KO Lee B2062 Spindle Repair

The KO Lee B2062 grinder is a universal tool and cutter grinder.  It comes fitted with this grease lubricated and belt driven spindle capable of running up to 3,500 rpm.

CHALLENGE

This KO Lee B2062 spindle came in with severe endplay and it felt rough when spun by hand.  We also measured 20µ+ of run out in the taper when it arrived.  After a complete breakdown and evaluation, we noted that the bearings were contaminated with a dark brown sludge.  It was surprising to find that the spindle was assembled incorrectly. The pair of bearings were built in a tandem arrangement and the spring pack in the rear was just floating in the housing because there was no rear shoulder (snap ring).  There was also a spacer missing in the rear housing witch will determine the pre-load on the bearings.  Lastly, the ID taper had 9µ of run out when we remeasured it bare shaft.  No other dimensional deviations were noted for this repair.

SOLUTION

The following actions were performed on this KO Lee B2062 spindle:

• Clean, inspect overall dimensions
• Replace bearings and convert to sealed bearings
• Determine the angle of the ID taper
• Grind, chrome plate, and finish grind the taper to said angle
• Manufacture new spring pack spacer
• Purchase and install new snap ring for the rear housing shoulder
• Rebuild the spindle with the correct bearing arrangement

RESULT

After reassembly of all components, adjusting bearing preload, and undergoing break-in and testing procedures, this spindle passed our final quality inspection before being returned to our customer with a 1-year warranty.