I then refaced the back plate and the dial gauge gave me a very nice zero read out, as in nothing. The center shaft required a small trim as well, otherwise the chuck was going to ride on it. Attachment 32077
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I then refaced the back plate and the dial gauge gave me a very nice zero read out, as in nothing. The center shaft required a small trim as well, otherwise the chuck was going to ride on it. Attachment 32077
With the recut of the back plate I saw a zero reading on the dial gauge in all areas! Plus I had also removed the problem with the 0.003" Taper error that I thought the gear head had?
Attachment 32079
Photo in post No 29 is The screwcutting gearbox,
I recut the alloy tube I have been using, this time the work was good and I have a lathe that I can trust now.
My thanks to all of those who have offered advice in this matter. Attachment 32081