Anti-dust and anti-water bearings

The performance of sealing is vital to the cleanliness of the lubricant and the overall service life of the bearing arrangement. Integral bearing seals must be able to keep contaminants out and lubricant in the bearing cavity.

Inner ring seal groove types

V-grooveL-groove
HCH bearings give priority to adopt “V” type seal groove, which have better dustproof abilityOther bearings for electric power tools adopt “L” type seal groove, which have general dustproof effect

 

Shield and seals

Type, code No.Shielded typeSealed type
Non-contact typeNon-contact typeContact typeTight sealing type
HCHZZ2RZ2RS2RS1
Construction
TorqueLowLowMediumHigher torque than 2RS
Dust proofingVery goodBetter than ZZ-typeGoodExcellent
Water proofingPoorPoorGoodExcellent
High speed capacitySame as open typeSame as open typeBetter than 2RS1Good