Bearing speed ratings
Bearing speed ratings
(OP)
I have a project that requires taking an unused Monarch lathe that was built with single speed headstock and increasing the speed. Originally it was built for a 200HP DC motor on the input at 2000rpm. I need to put a 50HP AC motor that is 6000rpm on the input. I am concerned about the speed ratings of the bearings in the headstock. The headstock is lubricated with oil that is pumped to various points. The bearings are Timken but Timken have not been helpful. The Timken numbers are:
cup 394A
cone 390 class 2
cup 39520B
cone 39580 class 2
Please advise..
cup 394A
cone 390 class 2
cup 39520B
cone 39580 class 2
Please advise..





RE: Bearing speed ratings
Do you have a drawing of the headstock innards ?
RE: Bearing speed ratings
Yes I have the innards on paper.
RE: Bearing speed ratings
RE: Bearing speed ratings
How can I get it to you?
RE: Bearing speed ratings
Lester Milton
Telford, Shropshire, UK
RE: Bearing speed ratings
A link was provided which answered the question.
Although that thread applied to needle bearings, it was the same manufacturer. Don't know if it has your answer but I figured I'd mention it.
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RE: Bearing speed ratings
to get fax number send e-mail to dtimberlakeATamsuperDOTcom
remove AT and replace with @
remove DOT and replace with .
RE: Bearing speed ratings
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RE: Bearing speed ratings
Yes, it is I.
After a Google ego search I have determined I may be the DTimberlake that wastes time online, or naively leaves his indentity unprotected.
You may have noticed I still like to hear/see myself talk.
RE: Bearing speed ratings
1 - it’s easier to ask dumb questions that way
2 – you never know when you will be called to court for normal work related stuff and the lawyers could search internet posts to find opportunities to destroy your credibility.
Sorry to blow your cover. Feel free to red-flag my post to get rid of it.
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