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RC Glossary


New to the RC Hobbies? What does buggy, bulkhead, nitro mean in radio control car hobbies? Check out the glossary for remote control cars below.

Bearing Seal -- Bearing Shield -

A 'washer' that rides between the bearing races, designed to pretect the bearing balls from contamination, or to prevent oils or pressure from passing through the bearing. Not all bearings are sealed (or shielded). Bearing seals come in 3 basic styles:

(1) METAL - Metal bearing shields offer the least seal protection, but spin more freely compared to other seals. These are commonly found in drivetrain components, such as hub carriers, where protection from dirt and debris is needed but reduced friction is desired.
(2) RUBBER - This offers the best seal of all bearing shields, but increases friction and drag in the bearing. Rubber sealed bearings are commonly found supporting the crank journal in nitro engines (a.k.a. front bearings). Here, they help prevent pressure and fuel from exiting the crankcase through the bearing.
(3) TEFLON - Teflon is the all around bearing shield - striking a compromise between the sealing ability of rubber and the free spinning ability of metal shields. Teflon shielded bearings may be found anywhere that a shielded bearing is needed.
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