Thanks for the downloads. Looks like mine is 1939 Master Craftsman 12 inch screw cutting lathe. Looked on internet for 2 weeks and VERY minimal info, 1 post here and bingo. Great forum.
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Babbit bearing headstock max spindle rpm
- Thread starter Scubadave
- Start date
- Joined
- Mar 19, 2014
- Messages
- 2,681
Maybe not to worry about the highest speed it can go? But, what about that big and heavy chuck on it? How’s that babbitt bearing holding up next to the chuck?
And yes, the old Model T’s had rod and main babbitt bearings. And it was a “splash” oil system, no pump.
And yes, the old Model T’s had rod and main babbitt bearings. And it was a “splash” oil system, no pump.
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My question about max rpm is only so I set the a.c. drive up right as to NOT over do it. I am looking to get zero to fastest off of back gear pulley and 1 spindle pulley. The motor is a 3/4 hp 3450 rpm. Bearings after lube and adjust has .002-.003 run out. Stuck rod in chuck and gave a little tug with dial indicater on chuck toward front. I am guessing that's ok. If bearings were needed why can't clausen find anything but timken bearings when I give them model #. I forget who at moment but someone here gave 1939 catalog that shows this exact lathe and it says babbit bearings right in ad.. I don't claim to know anything but I try
.... Any advice is always appreciated.Sent from my VS995 using Tapatalk
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- Apr 23, 2018
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- 6,557
I have a 1937 10" with babbitt head. I put together a Timken head at one point, and decided to stick with the babbitt because it ran tighter on the test bar. I run it over the full range of sheaves without worry about overcooking anything. When set up, the bearings have very little play and will last as long as you don't do anything horrible to it. There is no replacement available, since babbitt has to be poured into the head with the spindle in one step and is now a lost art.
- Joined
- Jul 2, 2014
- Messages
- 7,594
The speed would be related to the bearing diameter. Start with that number and see what maximum speed machines with the same diameter bearings are running at. Or, if nothing else, interpolate. By saying size, I am really talking SFPM, which is probably what matters, that and what kind of oiling the bearings get and what kind of babbit it is.
A.c. drive? Do you mean a Variable frequency drive? If so its better to get a lower speed higher power motor and wind it out. There are some nice used ones on fleebay atm.My question about max rpm is only so I set the a.c. drive up right as to NOT over do it. I am looking to get zero to fastest off of back gear pulley and 1 spindle pulley. The motor is a 3/4 hp 3450 rpm. Bearings after lube and adjust has .002-.003 run out. Stuck rod in chuck and gave a little tug with dial indicater on chuck toward front. I am guessing that's ok. If bearings were needed why can't clausen find anything but timken bearings when I give them model #. I forget who at moment but someone here gave 1939 catalog that shows this exact lathe and it says babbit bearings right in ad.. I don't claim to know anything but I try.... Any advice is always appreciated.
Sent from my VS995 using Tapatalk
All ready own motor and vfd but still wondering about top rpm for those bearings. Previous post says dependant on bearing size , but doesn't give enuf info or formula to calculate. Unless it was assumed I know something I don't.
Sent from my VS995 using Tapatalk
Sent from my VS995 using Tapatalk