the optimal performance of your machinery.

Trust us to keep your engines running smoothly and efficiently. Contact us today to schedule an onsite inspection of the crankshaft or discuss your crankshaft repair requirements.

For more information regarding onsite crankshaft inspection, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs:

1. What crankshaft sizes can RA Power Solutions repair?

They can machine and repair crankshafts with diameters up to 700 mm.

2. Do they provide onsite crankshaft grinding?

Yes, their team carries portable machines and performs grinding and polishing onsite.

3. How do they check crankshaft condition before repair?

They conduct crack detection, hardness tests, dimensional inspection, and surface finish measurement.

4. Can RA Power Solutions straighten a bent crankshaft?

Yes, they offer straightening and peening to restore crankshaft alignment.

5. What if the crankshaft cannot be repaired?

They arrange replacement of the crankshaft if repair is not feasible.

The post Crankshaft Repair And Crankshaft Inspection appeared first on Rebabbitting Bearing.