Main Bearing Journal Repair
Main Bearing Journal Repair
4-Stroke Engines, 2-Stroke Engines and Compressor shafts are all areas in which In-Situ are world leaders and offer an unrivalled service. Vast experience gained through innovation, investment, R&D and field trails allow In-Situ undertake the most complex Crankshaft machining projects in the shortest time possible.…
In-Situ provide the most technologically advanced equipment and In-Situ Main Bearing Journal Grinding techniques, gaining the worldwide reputation as shaft, journal and Main Bearing specialists. Our highly skilled and motivated Engineers offer a precision on-site, on-board and off-shore Crankpin machining service led by a dedicated and experienced management team. Damage to Crankshafts can vary in severity depending upon a variety of factors. In-Situ can supply services for the analysis of the damage and rectification of both the main Journals and the Crankpins.
The service include an annealing process to reduce hard surfaces as high as HB 750 on one piece forged steel Crankshafts that have not been induction hardened or nitride. Our advanced Main Bearing Grinding service is offered to all sectors of industry including, Power generation, marine, steel production, petrochemical, offshore oil & gas, transportation, food production and defence. We work closely with OEM’s achieving the high tolerance demands required by these manufacturers.
Main Bearing Grinding Process
Failure Assessment & Inspection
The process includes multiple services in which the severity of a failure or condition of the main bearing Journal is assessed. This allows a plan to be put in place for Grinding operations to take place. The process may include all or some of the following services: Crack Detection, Hardness Testing, Geometric Tolerance Checks, Run Out Checks and Exploratory Grinding.
A specially manufactured grinding machine is utilised to grind the Journal to remove any damage or wear and restore OEM specified tolerances to the diameter, radii and oil holes.
Superfinishing & Polishing
A process in which a specialist piece of equipment holding a carborundum stone oscillates from side to side around 30 times a second to flatten off the surface of the main bearing journal after the grinding process. The journal is then polished to restore the OEM specified surface finish.
Annealing of the Crankpins can be undertaken to reduce heat induced hardness within the journal that is above OEM specification. This service is undertaken via a resistance heat treatment method in which a process of controlled heating, soaking and cooling of the effected Journal with ceramic blankets is undertaken.
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