Wartsila Crankshaft Grinding on Ship

About Wartsila Crankshaft Grinding on Ship

We were approached by a leading shipping company operating heavy container vessels for the problem faced by them due to the failure of the Crankshaft of Wartsila 12V32. The vessel was in the outer anchorage of Jebel Ali Port Dubai.

The Wartsila Engine details are as follows.

S. NO	Wartsila 12V32 Diesel Generator Details
1	Engine Make	Wartsila
2	Engine Model	12V32
3	Crank pin Diameter Standard	270 mm
4	Crankpin Bearing Width	93 mm
5	Place of execution of crankshaft repair	Jebel Ali Port Dubai to Galle port srilanka sailing

Action taken by RA Power Solutions to Repair Crankshaft of Wartsila 12V32

i) RA Power Solutions deputed two technicians to Dubai with a portable crankshaft grinding machine and instruments to inspect and execute the repair of Wartsila Crankshaft 12V32.

ii) On inspection the crankpin no. 6 having a standard diameter of 270 mm was found to be seriously damaged.

iii) On visual inspection it was observed that due to seizure of crankpin bearing the bearing material got embedded on the crank pin circumference.

iv) The bearing material was carefully removed from the crankpin.

v) Due to the seizure of the bearing the radius fillet of both the ends was damaged.

vi) The cracks were checked by MPI using high intensity Megnaflux torch. multiple hairline cracks were observed on damaged crankpin.

Action taken by RA Power Solutions to successfully repair of crankshaft of Wartsila 12V32

i) The above dimensional and inspection reports showed that the crankpin is seriously damaged as the radius fillet profile was also lost due to the accident.

ii) The main challenge was that the vessel sailing schedule was fixed for Galle Sri Lanka and the repair of the crank pin was to be executed while sailing of the vessel from Jebel Ali Port Dubai to Galle Port Sri Lanka.

iii) The execution Plan was finalised in consultation with the chief engineer of the vessel and grinding was started while sailing of the vessel.

iv) Due to the excessive damage of the crank pin and radius fillet of both ends our technicians have to undertake the grinding to the undersize of 2.0 mm.

v) The radius fillet of both ends was also repaired while sailing of the vessel.

vi) The final size of crank pin maintained after grinding was as following:

a) Minimum size of crankpin observed after grinding: 267.98 mm

b) Maximum size of crankpin observed after grinding: 268.00 mm

The above dimensions show that the crankpin was undersized by 2.0mm, taper & ovality was maintained within 0.02 mm which is far better then the wartsila tolerance stipulated in manual.

RA Power Solutions have been extending crankshaft repair services even while sailingof the vessel for the last 41 years.

We have multiple teams of fully trained technicians who can travel to any site/ vessel all over the world in short notice.

All our technicians have valid Indian CDC.

Onboard Precision Grinding for Marine Engines

Repair crankshafts at sea without removing them from your Wartsila engine. The portable grinder delivers exceptional surface finish and accuracy, making it ideal for main and auxiliary engine repairs done on-ship in challenging marine environments.


Superior Performance and Construction

Engineered from alloy steel, the grinder features built-in vibration dampers, a 400 mm diamond/grit wheel spinning at 1200 RPM, and up to 0.02 mm TIR alignment accuracy. It is lightweight for portability (120-200 kg as per setup) and comes with essential accessories, ensuring reliable onboard operation.


User-Friendly, Efficient, and Safe

Manual operation allows for precise control by just 1-2 skilled technicians. Heavy-duty transport cases, easy alignment tools, and custom-fit mounts make set-up simple and safe even in confined ship engine rooms or decks, providing versatile, ongoing engine maintenance.