[4]

Craftsman/Atlas change gear question

[3]
[10] Like what you see?
Click here to donate to this forum and upgrade your account!

ARC-170

Active Member
Registered
Joined
Oct 17, 2018
Messages
133
Likes
23
#1
I have a Craftsman 101.07403 lathe that did not come with a set of change gears. Do the Atlas 618 and Craftsman 101 use the same gear set? There are many sets on Ebay and I want to make sure I'm looking at the correct ones. They don't all have the exact set of gears I need, but they are close. Some have too many, some have all except one. I don't want to buy a set and then find out they won't fit. The sellers don't always put the number of teeth or the hole size, either.

For example:
https://www.ebay.com/itm/9-Pc-Craft...h=item2cdf8ae585:g:GG4AAOSwe9Fb8f3p:rk:4:pf:0
 

markba633csi

H-M Supporter - Gold Member
H-M Supporter - Gold Member ($25)
Joined
Apr 30, 2015
Messages
2,961
Likes
1,535
#2
Yes they are the same. The 10" and 12" lathe gears are different and have a larger bore
 

wa5cab

Downloads Moderator
Staff member
H-M Platinum Supporter ($50)
Joined
Dec 25, 2011
Messages
4,344
Likes
1,069
#3
Correction or clarification - The Atlas and Craftsman 6" lathes use the same change gears. And the Atlas 10" and Craftsman 12" use the same change gears in the same years. The 6" gears are smaller than those on the 10"/12" and don't interchange with either version of the 10" and 12" lathes.

The Atlas 9" and 10" up through 10D use the same gears as the Craftsman 9", 101.07360, 101.07380, 101.07400, 101.07361, 101.07381 and 101.07401.

At Atlas 10F and Craftsman 101.07362, 101.07382, 101.07402 the gears were changed. All of the later gears are suffix A. Both gear sets have a 3/8" face or gear tooth width. The early gears have a 3/8" hub length (same as the face). The later suffix A gears have a 1/2" hub length (wider than the face). The later gears can be modified to the earlier spec by facing off 1/16" from each side. But the later gear set does not include a 96T gear. However, you do have the two 96T gears on the machine, so that shouldn't be a problem. The same "A" suffix gears were used on all later Atlas 10" and 12" and Craftsman 12" lathes up through March, 1981 when production ceased.
 

ARC-170

Active Member
Registered
Joined
Oct 17, 2018
Messages
133
Likes
23
#4
Correction or clarification - The Atlas and Craftsman 6" lathes use the same change gears. And the Atlas 10" and Craftsman 12" use the same change gears in the same years. The 6" gears are smaller than those on the 10"/12" and don't interchange with either version of the 10" and 12" lathes.

The Atlas 9" and 10" up through 10D use the same gears as the Craftsman 9", 101.07360, 101.07380, 101.07400, 101.07361, 101.07381 and 101.07401.

At Atlas 10F and Craftsman 101.07362, 101.07382, 101.07402 the gears were changed. All of the later gears are suffix A. Both gear sets have a 3/8" face or gear tooth width. The early gears have a 3/8" hub length (same as the face). The later suffix A gears have a 1/2" hub length (wider than the face). The later gears can be modified to the earlier spec by facing off 1/16" from each side. But the later gear set does not include a 96T gear. However, you do have the two 96T gears on the machine, so that shouldn't be a problem. The same "A" suffix gears were used on all later Atlas 10" and 12" and Craftsman 12" lathes up through March, 1981 when production ceased.
1. Just out of curiosity, what is not interchangeable? The axle hole diameter, the keyways, the number of teeth, or...?

2. I didn't see my 101.07403 listed in your post. I found a set of change gears that was listed as fitting a Craftsman/Atlas lathe. The teeth count matched what I needed and the holes had the 2 keyway notches. My part list has the "A" suffix on the gear part # and the ones I bought match that.

3. I don't have a 96 tooth gear, either. Where would that be? I don't see one listed on the parts diagram.
 
[6]
[5] [7]
Top