Thread adapter (1 1/8-10) for spindle

Give some consideration to making a chuck mount plate that uses the 1.125 x 10 threads. You will have
better accuracy without an adapter.
 
The inboard spindle is 1 1/2 inch.
I was thinking today, for the outboard spindle... it is 1 1/8 inch. The inboard spindle is 1 1/2 inch. So I have chucks that fit the 1 1/2. So if I could get an adaptor from 1 1/8 to 1 1/2 I would be all set. In the pic there is a collar with set screws, that is two inch with the thread 1 1/8 8tpi. So a collar two inches long, with inside 1 1/8 (8tpi) LHT, and outside 1 1/2 (8tpi) RHT, with 2 setscrews would fix me up.
Make sense?
Thanks, Charles
 
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