23-06-2019, 08:57 AM
(This post was last modified: 23-06-2019, 08:59 AM by Stuart Giles.)
I have skimmed a couple of A7 diffs that had runout on the Crownwheel face. To do this I turned up a couple of top hat shaped plugs to be a close fit in the halfshaft bores. these were centre drilled at the flange end of the top hat. With the plugs fitted in the halfshaft bores, the diff was mounted between centres in a lathe. The diff being driven at the headstock by a lathe dog mounted on the bearing boss.
As long as the halfshaft bores are concentric to the bearing bosses, after machining, this will deliver a true running crownwheel mounting face. Chucking one end in a three jaw or similar self centreing chuck is likely to contribute some runout even if a fixed steady is used at the tailstock end.
As long as the halfshaft bores are concentric to the bearing bosses, after machining, this will deliver a true running crownwheel mounting face. Chucking one end in a three jaw or similar self centreing chuck is likely to contribute some runout even if a fixed steady is used at the tailstock end.