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）
7207BMDF车削铜保持器 35 72 17 44 36.5 0.588 DF pairing (P0, P6, P5 levels)
7307CMDF车削铜保持器 35 80 21 61.6 47.2 0.95 DF pairing (P0, P6, P5 levels)
7307AMDF车削铜保持器 35 80 21 65 52.5 0.928 DF pairing (P0, P6, P5 levels)
7307BMDF车削铜保持器 35 80 21 59.5 48.5 0.948 DF pairing (P0, P6, P5 levels)
7407AMDF车削铜保持器 35 100 25 98.2 73.9 1.9 DF pairing (P0, P6, P5 levels)
7407BMDF车削铜保持器 35 100 25 91.3 68.6 1.9 DF pairing (P0, P6, P5 levels)
7008AMDF车削铜保持器 40 68 15 31.5 31 0.38 DF pairing (P0, P6, P5 levels)
7008BMDF车削铜保持器 40 68 15 27.4 26.4 0.42 DF pairing (P0, P6, P5 levels)
7208AMDF车削铜保持器 40 80 18 57.5 50.5 0.75 DF pairing (P0, P6, P5 levels)
7208BMDF车削铜保持器 40 80 18 52 46 0.766 DF pairing (P0, P6, P5 levels)
7308CMDF车削铜保持器 40 90 23 75.3 58.8 1.314 DF pairing (P0, P6, P5 levels)
7308AMDF车削铜保持器 40 90 23 79.5 66 1.266 DF pairing (P0, P6, P5 levels)
7308BMDF车削铜保持器 40 90 23 73 60.5 1.296 DF pairing (P0, P6, P5 levels)
7408AMDF车削铜保持器 40 110 27 114 87.1 2.46 DF pairing (P0, P6, P5 levels)
7408BMDF车削铜保持器 40 110 27 105 80.8 2.46 DF pairing (P0, P6, P5 levels)
7009AMDF车削铜保持器 45 75 16 37.5 37.5 0.5 DF pairing (P0, P6, P5 levels)
7009BMDF车削铜保持器 45 75 16 32.5 32 0.52 DF pairing (P0, P6, P5 levels)
7209AMDF车削铜保持器 45 85 19 64.5 57.5 0.822 DF pairing (P0, P6, P5 levels)
7209BMDF车削铜保持器 45 85 19 58.5 52.5 0.842 DF pairing (P0, P6, P5 levels)
7309CMDF车削铜保持器 45 100 25 96.1 79.5 1.75 DF pairing (P0, P6, P5 levels)