Re: [atlas_craftsman] 109 backplate and chuck
- email@... wrote:
> First I need to say thanks for all the great info! Here's a toughThere are some one-piece chucks which do not have a backplate.
> one. I would like to get my 109-2063 running but I can't find a
> chuck for it. Can someone tell me what the relationship between a
> back plate and the chuck is? I'm starting school and would like to
> have my lathe available. Any suggestions on where I could aquire a
> back plate and chuck. Can I modify something new to work on my old
> lathe. Any response would be appreciated. Thanks in advance.
Many chucks for the lathes with threaded spindles use a backplate
between the chuck and spindle. If you have a face plate, you can
use it to machine a backplate out of any suitable material. if you
don't have a faceplate, then you need a backplate that is big enough
to mount the chuck, and has the correct spindle thread to mount
on the spindle. Then, once the backplate is mounted on the spindle,
to face the front off smooth, and cut any register required fro the chuck.
Then, you mount the chuck to the backplate and use a transfer punch
to mark the holes for the bolts that secure the chuck to the backplate.
You drill and tap these holes, and generally use socket head cap screws
to mount the chuck to the backplate.
If you cannot get a backplate that already has the correct spindle thread,
then you will have to cut the thread on the lathe. It is about a 1/2 hour
job. Travers, MSC, J&L, KBC, Quad Tool and others sell blank backplate
castings for this purpose.
- I would strongly suggest that you pursue either of the options mentioned in
earlier posts about either Sherline or Taig chucks, rather than using a back
plate. You really don't want to hang a chuck very far out on the 109's half
inch dia. spindle. Both the Sherline and Taig chucks are small and short,
so they minimize overhang. The Sherline is more expensive, so I went with
the Taig, and it has been completely satisfactory. I wasn't aware of the
3/4-16 to 1/2-20 adapter, so made my own adapter on the lathe. I would
suggest you try that also, in case your spindle is bent. Mine was out
enough to put a .030 wobble in a bar chucked in the 1/2 inch Jacobs chuck
that came with my lathe (measured right at the chuck jaws, about 3" from the
spindle flange could cut a great taper!). If you have a dial indicator,
check the spindle runout ( best would be to check it on the MT#0 inside
taper, or if you have a dead center, on it.) If there is any perceptible,
You should probably make an adaptor. It has been described several times in
earlier posts. In my case, I had a 1 inch bar that i cut off and hand filed
as flat and square on the end as I could, then drilled and tapped the 1/2-20
inside thread. I threaded it onto the spindle, then cut the 3/4-16 thread on
the lathe. My first threading project!
----- Original Message -----
Sent: Sunday, September 02, 2001 2:02 AM
Subject: [atlas_craftsman] Re: 109 backplate and chuck
> --- In atlas_craftsman@y..., email@p... wrote:
> > First I need to say thanks for all the great info! Here's a tough
> > one. I would like to get my 109-2063 running but I can't find a
> > chuck for it. Can someone tell me what the relationship between a
> > back plate and the chuck is? I'm starting school and would like to
> > have my lathe available. Any suggestions on where I could aquire a
> > back plate and chuck. Can I modify something new to work on my old
> > lathe. Any response would be appreciated. Thanks in advance.
> Tiag makes a very nice 4- jaw chuck with 3/4"-16 thread & a adapter
> 3/4"-16 Thread TO 1/2"-20 to thread onyo your Lathe total cost about
> $60.00 You must order directly from TAIG to get the adapter. I have
> been using mind for about 8 months now, with no problems.
> Mike in
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