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Chuck for Philips Constant HD lathe

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David Buskell:
Hi Swake,

if in doubt, give Philips a call. Phone no and all contact details on facebook or their own web page.

David

Twisted Trees:
Phone number is +32 3 897 97 97

website http://philipsconstant.com/en

Email info@philipsconstant.be

swake:

--- Quote from: Duncan A on September 02, 2019, 01:45:31 AM ---Possibly M39 x 3.0mm?

--- End quote ---

Close but it is not 3.0. It really is 8tpi. This was confirmed with a thread pitch gauge.

Major diameter is 40.1 and that would mean M40 and make life easy, but the thread really is nothing metric and even should M40x3 fit it will not be snug.

1"1/2 is significantly smaller (38.1mm)
1"5/8 is significantly bigger (41.2mm)
40.1 mm is close to 1"9/16

A Philips Constant service guy answered my mail last week: they have nothing anymore about this machine (or he doesn't want to search for it)

I found another imperial thread. It is a mix as is the case with many machines of that era.

Twisted Trees:
That is unfortunate, possibility is that they just re-badge'ed someone else's lathe  and have no information anymore.

I take it that face-plate is screwed to the spindle? so that is a thread reference you could use to get an exert made that steps it to a common size. These don't list your size but offer custom made option. http://www.onewayeuropa.com/chucks/adaptors.htm

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