Newbie With A 6" Lathe And Motor Issue

The M6-20 came on the original 618 and was only made for a year or two. I've never seen an M6-20A, although there may have been one. The 101.07301 parts lists that have survived call for an L9-20A. All of the actual 618's and 101.21400's that I have seen photos or parts lists of have the M6-20B. So whichever of the countershaft brackets you have is original to the lathe depends upon which lathe you have and in the case of the 618, what year it was made.

Could you upload a photo of the bracket that mounts to the side of the lathe? It has never been clear how it did so or what it mounted to. The only photos of it that I have ever seen are all taken from the front of the lathe, and don't show how the bracket mounts.
 
mine just bolts straight on to the side of the bed using 2 tapped holes. There are 2 vertical slots on the countershaft bracket that allow for some vertical adjustment. I don't have my camera to hand, but I can take some pictures if you want. It's not super interesting though :)
 
If it's on a 6", it would be of some interest as none of the 15 or so different Atlas built 6" lathe parts lists that I have over the years turned up show anything other than L9-20A or M6-20B. Both of which attach to the bench.
 
My previous post should have said M6-20B instead of M6-20A. I'm assuming that is the proper one since since my lathe doesn't have the tapped holes for the M6-20.

I've attached some photos of the M6-20 bracket. It doesn't have the countershaft hanger assembly with it. It looks like the same hanger would work for either bracket.

image.jpg image.jpg image.jpg
 
T.J.,

Thanks. Comparing parts lists that we do have, it appears probable that the hanger assembly off of the 101.07301 would fit. The hanger casting on it is M6-21, whereas the one shown on all of the 618 parts lists that we actually have is M6-21A. They are all probably post-WW-II.

The M6-20 Countershaft Bracket looks more like it would bolt to the bench than to the back of the lathe. It is very similar to the L9-20A shown on all of the 101.07301 parts lists.
 
here you go Robert
IMG_4266.JPG IMG_4267.JPG

no idea if that set up is normal or if a previous owner drilled and tapped those holes. I didn't check the part no. as it's a bit of a pain to get to and it was cold last night :)
 
OK. Thanks. I believe that is original to the early 618. The catalog photo now makes sense. See catalog page from November, 1937.

Note that motor is mounted behind the countershaft assembly.

Do NOT click the red box for Full Size.

Atlas Cat 1937 No 28 P13.jpg
 
cool! Thanks for the info.

On mine the motor is to the left of the headstock to allow the fan mounted to the treadmill motor to spin in the right direction. Mounted behind the countershaft would have had it spinning backwards and thus considerably less effective.
 
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