DF pairing (P0, P6, P5 levels)

DF pairing is one of the three classic paired installation methods for angular contact ball bearings, with the full name Double Face to Face and code DF. The core is to install two angular contact ball bearings of the same specification with the narrow outer edge facing each other and the wide inner edge facing each other, with the contact angle centerline converging towards the inside of the bearing to form an "inner eight" layout. It is suitable for radial loads and bidirectional axial loads, with small shaft span and high concentricity requirements. It is a commonly used choice for compact shaft systems such as pump valves, motor end caps, and small spindles, and can be adapted to a full range of angular contact ball bearings such as 7000C/AC/B and AC7000 full ceramic types.

Model Basic Dimensions Basic rated dynamic load WeightType
Inner diameter Outer diameter Thickness Dynamic load Static load
[mm] [mm] [mm] (kN) (kN) （kg）
7318AWDF冲压钢保持器 90 190 43 2 2.8 10.12 DF pairing (P0, P6, P5 levels)
7318BWDF冲压钢保持器 90 190 43 1.8 2.4 10.34 DF pairing (P0, P6, P5 levels)
7418AWDF冲压钢保持器 90 225 54 351 393 22.8 DF pairing (P0, P6, P5 levels)
7418BWDF冲压钢保持器 90 225 54 325 364 22.8 DF pairing (P0, P6, P5 levels)
7019AWDF冲压钢保持器 95 145 24 3.8 5 2.86 DF pairing (P0, P6, P5 levels)
7019BWDF冲压钢保持器 95 145 24 97 121 2.64 DF pairing (P0, P6, P5 levels)
7219AWDF冲压钢保持器 95 170 32 2.6 3.6 5.36 DF pairing (P0, P6, P5 levels)
7219BWDF冲压钢保持器 95 170 32 1.9 2.6 5.48 DF pairing (P0, P6, P5 levels)
7319AWDF冲压钢保持器 95 200 45 1.9 2.6 11.66 DF pairing (P0, P6, P5 levels)
7319BWDF冲压钢保持器 95 200 45 1.7 2.4 11.96 DF pairing (P0, P6, P5 levels)
7020AWDF冲压钢保持器 100 150 24 3.6 5 2.96 DF pairing (P0, P6, P5 levels)
7020BWDF冲压钢保持器 100 150 24 99.5 127 2.74 DF pairing (P0, P6, P5 levels)
7220AWDF冲压钢保持器 100 180 34 233 251 6.44 DF pairing (P0, P6, P5 levels)
7220BWDF冲压钢保持器 100 180 34 212 229 6.56 DF pairing (P0, P6, P5 levels)
7320AWDF冲压钢保持器 100 215 47 335 385 14.58 DF pairing (P0, P6, P5 levels)
7320BWDF冲压钢保持器 100 215 47 310 355 14.86 DF pairing (P0, P6, P5 levels)
7021AWDF冲压钢保持器 105 160 26 130 163 3.68 DF pairing (P0, P6, P5 levels)
7021BWDF冲压钢保持器 105 160 26 116 147 3.46 DF pairing (P0, P6, P5 levels)
7221AWDF冲压钢保持器 105 190 36 254 283 7.68 DF pairing (P0, P6, P5 levels)
7221BWDF冲压钢保持器 105 190 36 231 258 7.84 DF pairing (P0, P6, P5 levels)