It is obvious that every crankshaft requires grinding and polishing. We are giving below few reasons for the requirement of crankshaft grinding and polishing:
Although crankshaft is manufactured out of forged steel but due to continuous running it is observed that crankpin and main journal of crankshaft develop taper and ovality more than the limits specified by the engine manufacturer. For removal of excessive taper and ovality there is no option, but to go for grinding of crankshaft or in case the ovality is not excessive, polishing of crankpin and main journal is undertaken.
Bearing linemarks, pitting and rough surface is observed. The reason can be poor quality of lubricating oil used,non-replacement of lubricating oil filters on time, poor quality of bearings etc. The crankshaft polishing is recommended incase the bearing linemarks and pitting is observed.
Seizure of bearing on crankpin or main journal of crankshaft is common. In few cases, the bearing material gets embedded on the crankpin and main journal diameter, crankshaft grinding and polishing is recommended to remove the bearing material and to control the taper, ovality and surface finish and other parameters strictly as per the engine manufacturer recommendation.
Applications of Crankshaft Grinding Machine:
In order to attend above defects in crankshaft, it is obvious that crankshaft grinder machine is required to undertake grinding and polishing of crankpin and main journal. In older times when the technology was not developed to the today level, the owners had no option but to disassemble the crankshaft from the engine, pack it and send it to the designated workshop for repairs. In case of large crankshafts say 5 meters length and above, even as on date there are number of countries that have no facilities of bench type crankshaft grinding machine as it needs heavy investment, highly skilled man power.
Introduction of state of art crankshaft grinding machine:-
The machine main frame is manufactured out of titanium alloy which has the inbuild property of absorbing vibrations. This is of great benefit as the grinding and polishing of crankpin and main journal of crankshaft is possible even while the sailing of the vessel.
Compact and light-weight of machine facilitates to transport it to any site in the world by air as a accompanied baggage, machine is designed in such a way that its total weight is kept to minimum which is easy to handle and costs less in transportation.
Machine is designed and capable to achieve closed tolerances strictly as per the manufacturer recommendation. It can execute grinding and polishing of crankshaft of all engine manufacturers and can meet with their stipulated parameters in terms of taper, ovality, surface finish, parallelism etc.
Presently the machine is available in the range from 35 mm to 700 mm.
More than 70 machines are sold all over the world and technicians have been trained for maintenance and operation of the machine.
Crankshaft Grinding Machine Exporter
The introduction of crankshaft grinding machine which is portable and can betaken to the sites is proved to be a blessing to the vessel owners and the heavy engineering companies who do not have the crankshaft grinding and crankshaft polishing services in their country and have no option but to either send the crankshaft to the third country or replace it by the new one costing exorbitantly.RA Power Solutions Pvt. Ltd. manufactures crankshaft grinding machine upto 700 mm which is portable,light-weight and easy to operate. Surprisingly, the cost of the onsite crankshaft grinding machine is negligible in comparison to the conventional bench type crankshaft grinding machines available in the market.