Onsite grinding of crankshaft was executed by RA Power Solutions’ Technicians of Auxiliary Engine Number #02 of MAN B&W 5L 16/24. The details of the engine and crankshaft are given below:
| S. No. | Crankpin Details | |
| 1. | Engine Make | MAN B&W |
| 2. | Engine Model | 5L 16/24 |
| 3. | Crankpin Diameter Standard | 130.00 MM |
| 4. | Crankpin Bearing Width | 56.00 MM |
| 5. | Place of Execution of Grinding of Crankpin | Kandla Port, India |
| 6. | Name of Shipping Company | Reputed Company from Dubai, UAE |
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The Auxiliary engine number #02 of MAN B&W 5L 16/24 was stopped due to low air pressure, two of our technicians boarded the vessel and inspected the crankshaft. All Five (5) crankpins having a standard diameter of 130.00 MM had ovality ranging from 0.10 MM to 0.40 MM, which is considered to be on the higher side. The crankpins also had bearing line marks, rough surfaces, and localized damage, as the engine was operated in spite of the problem in the crankshaft.
The dimensional Report of crankpins is pasted below:
| SIZE OF CR PINS BEFORE REPAIR | |||||||||
| A | Aa | C | Cc | B | Bb | Min | STD & 1.5 &1.00 MM
U/S |
Ovality | |
| CR-1 | 129.80 | 129.94 | 129.90 | 129.79 | 129.75 | 129.62 | 129.62 | 130.00 | 0.38MM |
| CR-2 | 128.45 | 128.42 | 128.46 | 128.40 | 128.47 | 128.45 | 128.40 | 128.50 | 0.10MM |
| CR-3 | 129.80 | 129.83 | 129.75 | 129.70 | 129.73 | 129.60 | 129.60 | 130.00 | 0.40MM |
| CR-4 | 129.87 | 129.85 | 129.85 | 129.77 | 129.91 | 129.90 | 129.75 | 130.00 | 0.25MM |
| CR-5 | 128.95 | 128.97 | 128.90 | 128.94 | 128.9 | 128.95 | 128.90 | 129.00 | 0.10MM |
The hardness and MPI for crack detection was conducted and no abnormality was observed. Technicians started onsite grinding of crankpins were ground ranging from 1.0 MM undersize to 1.50 MM.
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The main advantage of onsite crankshaft grinding jobs executed by RA Power Solutions is that the technicians and equipment are trained and designed to execute the job even while sailing of the vessel. There was absolutely no requirement of holding of the vessel. RA Power Solutions also supplied the undersized crankpin bearings for this engine and it was commissioned in a short notice.
RA Power Solutions with experience of more than 44 years extends onsite crankshaft grinding services to leading shipping companies, power plants and heavy industries all over the world.
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For more information regarding crankshaft grinding services, please contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.