0 morse taper

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0 morse taper

This topic has 15 replies, 8 voices, and was last updated 30 April 2015 at 08:15 by Neil Wyatt.

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28 April 2015 at 20:10 #188021
blackcat smith
Participant
@blackcatsmith57530
I m looking for a short 0 mt drill arbor for a very small lathe..doesnt really matter what thread as long as there is likely to be a drill chuck to fit
Tried putting this in wanted classifieds but it kept askingvfor a valid price..Are ££ not valid anymore..
I know Cowells do one for £30 and I might be a bit optimistic about finding one for less! Thank you
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28 April 2015 at 20:10 #32479
blackcat smith
Participant
@blackcatsmith57530
arbor
28 April 2015 at 21:37 #188030
Andrew Hutchinson
Participant
@andrewhutchinson12802
Sherline?

Part Number 11890 is 3/8-24 MT-0 . Costs about $10USD. I've been using mine with the decent little Jacobs chucks sold through Sherline and Taig. Another thought to keep total costs reasonable would be second hand Jacobs multi-craft chucks you're likely to come across at garage sales and the like. I've made a pusher to knock them apart from seized condition. Done a half dozen so far and only one's not playing along. Average cost has been about $2 bucks CDN. One of them is actually very true – as good as the one's sold through Sherline , etc. though I don't know how long it will last in that condition. I believe it is a "Sheffield" rather than a "Hartford" though to be honest I can't say that there is any difference amongst the rest of the lot.

Usual disclaimers,

Andrew Hutchinson
28 April 2015 at 23:33 #188035
Roderick Jenkins
Participant
@roderickjenkins93242
I think the Sherline products use a full 0 Morse taper. The picture shows a full 0 MT in a short 0 MT Flexispeed tailstock. Unfortinately rather too much overhang to be useful.

Cheers,

Rod

Edited By Roderick Jenkins on 28/04/2015 23:51:56
29 April 2015 at 00:02 #188037
Andrew Hutchinson
Participant
@andrewhutchinson12802
Ah, picture's worth a thousand words… I should have noted the OP was same as before. Best of luck in the search.

Cheers,

Andrew Hutchinson
29 April 2015 at 00:53 #188039
steve de24
Participant
@stevede2433577
Both the Cowells and the Sherline use half length 0MT tapers. The difference being that the Cowells use the thin end of the taper (from 6.4mm dia to 8mm dia) while the Sherline uses the fat end (from 8.1mm dia to 9.2mm dia). A full 0MT taper in the Cowells tailstock looks like Rod's photo.
29 April 2015 at 01:09 #188040
steve de24
Participant
@stevede2433577
Foe a drawing of the Sherline 0MT taper take a look at **LINK**
29 April 2015 at 08:50 #188046
blackcat smith
Participant
@blackcatsmith57530
Thank you ..you ve all been very helpful..Still looks like a ?30 one..ha ha ….!
29 April 2015 at 10:30 #188060
Robert Dodds
Participant
@robertdodds43397
Blackcat,
take a look at RDG ebay 0MT arbour with 3/8 x 24 thread / 0MT 9.95 . The only shortcoming is if you rerequiring the thin end of 0MT. I did and had to taper turn the arbor between centres but it is soft and free cutting so a decent finish is no problem. 3/8 x 24 thread is standard for some small drill chucks in 1/4 6mm size. I got mine of an old Bridges pistol drill.

Bob D
29 April 2015 at 11:44 #188071
blackcat smith
Participant
@blackcatsmith57530
That was my main problem -altering one but I had no idea steel like that was soft enough to turn
29 April 2015 at 12:03 #188073
Robert Dodds
Participant
@robertdodds43397
Its centres that are hard, for obvious reasons. But arbours or arbors are soft, to do your own thing with them !

Bob D
29 April 2015 at 14:42 #188096
steve de24
Participant
@stevede2433577
Blackcat,

I use a Jacobs drill chuck with a 3/8 inch x 24 tpi thread mounted on a 0MT arbour on my small Cowells lathe and I'm very happy with it..

However can I suggest that if using a commercially produced arbour requires you to re-cut the taper (so that the threaded end is close to the that part of the taper which fits into the tailstock) then don't bother. Assuming you don't have a taper turning attachment, the difficult part of the job is setting the lathe up to cut a well fitting taper (not so much difficult as fiddly trial and error requiring a lot of patience). Having put the effort in to cut a good fitting taper then I'd make my own arbours, in fact I'd make a lot from 5/8 and 3/4 dia steel bar (or whatever meets your needs). I'd also make some from smaller diameter silver steel for future use as extra centres.

The total cost of the material, plus the cost of a 3/8 inch x 24 tpi die, will be about the same as the commercially produced arbour.

What lathe do you have?

Steve
29 April 2015 at 15:04 #188099
Peter Hall
Participant
@peterhall61789
I have a Perris lathe which takes the same tooling as the Cowells. I made my own tapers, but used my Myford to do so. I have a regular length 0MT dead centre which I use as a reference to set the topslide angle with a dial gauge. Not too difficult, and once I got it right I turned loads of blanks for the Perris (thin end) and my Sherline (fat end) some in mild steel and some in silver steel.

Pete
29 April 2015 at 23:12 #188156
blackcat smith
Participant
@blackcatsmith57530
This gets more fascinating all the time .my lathe is a 1950s home made one by my Grandfather, I inherited it in 1969 and just started using it! Its actually quite a good little machine which is why I want to go further with it.No idea of manufacturer ,not even a number on it..I ll put a photo on one day ..Only use phone most of the time dont think thats possible..
30 April 2015 at 01:12 #188159
Enough!
Participant
@enough
I've never been really happy with those 3/8-24 threaded chucks. There seems to be no provision for maintaining any kind of concentricity other than the thread itself. OK perhaps for hand-held drills but for machine use I prefer a JT.
30 April 2015 at 08:15 #188167
Neil Wyatt
Moderator
@neilwyatt
I've never been really happy with those 3/8-24 threaded chucks.

I have a smashing 1/4" capacity Jacobs one and it has ~3/16" deep counterbored register before the thread so I turned a mandrel to match on an MT2 arbor and it works loverly.

Neil
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