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）
7308AWDF冲压钢保持器 40 90 23 79.5 66 1.266 DF pairing (P0, P6, P5 levels)
7308BWDF冲压钢保持器 40 90 23 73 60.5 1.296 DF pairing (P0, P6, P5 levels)
7408AWDF冲压钢保持器 40 110 27 114 87.1 2.46 DF pairing (P0, P6, P5 levels)
7408BWDF冲压钢保持器 40 110 27 105 80.8 2.46 DF pairing (P0, P6, P5 levels)
7009AWDF冲压钢保持器 45 75 16 37.5 37.5 0.5 DF pairing (P0, P6, P5 levels)
7009BWDF冲压钢保持器 45 75 16 32.5 32 0.52 DF pairing (P0, P6, P5 levels)
7209AWDF冲压钢保持器 45 85 19 64.5 57.5 0.822 DF pairing (P0, P6, P5 levels)
7209BWDF冲压钢保持器 45 85 19 58.5 52.5 0.842 DF pairing (P0, P6, P5 levels)
7309AWDF冲压钢保持器 45 100 25 103 87 1.696 DF pairing (P0, P6, P5 levels)
7309BWDF冲压钢保持器 45 100 25 95 80.5 1.738 DF pairing (P0, P6, P5 levels)
7409AWDF冲压钢保持器 45 120 29 138 108 3.1 DF pairing (P0, P6, P5 levels)
7409BWDF冲压钢保持器 45 120 29 128 100 3.1 DF pairing (P0, P6, P5 levels)
7010AWDF冲压钢保持器 50 80 16 40 42 0.526 DF pairing (P0, P6, P5 levels)
7010BWDF冲压钢保持器 50 80 16 34.5 36.2 0.58 DF pairing (P0, P6, P5 levels)
7210AWDF冲压钢保持器 50 90 20 67 63 0.932 DF pairing (P0, P6, P5 levels)
7210BWDF冲压钢保持器 50 90 20 60.5 57 0.954 DF pairing (P0, P6, P5 levels)
7310AWDF冲压钢保持器 50 110 27 121 104 2.2 DF pairing (P0, P6, P5 levels)
7310BWDF冲压钢保持器 50 110 27 111 96 2.24 DF pairing (P0, P6, P5 levels)
7410AWDF冲压钢保持器 50 130 31 158 131 3.84 DF pairing (P0, P6, P5 levels)
7410BWDF冲压钢保持器 50 130 31 147 121 3.84 DF pairing (P0, P6, P5 levels)