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608PG Plastic Ball Bearing 8x22x7 Glass Balls

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608PG Plastic Ball Bearing

Key Features

608PG is a Plastic Miniature Ball Bearing made with Chemical Resistant Polymer and features polymer glass balls. These glass balls allow the 608PG to have high corrosion resistance, are lightweight and are much quieter while running when compared to their steel ball counterparts. 608PG is manufactured to have open sides and is pre-lubricated with grease to allow it to be ready for use upon delivery. Our 600 Series Bearings have Larger OD which assists in high speed & larger load application.

Match Numbers / Interchange Numbers

 A608-6 , P608 , GP608 , AP08 , 608PG , BB608-A500 GL

Applications / Industries

608PG Miniature ball bearings are used in a range of applications from Medical Equipment to Underwater Technologies, Chemical Lab Equipment, Valve Applications in Medical Devices, Instrumentation Gauges, Pumps, Water Treatment, Roll-on Applicators, Textile technology, and many More.

What are Ball Bearings?

A ball bearing is a type of rolling-element bearing that uses roller balls to separate two “races,” or bearing rings. The combination of the roller balls and bearing rings help to reduce surface contact and rotational friction across moving planes to accommodate axial loads.

Ball bearings help to facilitate motion by distributing loads and reducing friction for applications that have a high-speed requirement, ultimately aiding in extending the working life of your equipment.

What are Rolling-Element Bearings?

Rolling-element bearings, commonly called rolling bearings, are bearings that carry a load by utilizing “rolling elements” between two concentric, grooved rings called races. The motion of the bearing races allows for the rolling elements to move with very little resistance and with little slide variance.

Some common types of rolling elements include ball, cylindrical, spherical, barrel, needle, spindle, or tapered.

What is the Difference Between Open, Shielded, and Sealed Rolling Bearings? 

The main difference between open and sealed/ shielded bearings is the application of lubrication. The main difference between sealed and shielded bearings is the presence of a protective enclosure.

  • Sealed and shielded bearings are both lubricated with oil or grease in the bearing factory. However, a rubber sealed bearing protects the bearing by using a seal that contacts the inner and outer race. This provides superior protection at the cost of operating speed and temperature.
  • Open bearings are meant to be lubricated in place, with periodic reapplication of lubrication, based on use.
  • Shielded rolling bearings contain an enclosure that helps to protect the working parts of the bearing from environmental debris that may be introduced and would otherwise reduce the ball bearing speed and lifespan. This metal shield is stamped onto the bearing and only contacts the outer ring, this allows for protection without sacrificing operating speed or temperature.


Dimensions & Material
Inner Diameter:
Outer Diameter:
Chevron SRI-2 Grease
Delrin Plastic with Glass Balls
ID: 8mm x OD: 22mm x W: 7mm
Product Details
Closure Type:
Speed Limit:
1,600 RPM
Basic Load Ratings:
Static (Cor) : 33 lbf | Dynamic (Cr) : 42 lbf
Interchange Numbers:
A608-6 , P608 , GP608 , AP08 , 608PG , BB608-A500 GL
608PG Plastic Ball Bearing 8x22x7 Glass Balls

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