Ball Bearing, PFPE, Edwards, EH Booster, QMB Blower, Part# 20403010K

This is not a standard bearing you can buy at any hardware store. This is a vacstellar ball bearing that comes pre-lubricated with PFPE oil . PFPE stands for Perfluoropolyether. It is a special type of lubricant made for tough conditions .

PFPE lubricant is different from regular grease. Here is why it matters:

• It works in a vacuum – Regular oil would evaporate. PFPE does not.

• It handles high temperatures – PFPE works in extreme heat.

• It resists chemicals – PFPE does not break down when exposed to harsh gases.

• It keeps things clean – No vapor or contamination inside your pump.

Edwards holds patents related to using PFPE lubricants in vacuum pump bearings . This is the real thing.