FR156-2RS Full Ceramic Sealed Flanged Bearing 3/16x5/16x1/8 ZrO2 Part Number: Kit8453 Shipping Weight: 0.02 pounds Ball Bearings FR156-2RS Full Ceramic 3/16 x 5/16 x 1/8 Zirconia Full Ceramic Flanged Ball Bearings FR2-5-2RS, , Bearings are made of Ceramic. Item: Sealed All ceramic Flanged Ball bearings Type: Sealed Full Ceramic bearing Inner/outer races: ZrO2 Ceramic Balls: ZrO2 Ceramic (zirconia) Cage: PTFE Closures: PTFE Covers (white)

Full ceramic bearing side over the ball the ball with Tim gap, because no-cage structural design, the structure than the standard number of ceramic ball bearings mount to increase its load capacity, other materials can also avoid the restrictions cages can be to ceramic ceramic bearing cage type all effects of corrosion and heat resistance. Drawback is that because there is no cage, not suitable for high speed bearings in the series.