|ronan walsh||21/04/2015 22:38:26|
|542 forum posts|
A chap on another forum i am on just bought a little used colchester lathe, it did not come with tool holders, just the central toolpost (dickson type). Anyway he bought a few and a conversation developed about why there are tool holders available for the dickson system that have a morse taper hole rather than a slot to clamp a tool.
As a turner myself i have never had the need to hold a mt tool anywhere but the tailstock, and have never come across them in any workplace i have been.
Anyone know what is the intended use of these tool holders ?
5467 forum posts
Also on another forum this has been discussed. They allow MT drills and other tooling to be power fed using the carriage. The value of this then got discussed with some doubting its efficacy and others recounting how they had used it in practice.
1808 forum posts
Multifix do a morse taper holder to go along with their toolposts.
I would think they would have to be used carefully as I would imaging if used for drilling they would have to be dead on center with both axis and height or they would snap the drill bit in half a heart beat.
Edit :- Just read up on them and it seems that some boring bars are an MT taper holding fit for which they are intended.
Edited By Nick_G on 22/04/2015 03:08:17
|John Haine||22/04/2015 04:19:17|
|3334 forum posts|
Cnc gang toolholder?
|Nigel McBurney 1||22/04/2015 09:42:25|
741 forum posts
My 2mt Dickson holder came with my first Colchester,it is useful to be able to drill off the saddle when working on large batches of tough material,I also mount an old tapping head in the 2 mt holder, the tapping head with its ability to grip taps without slippage makes tapping easy and also it reduces the use of the tailstock,a lot of lathes are ruined by worn out tailstocks, Some precision toolroom lathes eg Holbrook had precise saddle attachments for drilling and a plate on the tailstock engraved " do not drill from the tail stock" A lot of precision plain lathes have relatively small tapers in the tail stock,to prevent the tailstocks being ruined by the use of large drills .
|Mark Simpson 1||22/04/2015 11:26:44|
|86 forum posts|
There are/were MT boring bars available which (I think) is what the holders were designed for... There is a through hole for a draw bar/bolt.
One such from Myford Ltd of Fleabay http://www.ebay.co.uk/itm/like/111209588912
Edited By Mark Simpson 1 on 22/04/2015 11:31:22
|Jesse Hancock 1||28/04/2015 11:13:23|
|314 forum posts|
I thought I'd revive this thread to ask: Is there a difference between a Morse Taper adapter (Say mt 3 down to 2mt) or will all morse tapers fit within one another?
Briefly I want to be able to use my tooling for mt 2 from Micro mill and use it with the mt 3 Mini mill.
|Jon Gibbs||28/04/2015 11:30:42|
|739 forum posts|
You definately need adaptors, all of the tapers are slightly different ... **LINK**
|Jesse Hancock 1||28/04/2015 11:51:58|
|314 forum posts|
That's the site I was looking at but I just got more and more confused trying to figure out what gusinta what.
So you think I need a three to two then (adapter) and Bobs your uncle. Thanks Jon.
|Neil Wyatt||28/04/2015 12:29:51|
18232 forum posts
You need a 2 to 3 (which is like a sleeve) rather than a 3 to 2 which is a big socket on the end of a small taper.
Edited By Neil Wyatt on 28/04/2015 12:30:08
|Jesse Hancock 1||28/04/2015 12:53:52|
|314 forum posts|
Ok so I order a 2 to 3 so the outside fits the morse in the Mini and the tools I have fit inside that.
Thanks Neil I'll take the plunge as all I need now is a site that knows the difference.
Is this your lunch break Neil?
|Dennis R||28/04/2015 20:33:01|
|51 forum posts|
An open ended adaptor 2-3 MT would be better so that the draw bar passes through to hold the tooling.
This one an OPS1 also has an ejection ring.
Got mine from Chronos, just a satisfied customer.
|997 forum posts|
I would expect the MT tool holder to accept a tang MT so that drills can be slapped in with no rotation just like a tail stock. If that's the case drawbar may not go through to accept Dennis picky above intended for spindles with through hole.
Do have open ended MT 2-3 sleeves some where never used them. No good for MT drills they require a tang type MT and cant be ejected in the Harrisons and Colchesters tail stock without a strip down. Better off buying specific MT2 or MT3 tooling to suit.
Need more MT2-3 and MT1-3 tang type you can never have too many.
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