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How much workhead spindle deflection could i expect Landis ch 12 X 36 OD grinder

lalatheman

Hot Rolled
Joined
Nov 17, 2002
Location
Western ,Oh ,usa
When i put an indicator on a dead center workhead spindle with the ROTATION LOCKED OUT,

and pushed on the deadcenter with my hand a moderate push i estimate 12 or

15 pounds I got 1.5 thou......

Then tightened up the outer bearing lock nut in the back very tight and it went to a half thou..

This didnt seen too good...for locked rotor.

( When I push the same ammount on the tailstock center I get zero deflection)

Deassembling I find two pairs of angular contact bearings ...dont really know but I think a

pair of ac

bearings is designed for preload by spacing between the pair , not by wrenching the shaft nut

tighter?

Wondering if the inside edge of the outer race of the outer pair could be lapped down a bit?

I Think there is a tight fit in the casting ,I will be checking that next

Thanks
Dave
 
Last edited:
Deasembled every thing looks/feels and fits wonderful. This things built like an artistic

masterpiece. Deflection with an even harder shove than before is a quarter of a tenth...I am happy to live with

that for now.....



Dave
 








 
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