cleaning, the crankshafts are straightened to within .0015 run-out
end to end. The nose is checked for run-out and straightened if needed.
All threaded bolt holes are chased. Cranks also receive the Magnaglow
inspection at this station.
All crankshafts are precision ground to .010, .020 or .030 undersize.
We do a spark-out grind which helps assure a better finish on the
All crankshafts receive a two step polish to achieve a smooth mirror-like
finish for longer bearing life. All oil holes are chamfered.
At the final cleaning station all crankshafts have the oil holes brushed
out and all threaded holes, pilot holes and balance holes are brushed
cleaned with soap and water.
Final inspection by quality control checks for straightness of crank,
size of journals, thrust clearance and run-out on the nose, and brushes
oil holes again. Checks are also made to assure the part number and
sizes on the crank are correct.
After receiving a rust preventative coating, the crankshafts are sent
either to production, storage or to be packaged as a kit.