Stuart,
I was recently given a very used diff carrier, and tried a similar way as you to ensure accurate results.
I turned a mandrel in the lathe to a good fit in the bush unfortunately the bush must not have been concentric, it proved too far out to continue.
I then realised that if I turned a bore to fit the a/c bearing seat in a piece of bar it would guarantee to hold it accurately. Having another carrier with 0.020” runout I used that and faced the crown wheel seating area, also the adjoining faces of both halves of the carrier. I machined as little as possible of each face.
After assembling the parts I then replaced the carrier in the mandrel and supported the other bearing so that I could measure the run out.
The reading was taken at 90degree intervals on the circumstance, three readings were 0.000” one was 0.004”.
This measurement was taken quickly as it was late in the day so will check again tomorrow.
Thank you again for prompting me to try this method.
Roger
I was recently given a very used diff carrier, and tried a similar way as you to ensure accurate results.
I turned a mandrel in the lathe to a good fit in the bush unfortunately the bush must not have been concentric, it proved too far out to continue.
I then realised that if I turned a bore to fit the a/c bearing seat in a piece of bar it would guarantee to hold it accurately. Having another carrier with 0.020” runout I used that and faced the crown wheel seating area, also the adjoining faces of both halves of the carrier. I machined as little as possible of each face.
After assembling the parts I then replaced the carrier in the mandrel and supported the other bearing so that I could measure the run out.
The reading was taken at 90degree intervals on the circumstance, three readings were 0.000” one was 0.004”.
This measurement was taken quickly as it was late in the day so will check again tomorrow.
Thank you again for prompting me to try this method.
Roger
Location:- Haverfordwest, Pembrokeshire.