machinist@lists.ibiblio.org

Subject: Machinist

List archive

[machinist] Morse taper draw bar to tang - capscrew in end of MT2-arbor-for-drawbar for lathe tailstock bump out

From: Lawrence London <lfljvenaura@gmail.com>
To: machinist@lists.ibiblio.org, Lawrence London <avantgeard@gmail.com>, Lawrence London <lfljvenaura@gmail.com>
Subject: [machinist] Morse taper draw bar to tang - capscrew in end of MT2-arbor-for-drawbar for lathe tailstock bump out
Date: Sun, 9 Jun 2019 15:05:36 -0400

https://www.practicalmachinist.com/vb/general/morse-taper-draw-bar-tang-148009/

Morse taper draw bar to tang - capscrew in end of MT2-arbor-for-drawbar for lathe tailstock bump out and other useful information

Thread: Morse taper draw bar to tang

12-20-2007, 12:45 PM #1

neilca
Aluminum

Join Date
Jul 2007
Location
Marietta, GA
Posts
53
Post Thanks / Like

Likes (Given)
0
Likes (Received)
0

Morse taper draw bar to tang

I purchased a set of chucks for my lathe. The have a #2 MT and are made to use a drawbar, 3/8-16. I want to use them without the draw bar in the tailstock. However if I were to put them in the tail stock I am afraid I will never be able to remove them because they are missing the tang that bumps on the back of the tailstock when it is retracked fully.

Before I start making these threaded tangs I thought I would post to see if there is a source where I can buy them. Anybody know of such a product?

Thanks,
neilca

Reply With Quote
12-20-2007, 01:57 PM #2

starbolin
Stainless

Join Date
Mar 2007
Location
Far Northern California, USA
Posts
1,290
Post Thanks / Like

Likes (Given)
264
Likes (Received)
138

If a socket head cap screw doesn't work then a piece of all-thread cut to the right length should do the trick.

Reply With Quote
12-20-2007, 02:00 PM #3

bikebuilder
Stainless

Join Date
Feb 2007
Country
UNITED STATES
State/Province
Montana
Posts
1,004
Post Thanks / Like

Likes (Given)
5
Likes (Received)
41

Put it in 'soft' and see if it pops out when retracted.... might work anyways.

bb

Reply With Quote
12-20-2007, 04:42 PM #4

neilca
Aluminum

Join Date
Jul 2007
Location
Marietta, GA
Posts
53
Post Thanks / Like

Likes (Given)
0
Likes (Received)
0

Bike builder,
I tried putting it in soft. It would not come out. I used a piece of metal on the outside to limit the travel of the chuck and it came out. I guess I could use a fork like device on the outside and hope it doesn't come off the chuck taper side.

Starbolin,
Good thought, not as pretty as a screw in tang but effective.

Thanks,

Reply With Quote
12-20-2007, 08:22 PM #5

tattooed_machinist
Cast Iron

Join Date
Feb 2007
Location
Coquitlam, BC, Canada
Posts
373
Post Thanks / Like

Likes (Given)
0
Likes (Received)
0

those tapers are ment for a jig bore

chuck up some MS, turn a 3/8 thread on one side and turn a nice little stub turn dia to same thickness of a reg morse#3 tang)

put some mild lock-tite on the threads and screw them into your tapers with a pipe wrench (bingo, screw on tang)

alot more professional than a shitty peice of ready rod....you could even do the same with some 4140 and harden it with a torch...whatever rocks your boat eh

Reply With Quote
12-20-2007, 10:38 PM #6

Carl Darnell
Titanium

Join Date
Jun 2006
Location
Taylorsville Ky
Posts
3,122
Post Thanks / Like

Likes (Given)
0
Likes (Received)
32

neilca, starbolin had the way to make them work. If you put a 3/8" cap screw long enough to have the hand wheel pop the taper out you can use them in the tail stock. You don't have to locktite them in because you may want to use the drawbar with them.

BTW, they are not called collets, they are called end mill holders or drill holders. If you use a drill in them you will have to grind a flat on the drill shank to keep them from spinning. As a matter of fact anything you use in them will have to have a flat under the set screw to keep it from spinning.

[machinist] Morse taper draw bar to tang - capscrew in end of MT2-arbor-for-drawbar for lathe tailstock bump out, Lawrence London, 06/09/2019