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）
7203AWDF冲压钢保持器 17 40 12 17.6 12 0.134 DF pairing (P0, P6, P5 levels)
7203BWDF冲压钢保持器 17 40 12 16.1 11 0.136 DF pairing (P0, P6, P5 levels)
7303AWDF冲压钢保持器 17 47 14 25.9 17.3 0.232 DF pairing (P0, P6, P5 levels)
7303BWDF冲压钢保持器 17 47 14 24 16 0.236 DF pairing (P0, P6, P5 levels)
7004AWDF冲压钢保持器 20 42 12 17.6 13.2 0.136 DF pairing (P0, P6, P5 levels)
7004BWDF冲压钢保持器 20 42 12 15.2 11.1 0.158 DF pairing (P0, P6, P5 levels)
7204AWDF冲压钢保持器 20 47 14 23.5 16.6 0.212 DF pairing (P0, P6, P5 levels)
7204BWDF冲压钢保持器 20 47 14 21.6 15.3 0.218 DF pairing (P0, P6, P5 levels)
7304AWDF冲压钢保持器 20 52 15 30.5 20.8 0.292 DF pairing (P0, P6, P5 levels)
7304BWDF冲压钢保持器 20 52 15 28.2 19.3 0.3 DF pairing (P0, P6, P5 levels)
7404AWDF冲压钢保持器 20 72 19 57.8 38.2 0.79 DF pairing (P0, P6, P5 levels)
7404BWDF冲压钢保持器 20 72 19 54.4 35.9 0.79 DF pairing (P0, P6, P5 levels)
7005AWDF冲压钢保持器 25 47 12 18.3 14.8 0.158 DF pairing (P0, P6, P5 levels)
7005BWDF冲压钢保持器 25 47 12 16.6 13.4 0.182 DF pairing (P0, P6, P5 levels)
7205AWDF冲压钢保持器 25 52 15 26.3 20.5 0.26 DF pairing (P0, P6, P5 levels)
7205BWDF冲压钢保持器 25 52 15 24 18.8 0.266 DF pairing (P0, P6, P5 levels)
7305AWDF冲压钢保持器 25 62 17 43 31.5 0.47 DF pairing (P0, P6, P5 levels)
7305BWDF冲压钢保持器 25 62 17 39.5 29.3 0.482 DF pairing (P0, P6, P5 levels)
7405AWDF冲压钢保持器 25 80 21 64.5 46.3 1.054 DF pairing (P0, P6, P5 levels)
7405BWDF冲压钢保持器 25 80 21 60 43 1.054 DF pairing (P0, P6, P5 levels)