REPLACEMENT OF PARTS
Cross Feed Nut
Wind the cross slide forward until the nut comes off the screw
Loosen the locking screw and remove the nut
Transfer the locking pin and screw to the new nut
Insert the new nut in the cross slide
Engage the screw in the nut and wind the cross slide forward as far as possible
Back off one turn and tighten the locking screw.
Compound Rest Nut
Wind the slide back as far as possible. Use a "C" spanner to remove the compound
rest screw assembly.
Loosen the nut locking screw and remove the nut
Insert the new nut
Replace the compound rest screw assembly
Wind the slide fully forward
Back off one turn and tighten the locking screw
Cross Feed or Compound Rest Screw
(The same procedure can be used to eliminate wear on an existing screw)
The Screw Assembly is removed as one unit,
using a "C" spanner (Drawing M6 - Appendix B)
and then taken apart. If new parts are being
fitted, then they are substituted for the worn
parts.
When re-assembling a shim washer "A" of app.
0.03mm (0.0012") is placed between the
graduated collar and the face of the bushing.
The screw is pushed hard into the bushing, the
graduated collar pushed hard against the shim
washer and secured with the lock screw "B".
The shank of the screw is then gripped in a 3 jaw
chuck in a lathe and a light cut taken across the
face of "C". The shim is then removed and the
unit re-assembled and replaced.
When another lathe is not available to carry out this operation on the Cross Feed
Screw, clamp the cross slide by tightening one gib screw and use the compound
rest set at 90° to take the facing cut. When operating on the Compound Rest Screw,
clamp that slide by tightening one gib screw.
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