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Post by rodwilson on Jan 5, 2009 17:55:44 GMT
Are there collets on the market or preferably s/h, other than new from Cowells, that would fit my Cowells ME lathe. The spindle is 14mm x 1mm with an 0 taper.
What exactly should I be looking for?
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Post by petercolman on Jan 6, 2009 20:29:45 GMT
You could make a spindle nose adaptor and use ER collets.
Peter
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Post by rodwilson on Jan 7, 2009 12:37:07 GMT
Thanks. I'll look into that. Expanding on my first post I was wondering if I could do something with say 8mm watchmakers collets usually available on ebay.
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Post by AndrewP on Jan 7, 2009 20:36:04 GMT
As I have recently acquired a Cowells 90ME with just a 3 jaw chuck I have been wondering along the same lines.
RDG Tools often list parts with the 14mm x 1 nose thread but I haven't seen collets for the 0 morse taper.
I think the Unimat 3 & 4 used the same nose thread so that is worth following up perhaps but I don't know what, if any, taper the Unimat had.
RDG currently have a 45mm 4 jaw on a 0 morse taper mount for under £60 which is £100 less than the Cowells item which admittedly fits the nose thread so is more versatile.
Andy
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Post by spamcanman on Jan 8, 2009 19:30:00 GMT
Only the later Cowells have the 14x1 spindle all the early ones have 14x1.5 thread so make sure what one you have. I think you will find on the Unimat lathes they could be the older courser thread 14x1.5 type  |
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Post by AndrewP on Jan 9, 2009 13:35:13 GMT
Thanks for the warning, mine is indeed 14 x 1 so must be later.
The little Sieg C0 has the same 14 x 1 nose thread but a slightly larger register (15mm as opposed to the Cowells 14mm).
Arc Eurotrade have been advertising an ER16 collet chuck to fit the C0 via a backplate although I couldn't find it on their site today, 'twas under £20 I seem to recall ;D
I've seen a further reference to Unimat 3 and 4 having the correct thread and also the same 14mm register so that could well be an avenue to pursue.
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Post by rodwilson on Jan 9, 2009 18:15:56 GMT
Very good point spamcanman my machine is the 1.5mm thread. Pays to measure and not just read the spec! ER16s on a backplate may be an option but the smallest collet, I've seen, seems rather large at 3/16".
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jasonb
Elder Statesman
Posts: 1,246
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Post by jasonb on Jan 9, 2009 20:06:35 GMT
ER 16s can be bought down to 1mm and will hold slightly smaller.
Jason
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