Low Temperature, High Vacuum Bearings
Low Temperature, High Vacuum Bearings
(OP)
Hi All,
I'm having a hell of a time finding a supplier of low temp high vacuum bearings with lead times under 14 weeks. Does anyone know of a good supplier? Basic (flexible) requirements:
Temp: -100C to 50C
Vacuum: to 10^-7 Torr
Radial load: 100 lbf
Outgassing: NASA spaceflight requirements (<1% TML, <0.1% CVCM)
Any suggestions you have are greatly appreciated!!!
I'm having a hell of a time finding a supplier of low temp high vacuum bearings with lead times under 14 weeks. Does anyone know of a good supplier? Basic (flexible) requirements:
Temp: -100C to 50C
Vacuum: to 10^-7 Torr
Radial load: 100 lbf
Outgassing: NASA spaceflight requirements (<1% TML, <0.1% CVCM)
Any suggestions you have are greatly appreciated!!!





RE: Low Temperature, High Vacuum Bearings
RE: Low Temperature, High Vacuum Bearings
If not would all ceramic ball bearings fit the bill? No lub. or plastic parts.
RE: Low Temperature, High Vacuum Bearings
I did some mechanical systems design work on the Shuttle program and the typical radial ball bearing used for mechanisms located in the payload bay was 440C race/ball material. These were standard catalog instrument type bearings, except that we would solvent clean and re-lubricate them with a low-temp vacuum grease like Braycote 600EF. If we needed a shaft seal to keep the grease from migrating we would use PTFE Omniseals, provided the shaft surface speed was low.
A standard 440C instrument ball bearing with an OD under 1.0" should easily handle a 100lbf radial load. There are dozens of companies that offer such standard catalog ball bearings, so it should be no problem to obtain a small quantity in less than 14 weeks.
Hope that helps.
Terry
RE: Low Temperature, High Vacuum Bearings
Mark