Information on Crankshaft Grinding Machine and Process

Every crankshaft requires grinding and polishing. We are giving below a few reasons for the requirement of crankshaft grinding and polishing:

  • Although crankshaft is manufactured out of forged steel 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 the main journal is undertaken.
  • Bearing line marks, 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 in case the bearing line marks and pitting are observed.
  • Seizure of bearing on crankpin or main journal of the crankshaft is common. In a few cases, the bearing material gets embedded on the crankpin and main journal diameter, crankshaft grinding, and polishing are recommended to remove the bearing material and to control the taper, ovality, surface finish, and other parameters strictly as per the engine manufacturer’s recommendation.

Applications of Crankshaft Grinding Machine

In order to attend above defects in the crankshaft, it is obvious that the 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 today’s 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 the case of large crankshafts say 5 meters in length and above, even as of date there are a number of countries that don’t have facilities of bench-type crankshaft machining as it needs heavy investment, highly skilled manpower.

RA Power Solutions have developed a portable, light-weight, easy to operate onsite crankshaft grinding machine having the following features:-

Introduction of state of art crankshaft grinding machine

  • The onsite crankshaft grinding machine introduced by RA Power Solutions about 2 decades back is in real terms technological innovation. It has outdated heavy-duty bench-type crankshaft machining. Numbers of manufacturers of crankshaft grinding machines in Italy, Germany, and other countries have closed down the crankshaft machining manufacturing facilities.
  • The machine mainframe is manufactured out of titanium alloy which has the inbuilt property of absorbing vibrations. This is of great benefit as the grinding and polishing of crankpin machining and the main journal of the crankshaft is possible even while sailing the vessel.
  • Compact and lightweight of machine facilitates to transport it to any site in the world by air as accompanied baggage, the machine is designed in such a way that its total weight is kept to a minimum which is easy to handle and costs less in transportation.
  • The machine is designed and capable to achieve closed tolerances strictly as per the manufacturer’s 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.
  • The machine is operated either by a pneumatic turbine or electric motor depending on the customer choice.
  • Presently the machine is available in the range from 35 mm to 700 mm.
  • Training and maintenance is an important part of our company sales policy. We extend training on dummy crankshafts in our workshop or even at the client’s premises.
  • The cost of equipment is of great importance in this time of recession, shipping and industries, in general, are going through.
  • The cost of machine is negligible in comparison to the heavy-duty bench-type stationary crankshaft machining.
  • More than 70 machines are sold all over the world and technicians have been trained for the maintenance and operation of the machine.

The crankshaft grinding machine is recommended for onsite crankshaft reconditioning, crankshaft polishing without removal of it from the block; it is possible to undertake grinding and polishing of any cylindrical shaft having a diameter up to 700 mm irrespective of bearing length which can be as high as 600 mm or above.

Crankshaft Grinding Machine Exporter

Companies these days are going for crankshaft grinding machine which is portable and can be taken to the site for crankshaft repair. It is not practical and financially feasible to remove the crankshaft from the main equipment, pack it and send it to the workshop for repair. This is a difficult process, especially for the heavy-capacity engines which are installed on a vessel or in diesel power plants.

The introduction of a crankshaft grinding machine which is portable and can be taken to the sites is proved to be a blessing to the vessel owners and the heavy engineering companies who do not have 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 up to 700 mm which is portable, lightweight, and easy to operate. Surprisingly, the cost of the onsite crankshaft grinding machine is negligible in comparison to the conventional bench-type crankshaft machining available in the market.

Crankshaft Grinding Process

The machine is very handy and can be easily operated for the crankshaft grinding process.
This blog is written by Mr. Raj Shahani (Managing Director of RA Power Solutions). He has forty years of experience in the field of engine repair and is a technical adviser to various shipping and heavy industries based all over the world.

For more information on crankshaft regrinding, engine crankshaft grinding machine, grinding machine of crankpin, crankshaft machining and polishing contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or  +91 9810012383.