Subject: Newbie problem with 3-jaw chuck

From: "Curt Hagenlocher" <[email-masked]>
Date: 16 Dec 1996 15:53:53 GMT

I've got a Sherline lathe and I'm having problems with the 3-jaw chuck.

Specifically, I don't seem to be able to hold anything (anymore).  No
matter how much I clean the surfaces and tighten the chuck, the
piece I'm working on almost invariably begins to slip into the headstock.
This is particularly a problem during facing.  It hasn't been a problem
while turning steel, but it has while turning brass.

I'm sure that the jaws are tight enough; I've left fairly deep grooves in
some 12L13 steel I was working on :-).

I don't think that this happened at first (although I was using smaller
pieces then), and it's worth pointing out that I once removed and put
back the jaws of the chuck, and lord knows what I screwed up.

Any suggestions?

--
Curt Hagenlocher
[email-masked]

---

From: Jim Harvey <[email-masked]>
Date: Mon, 16 Dec 1996 13:30:20 -0500

> back the jaws of the chuck, and lord knows what I screwed up.

Curt:

I have not encountered this problem before. Did you ever disassemble the 
chuck? ( to turn the jaws from outside to inside?) make sure you have 
jaw A, B, C in their proper locations.

If all else fails, return the chuck to SHERLINE and have them check it 
out. If there is a problem you are under warranty and the chuck will be 
replaced.

Please let me know how you make out.

Jim Harvey
[email-masked]
http://hre.com

---

From: [email-masked] (Chuck Sherwood)
Date: 16 Dec 1996 19:48:30 GMT

>> This is particularly a problem during facing.  It hasn't been a problem

If you are gripping things to the point of denting them, your chuck
sound plenty tight. Let me ask an obvious question. Are your tools sharp??
Which technique are you using for facing? A left hand tool fed from the
outside in works the best for me.  You can use a RH tool starting at the
middle and working your way out, but I have had this push the piece in,
particularly if the tool is not sharp or set correctly.
My 2 cents worth.

-- 
--
Chuck Sherwood
[email-masked]