On-Site Crankshaft Grinding Machine | Crankshaft Polishing Machine

Crankshaft grinding machines are designed to maintain the accurate tolerances as per the engine manufacturer’s recommendation

Generally, it is observed that even for the higher diameter of crankpin and main journal of the crankshaft the tolerances do not exceed more than 0.05mm in order to achieve such close tolerances of crankpin and main journal of crankshaft RA power designs and manufactures on-site crankshaft grinding machine which has the capability to maintain the close tolerance of even 0.01mm/0.02mm which is far better than the close tolerance specified by the engine manufacturers.

The on-site crankshaft grinding machine and crankshaft polishing machine manufactured by RA power solutions has the following features:

    1. Crankshaft grinding machine is designed in a way that it can be inserted from the inspection window of the engine block thus there is no need of removal of the crankshaft from the engine block.

    2. In case of space restrictions, RA power has the capability to design the equipment according to the space available on site for grinding or polishing of crankshaft/turbine/alternator shaft/rotor shaft etc…

    3. The on-site crankshaft grinding machine is lightweight portable and can be easily carried to the site all over the world. The crankshaft grinding  machine is packed in the suitcase and is carried as accompanied baggage accepted by all international airlines

    4. The main body of crankshaft grinding equipment is manufactured out of titanium alloy which is lightweight and can absorb the vibrations this feature of crankshaft grinding machine facilitates RA power technicians to undertake crankshaft repair on board the vessel while it is sailing, maintaining the close tolerances within 20 microns.

    5. Crankshaft grinding machine designed and manufactured by RA power can presently work up to 700mm diameter which we are in process of extending up to 1000mm.

Conclusion

RA power has sold more than 70 crankshafts grinding machines all over the world which are performing satisfactorily the cost of the machine is low and is affordable for repair workshop, shipping company, power plants etc…

 Crankshaft grinding machine for repair and grinding
Crankshaft grinding machine for repair and grinding
Crankpin grinding on board the vessel
Crankpin grinding on board the vessel
Crankshaft Grinding Machine for Small Diameter
Crankshaft Grinding Machine for Small Diameter

 

Crankshaft Straightening

It is generally observed that in case of failure of crank pin bearing or Main journal bearing, crankshaft loses its alignment. The alignment of crankshaft and its straightness is of great importance. The crankshaft alignment is specified by the manufacturer according to the crankpin diameter,main journal diameter length of crankshaft etc.

Crankshaft Straightening Process of MAN Diesel Engine
Crankshaft Straightening Process of MAN Diesel Engine
Crankshaft Straightening
          Crankshaft Straightening

In case there is a loss of crankshaft alignment, it is observed that main journal bearings fail repeatedly.

RA Power Solutions Pvt. Ltd. undertakes straightening of crankshaft as per the manufacturer’s specifications onsite by peening process. The technicians are experienced and trained to correct the loss of alignment of crankshaft by peening process. The crankshaft is straightened by peening process to the maximum extent and the final correction is done by grinding of main journals incase required.

Crankshaft

Grinding of Crankshaft by Crankshaft Grinder
Grinding of Crankshaft by Crankshaft Grinder

It is observed that due to seizure of bearing in most of the cases, crankshaft loses its alignment and develops bend. The alignment of crankshaft is important and it is maintained at the time of machining/grinding of crankshaft.

RA Power Solutions undertakes straightening of crankshaft onsite irrespective of the length of crankshaft, diameter of CR pin and main journal. The straightening of crankshaft is done by peening procedure for which our technicians are trained. Number of jobs has been successfully executed for straightening and onsite grinding of crankshaft.

Crankshaft Grinding
Crankshaft Grinding in Process