Information About the Crankshaft Grinder

Crankshaft Grinder
Crankshaft grinding machines look very similar to a lathe. They have both a head and tail stock. They also have ways and chucks. Besides the large grinding wheel, the most notable difference is the ability to offset the chucks. This offset is needed to accommodate the stroke of the crankshaft. There are counter-weights on the grinder that allow the operator to balance the crankshaft when grinding the rod journals.

The Grinding Process

Grinding the crankshaft is a relatively straight-forward process. The crankshaft nose is placed into the head stock chuck and the crankshaft flange (in some cases the crankshaft seal surface) is secured in the tail stock chuck. At which point the main journals can be ground. The rod journals are ground after the machine is set to the proper stroke and after the counter weights are set. After the crankshaft is ground, the oil holes are chamfered and deburred. Then, the crankshaft is polished with a fine grit belt to achieve a satisfactory micro finish.

For reverse rotation marine applications, the crankshaft is reversed in the machine and then ground. This helps to achieve a better finish for reverse rotation motors. The goal is to extend bearing life and make the break in period as smooth as possible.

Please contact us if you have any questions regarding crankshaft grinding.
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