Mystery Taper

This topic has 3 replies, 3 voices, and was last updated 23 March 2020 at 22:50 by not done it yet.

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23 March 2020 at 20:40 #27222
Brian H
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@brianh50089
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23 March 2020 at 20:40 #459204
Brian H
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@brianh50089
Just looking through a collection of lathe tools in a box and found an adaptor that holds 2 MT. The problem is that I don't know what the outside taper is despite trawling through numerous tables.

The large diameter is approx. 1.435", small dia is 0.795" and the distance between them is around 1.250"

Does any one have an idea what the name of the taper is? The adaptor is clearly professionally made but has no marking on it.

Brian
23 March 2020 at 22:31 #459220
David George 1
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@davidgeorge1
It sounds like a taper for a headstock to allow a center to be fitted into the headstock for turning between centers. Possibly Harrison 4.5 Morse OD.

David

Edited By David George 1 on 23/03/2020 22:33:53
23 March 2020 at 22:50 #459226
not done it yet
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@notdoneityet
How accurate were your approx measurements? From the ‘net, NMTB Series have a 16 degree (32 degrees included angle).
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