Needed: Atlas Model 3996 Lead Screw

B

bobby light

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Like the title says, have an Atlas 12" Model 3996 Lathe and it has a bent lead screw. Looking for a replacement.

Thanks.

Here is the Lathe

IMG_1156_zps105ea260.jpg
 
Ebay is your best bet. You may be able to straighten it. If you have a couple of V-blocks and a press.
 
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Is that the same diameter/thread as the 10" models?

Charles
 
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Should be. I was understood a lot of the 10" parts will fit 12". But the I'm just a newbie.
 
I put two beds together on my 12" Craftsman lathe and needed a lead screw 8' long. Bought a piece of 3/4" acme threaded rod, cut the 1/8" keyway, did some minor machine work on both ends and it worked great. Did have to do a little straightening on it too.
 
All Atlas built 10" and 12" lathes Model 10D or 101.07402 and earlier have 5/8" dia. lead screws threaded 5/8"-8. All Model 10F, 101.07403 and 3965 and later have 3/4" dia. lead screws threaded 3/4"-8.

The lead screw on the 3996 is 49-9/16" LOA. It is also 3/4" dia. all the way to the left end. The ones on the Atlas 10F, the Atlas 12" models up through 3991 and Craftsman models from 101.07403 up through 101.28910 are 5/8" dia. at the left end. The 3/4" dia. lead screws on the earlier 12x36 models can be converted to fit the last version 12x36 (or 12x24) by cutting off the f/8" dia. portion. According to what I have been told by several owners, the 10" 3/4" diameter lead screw's 3/4" diameter portion is 5/16" too short to convert.
 
Pops said:
I put two beds together on my 12" Craftsman lathe and needed a lead screw 8' long. Bought a piece of 3/4" acme threaded rod, cut the 1/8" keyway, did some minor machine work on both ends and it worked great. Did have to do a little straightening on it too.
Click to expand...

Well, it's just not nice to say something like that and fail to include a picture. :grin:

What sort of work do you do with such a long bed? Are you into pole vaulting?
 
I had several 1" diameter shafts that were 6' long that my customer needed turned down a few thousands and polished up. Since then I've done quite a few of those pieces for him. Do have pics that I need to put on here.


Sent from my iPhone using Tapatalk
 
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