Plastic radial ball bearings are the only type of ball bearings used in underwater automatic pool cleaners. They are primarily chosen for their non-corrosive nature and the ability to run in liquids without a lubricant.
Critical Design features: POM plastic races and cage fitted with 316 stainless balls. Bearing construction features True Race Technology™ ball grooves and anti-clogging bearing designs.
Additional reasons for use:
Low friction: Automatic pool cleaners rely on converting energy from a pool’s intake suction or return pressure to make them move. They require a bearing that is low in friction and has low start up torque. The KMS bearing is a lightweight, no lube design with no metal to metal contact which reduces friction.
Part integration: A KMS bearing can be designed and manufactured as an integrated assembly that can reduce parts count, assembly time while improving performance.