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）
7407ATNDF尼龙保持器 35 100 25 98.2 73.9 1.9 DF pairing (P0, P6, P5 levels)
7407BTNDF尼龙保持器 35 100 25 91.3 68.6 1.9 DF pairing (P0, P6, P5 levels)
7808BTNDF尼龙保持器 40 52 7 12.6 11.7 0.058 DF pairing (P0, P6, P5 levels)
7908ACTNDF尼龙保持器 40 62 12 23.3 22.3 0.22 DF pairing (P0, P6, P5 levels)
7008ATNDF尼龙保持器 40 68 15 31.5 31 0.38 DF pairing (P0, P6, P5 levels)
7008BTNDF尼龙保持器 40 68 15 27.4 26.4 0.42 DF pairing (P0, P6, P5 levels)
7208ATNDF尼龙保持器 40 80 18 57.5 50.5 0.75 DF pairing (P0, P6, P5 levels)
7208BTNDF尼龙保持器 40 80 18 52 46 0.766 DF pairing (P0, P6, P5 levels)
7308CTNDF尼龙保持器 40 90 23 75.3 58.8 1.314 DF pairing (P0, P6, P5 levels)
7308ATNDF尼龙保持器 40 90 23 79.5 66 1.266 DF pairing (P0, P6, P5 levels)
7308BTNDF尼龙保持器 40 90 23 73 60.5 1.296 DF pairing (P0, P6, P5 levels)
7408ATNDF尼龙保持器 40 110 27 114 87.1 2.46 DF pairing (P0, P6, P5 levels)
7408BTNDF尼龙保持器 40 110 27 105 80.8 2.46 DF pairing (P0, P6, P5 levels)
7809BTNDF尼龙保持器 45 58 7 13.1 13.1 0.066 DF pairing (P0, P6, P5 levels)
7909ACTNDF尼龙保持器 45 68 12 24.6 25.4 0.26 DF pairing (P0, P6, P5 levels)
7009ATNDF尼龙保持器 45 75 16 37.5 37.5 0.5 DF pairing (P0, P6, P5 levels)
7009BTNDF尼龙保持器 45 75 16 32.5 32 0.52 DF pairing (P0, P6, P5 levels)
7209ATNDF尼龙保持器 45 85 19 64.5 57.5 0.822 DF pairing (P0, P6, P5 levels)
7209BTNDF尼龙保持器 45 85 19 58.5 52.5 0.842 DF pairing (P0, P6, P5 levels)
7309CTNDF尼龙保持器 45 100 25 96.1 79.5 1.75 DF pairing (P0, P6, P5 levels)