The Metalock Engineering Group provides cost-effective crankshaft repairs involving re-machining, straightening and heat treatment services for all types of large diesel engines, at sea or on land anywhere in the world.
In accordance with the requirements of Lloyd's Register Metalock UK have been awarded the Lloyds accreditation (No MNDE/REP/0073/03) for the “In-Situ” annealing and re-machining of crankshafts installed in marine or land-based diesel engines.
Crankshaft failure can happen at any time, even on the best maintained engines, however it always happens at the most inconvenient time and always results in expensive downtime and loss of revenue - that’s why Metalock is here to help.
We have highly skilled orbital machining specialists located in all of our global service centres that can respond quickly to any emergency situation involving crankshaft failure, if there is any damage caused by the failure on the structure of the engine block we also can provide specialist cold Metalock repair technicians to repair the cracked components at the same time. All repair work is covered by Lloyds Class Approval.
Crankpin machining
You may or may not require the annealing process, however, it has been developed at the request of many customers. The aim is to reduce the hardness of damaged or heat affected crankpins journal diameters. The application is limited to one-piece forged crankshafts made of tempered steel that has not been surface hardened by induction hardening or nitriding.
Before heat treatment is undertaken the material specification, ideally, including the tempering process, must be known so as to ensure the annealing temperature used does not exceed that of the original tempering. After annealing the surface hardness of the annealed area must be within the range given by the original engine manufacturer.
All crankshaft re-machining is in accordance with our Metalock Engineering process description ‘Machining of crankpins’ and is to result in satisfactory surface finish within the original engine manufacturer tolerances. Final inspection includes magnetic particle inspection, surface hardness, dimension, run-out, surface finish and crank web deflection.
All readings reported and recorded for our customers quality records.
On land, at dockside or mid-ocean, Metalock skilled orbital machining technicians regularly help customers avoid the cost and inconvenience of back-to-workshop repairs. When every minute of downtime means lost revenue, in situ repair and maintenance services get the engine back into service as soon as possible.
In the mid-Atlantic or the world’s most inhospitable continental environments, experienced Metalock engineers are probably repairing a damaged crankshaft while you're reading this.
From marine propulsion to industrial power generation, our crankshaft reconditioning and crankpin machining service gives you valuable benefits:
Marine Crankpin journal machining
Just imagine the time and costs involved in a traditional back-to-base repair:
All the time the engine will be out of service and not making you money. Now, imagine the benefits of our cost-effective in situ repair (in place, on site or aboard ship), including minimised downtime and avoid expensive and untimely replacement costs. That’s why Metalock makes sense every time.
