The crankshaft is a vital component in any engine, particularly in high-capacity marine, industrial, and power plant engines, where its cost can be substantial. Worldwide, there are only a limited number of manufacturers capable of producing heavy-duty crankshafts for large engines, compressors, pumps, and other rotary equipment. Proper maintenance of these crankshafts is essential to extending their operational life and minimizing costs.
With over 46 years of experience in crankshaft repair, RA Power Solutions has successfully saved more than 10,000 crankshafts from potential rejection. This accomplishment has been possible through educating ship owners, power plants, and operators via global conferences, publications, and blogs, highlighting the importance of proper maintenance of crankshafts.
Maintaining crankshafts is straightforward, and you can significantly increase their lifespan by following these key steps:
1. Visual Inspection of the Crankshaft:
Regular visual inspections are crucial. Inspect the crankpin and main journal caps periodically by opening them, focusing on the radius fillet on both sides, checking the lubrication oil hole, and ensuring the crankpin/main journal diameter has no scratches or rough surfaces.
2. Routine Polishing of Crankpin and Main Journal:
Polishing the crankpin and main journal regularly can prolong the life of both the crankshaft and bearings. Modern onsite polishing machines make it quick and efficient to polish crankpins within hours.
3. Crankshaft Grinding:
If you detect taper, ovality, or rough surfaces, you must grind the crankshaft to restore it to its original dimensions. Technicians perform this grinding process onsite without removing the crankshaft.
4. Oil and Filter Changes:
Following the manufacturer’s guidelines for regular oil and oil filter changes is essential to preserving the crankshaft and bearing lifespan.
How RA Power Solutions Can Assist in Crankshaft Maintenance
RA Power Solutions, with 46 years of experience, offers lightweight and portable onsite crankshaft polishing and grinding services, making it possible to perform maintenance at any location worldwide.
Our onsite crankshaft services allow for polishing and grinding to be completed in just a few hours, offering a cost-effective preventive measure. RA Power Solutions, a globally recognized company, offers onsite crankshaft services for diameters up to 700 mm. We also manufacture customized onsite crankshaft grinding machines to suit specific site requirements.
For more information on crankshaft maintenance and how to extend the life of your crankshafts, feel free to contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.
FAQ
It depends on your usage and OEM guidelines, but scheduling visual checks during every overhaul or every 1,000–2,000 operating hours is a good baseline. The blog emphasizes inspecting radius fillets, oil holes, and surfaces to catch early scratches or rough patches.
Absolutely. The blog notes that regular polishing of crankpins and main journals—using modern onsite equipment—can significantly prolong both crankshaft and bearing life, often completing the job within a few hours .
When you find taper, ovality, deep scratches, or surface roughness on the journals, you must grind them to restore them to OEM dimensions. Onsite machines handle this process efficiently without removing the crankshaft. The onsite machines can handle this without crankshaft removal .
Technicians can complete most onsite polishing or grinding jobs within a few hours—dramatically reducing downtime compared to traditional workshop methods that require crankshaft removal and transport.
Their portable equipment supports crankpin diameters from roughly 35 mm (some sources say 30 mm) up to 700 mm, accommodating a wide range of engines—from industrial and marine to power-plant units .
