Re: [CAD_CAM_EDM_DRO] 5c spindle

Yes, Timken bearing may be run at 5000 RPM. However, the basic load rating
of the bearings as well as the bearing life would be reduced accordingly.

Based on the info in the Timken catalog I have, running the bearings at 5000
RPM would reduce the dyanamic load rating by 50%.

Actual life of the bearing will depend on the size bearing used as the life
factor for every bearing combination is different.

Smoke

>I built two application-specific lathes with "5C-only" spindles, for using

5C

>collets AND the 5C-backplate 3-jaw chuck from Sherline. They were made

from

>4142 annealed (still hard!), and I used double-row angular-contact
>double-sealed/shielded ball-bearings on the "nose end" and ABEC-7

single-row

>DCC bearings on "left end". Lotsa work and $$, but fine stuff! OH: These
>were for 3600 RPM ONLY; I have NO recommendations for metalworking,

variable

>speed. Perhaps tapered rollers better for that. No clue. Lotsa luck!

Jan

>Rowland
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