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）
7416BTNDF尼龙保持器 80 200 48 290 307 12 DF pairing (P0, P6, P5 levels)
7917ACTNDF尼龙保持器 85 120 18 5.3 7.5 1.082 DF pairing (P0, P6, P5 levels)
7017ATNDF尼龙保持器 85 130 22 3.4 4.5 1.826 DF pairing (P0, P6, P5 levels)
7017BTNDF尼龙保持器 85 130 22 79.3 96.7 1.94 DF pairing (P0, P6, P5 levels)
7217ATNDF尼龙保持器 85 150 28 3 4.3 3.66 DF pairing (P0, P6, P5 levels)
7217BTNDF尼龙保持器 85 150 28 2.2 3 3.74 DF pairing (P0, P6, P5 levels)
7317CTNDF尼龙保持器 85 180 41 261 261 9.06 DF pairing (P0, P6, P5 levels)
7317ATNDF尼龙保持器 85 180 41 2.2 2.8 8.66 DF pairing (P0, P6, P5 levels)
7317BTNDF尼龙保持器 85 180 41 1.9 2.6 8.84 DF pairing (P0, P6, P5 levels)
7417ATNDF尼龙保持器 85 210 52 331 360 17.08 DF pairing (P0, P6, P5 levels)
7417BTNDF尼龙保持器 85 210 52 307 334 17.08 DF pairing (P0, P6, P5 levels)
7918ACTNDF尼龙保持器 90 125 18 5 7.1 1.12 DF pairing (P0, P6, P5 levels)
7018ATNDF尼龙保持器 90 140 24 3.2 4.3 2.38 DF pairing (P0, P6, P5 levels)
7018BTNDF尼龙保持器 90 140 24 95 114 2.52 DF pairing (P0, P6, P5 levels)
7218ATNDF尼龙保持器 90 160 30 2.8 4 4.5 DF pairing (P0, P6, P5 levels)
7218BTNDF尼龙保持器 90 160 30 2 2.8 4.58 DF pairing (P0, P6, P5 levels)
7318CTNDF尼龙保持器 90 190 43 281 289 10.6 DF pairing (P0, P6, P5 levels)
7318ATNDF尼龙保持器 90 190 43 2 2.8 10.12 DF pairing (P0, P6, P5 levels)
7318BTNDF尼龙保持器 90 190 43 1.8 2.4 10.34 DF pairing (P0, P6, P5 levels)
7418ATNDF尼龙保持器 90 225 54 351 393 22.8 DF pairing (P0, P6, P5 levels)