I found these machinable blank end Morse arbors, MT 1 with a 7/8"dia.
x1-1/8" blank area which can be useful for making tooling/adapters etc.

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WB
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"Tom Gardner" mars@tacks wrote in message
...
I have my high-speed spindle, a drill quill made to run 10k rpm. However,
it has a M-1 male taper that holds a 1/4" Jacobs chuck. I need to mount a
6" x 1/16" x 7/8" AH cut-off disk. Is there a commercial adapter or do I
have to make something?