A vessel having a main engine of DEUTZ SBV 12M 628 reported failure of the crankshaft. The vessel was at Claxton Bay Port, Port of Spain. RA Power Solutions technicians with a seamans book immediately flew to Trinidad and Tobago as the visa was arranged on arrival.
The details of the DEUTZ SBV 12M 628 are as follows:
| S. No. | Crankpin Details | |
| 1 | Engine Make | DEUTZ |
| 2 | Engine Model | SBV 12M 628 |
| 3 | Crankpin Diameter Standard | 175.00 MM |
| 4 | Crankpin Bearing Width | 146.00 MM |
| 5 | Grinding of Crankpin Number | #02 & #04 |
| 6 | Polishing of Crankpin Number | #01, #03, #05 & #06 |
| 7 | Place of Execution of Grinding of Crankpin | Claxton Bay Port, Port of Spain |
| 8 | Name of Shipping Company | Reputed Company from Trinidad and Tobago |
| 9 | Date Of Execution | 06.05.2026 to 21.05.2026 |
After inspection of all the crankpins, it was decided to grind crankpin numbers 02 and 04, and balance crankpin numbers 01, 03, 05, and 06, which were polished.
The following final dimensions were maintained:
| SIZE OF CR PINS AFTER REPAIR | |||||||||
| A | Aa | C | CC | B | Bb | Min | Maxi | Ovality | |
| CR-1 | 174.95 | 174.93 | 174.93 | 174.94 | 174.90 | 174.94 | 174.90 | 174.95 | 0.05 |
| CR-2 | 173.50 | 173.48 | 173.47 | 173.48 | 173.49 | 173.49 | 173.47 | 173.50 | 0.03 |
| CR-3 | 174.94 | 174.93 | 174.95 | 174.94 | 174.93 | 174.92 | 174.92 | 174.95 | 0.03 |
| CR-4 | 174.50 | 174.49 | 174.47 | 174.48 | 174.49 | 174.49 | 174.47 | 174.5 | 0.03 |
| CR-5 | 174.93 | 174.94 | 174.94 | 174.92 | 174.94 | 174.95 | 174.92 | 174.95 | 0.03 |
| CR-6 | 174.93 | 174.92 | 174.94 | 174.94 | 174.95 | 174.94 | 174.92 | 174.95 | 0.03 |
The undersized bearings have been arranged by the client, and the engine has been commissioned.
The above repair work on the DEUTZ SBV 12M 628 crankshaft was carried out successfully without removing the crankshaft from the engine. Precision grinding and polishing ensured that all crankpins were brought within acceptable limits with minimum ovality and proper surface finish. Following assembly with undersized bearings supplied by the client, the engine was commissioned successfully and is running satisfactorily.
For more information on onsite crankshaft repair, grinding of crankshaft, and crankshaft polishing, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.





Price:
Price 132000 INR / Unit
Minimum Order Quantity : 1 Unit
Weight (kg) : 40000 kg
General Use : Crankshaft Grinding
Color : Green
Magnetic Chuck Size : 1000 mm
Price 1700.0 USD ($) / Piece
Minimum Order Quantity : 1 Piece
Weight (kg) : Approx. 7500 kg
General Use : Crankshaft Machining for Marine Diesel Engine
Color : Other, Standard Grey / Blue
Magnetic Chuck Size : Custom Fit for MAN B&W 5L16/24
Price 2000.0 USD ($) / Number
Minimum Order Quantity : 1 Number
Weight (kg) : 9,800
General Use : Marine Engine Crankshaft Repair
Color : Other, Grey
Magnetic Chuck Size : 400 mm
Price 1650.0 USD ($) / Number
Minimum Order Quantity : 1 Number
Weight (kg) : Engine: Approx. 9,500 kg (varies as per build and casting)
General Use : Marine Crankshaft Repair and Overhaul
Color : Other, Industrial Green / Light Blue (as shown)
Magnetic Chuck Size : Not Applicable (servicing crankshaft in situ)