can any of you please tell me how you get the lead screw gear off the
lead screw on a craftsman 109.20630 lathe? i've got the retaining
bolt out, and there seems to be nothing holding the gear onto the
shaft, but i can't get it off. the gear can be wiggled around a bit,
but doesn't pull off. i don't want to apply much force yet, in case
there's something i'm overlooking.

i assume the gear must come off somehow, since a threading chart i
looked at shows different gears on the screw for different
threading/turning conditions.

thanks!

If I remember correctly there is a collar on the shaft that the gear and a
small spacer fit on. The collar has two keys spaced 180deg apart. Once the
screw is out the gear and spacer should come off of the collar. The collar
is pinned to the end of the shaft. Depending on how it's currently geared
the spacer may be on the outside with the gear behind it or the reverse.

There's a pretty good image of the gears on one variety of that lathe near
the bottom of this page:

http://www.lathes.co.uk/craftsman/page4.html

You're right to be careful with it because those gears are not very stout.
If it's tough to get off you might want to use something thin to get as near
as you can to the shaft to pry it off. Maybe a hacksaw blade?

On 2nd thought, I believe there is a bracket mounted behind it that holds
other change gears, similar to the one pictured he

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=2575379507

It's locked on the outside of a collar the leadscrew shaft goes through and
is behind the gear. If you loosen the screw that clamps it on you can
probably use it to pull the gear off.

Best Regards,
Keith Marshall


"I'm not grown up enough to be so old!"


"drew j." wrote in message
om...
can any of you please tell me how you get the lead screw gear off the
lead screw on a craftsman 109.20630 lathe? i've got the retaining
bolt out, and there seems to be nothing holding the gear onto the
shaft, but i can't get it off. the gear can be wiggled around a bit,
but doesn't pull off. i don't want to apply much force yet, in case
there's something i'm overlooking.

i assume the gear must come off somehow, since a threading chart i
looked at shows different gears on the screw for different
threading/turning conditions.

thanks!

On 24 Nov 2003 21:25:25 -0800, (drew j.) wrote:

can any of you please tell me how you get the lead screw gear off the
lead screw on a craftsman 109.20630 lathe? i've got the retaining
bolt out, and there seems to be nothing holding the gear onto the
shaft, but i can't get it off. the gear can be wiggled around a bit,
but doesn't pull off. i don't want to apply much force yet, in case
there's something i'm overlooking.

i assume the gear must come off somehow, since a threading chart i
looked at shows different gears on the screw for different
threading/turning conditions.

thanks!

Typically those have a simple woodruff key in the shaft, and they
sometimes will bind or gall in the matching slot in the gear. If you
have a gear puller, or can make up one, get behind the boss where the
shaft comes through the gear and gently pull. Ive seen enough of those
gears put on, after the owner dropped the woodruff key in the swarf,
and used the bolt to hold it on, rather than the key to keep it from
turning, which over time tends to gall the shaft and inside the gear.
Dont pull on the outside of the gear..go as close to the shaft as you
can. Some of those are zinc and will bust in half if you pull out by
the teeth.

Unless someone has a better idea?

Gunner

"The British attitude is to treat society like a game preserve where a
certain percentage of the 'antelope' are expected to be eaten by the
"lions".
Christopher Morton