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）
7309AMDF车削铜保持器 45 100 25 103 87 1.696 DF pairing (P0, P6, P5 levels)
7309BMDF车削铜保持器 45 100 25 95 80.5 1.738 DF pairing (P0, P6, P5 levels)
7409AMDF车削铜保持器 45 120 29 138 108 3.1 DF pairing (P0, P6, P5 levels)
7409BMDF车削铜保持器 45 120 29 128 100 3.1 DF pairing (P0, P6, P5 levels)
7010AMDF车削铜保持器 50 80 16 40 42 0.526 DF pairing (P0, P6, P5 levels)
7010BMDF车削铜保持器 50 80 16 34.5 36.2 0.58 DF pairing (P0, P6, P5 levels)
7210AMDF车削铜保持器 50 90 20 67 63 0.932 DF pairing (P0, P6, P5 levels)
7210BMDF车削铜保持器 50 90 20 60.5 57 0.954 DF pairing (P0, P6, P5 levels)
7310CMDF车削铜保持器 50 110 27 122 103 2.28 DF pairing (P0, P6, P5 levels)
7310AMDF车削铜保持器 50 110 27 121 104 2.2 DF pairing (P0, P6, P5 levels)
7310BMDF车削铜保持器 50 110 27 111 96 2.24 DF pairing (P0, P6, P5 levels)
7410AMDF车削铜保持器 50 130 31 158 131 3.84 DF pairing (P0, P6, P5 levels)
7410BMDF车削铜保持器 50 130 31 147 121 3.84 DF pairing (P0, P6, P5 levels)
7011AMDF车削铜保持器 55 90 18 52.5 55.5 0.782 DF pairing (P0, P6, P5 levels)
7011BMDF车削铜保持器 55 90 18 45.4 47.5 0.84 DF pairing (P0, P6, P5 levels)
7211AMDF车削铜保持器 55 100 21 83 79 1.226 DF pairing (P0, P6, P5 levels)
7211BMDF车削铜保持器 55 100 21 75 72 1.254 DF pairing (P0, P6, P5 levels)
7311CMDF车削铜保持器 55 120 29 141 121 2.9 DF pairing (P0, P6, P5 levels)
7311AMDF车削铜保持器 55 120 29 139 123 2.82 DF pairing (P0, P6, P5 levels)
7311BMDF车削铜保持器 55 120 29 128 113 2.9 DF pairing (P0, P6, P5 levels)