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）
7004ATNDF尼龙保持器 20 42 12 17.6 13.2 0.136 DF pairing (P0, P6, P5 levels)
7004BTNDF尼龙保持器 20 42 12 15.2 11.1 0.158 DF pairing (P0, P6, P5 levels)
7204ATNDF尼龙保持器 20 47 14 23.5 16.6 0.212 DF pairing (P0, P6, P5 levels)
7204BTNDF尼龙保持器 20 47 14 21.6 15.3 0.218 DF pairing (P0, P6, P5 levels)
7304CTNDF尼龙保持器 20 52 15 30.1 19.9 0.3 DF pairing (P0, P6, P5 levels)
7304ATNDF尼龙保持器 20 52 15 30.5 20.8 0.292 DF pairing (P0, P6, P5 levels)
7304BTNDF尼龙保持器 20 52 15 28.2 19.3 0.3 DF pairing (P0, P6, P5 levels)
7404ATNDF尼龙保持器 20 72 19 57.8 38.2 0.79 DF pairing (P0, P6, P5 levels)
7404BTNDF尼龙保持器 20 72 19 54.4 35.9 0.79 DF pairing (P0, P6, P5 levels)
7805BTNDF尼龙保持器 25 37 7 7.8 6.1 0.042 DF pairing (P0, P6, P5 levels)
7905ACTNDF尼龙保持器 25 42 9 12.1 10.3 0.086 DF pairing (P0, P6, P5 levels)
7005ATNDF尼龙保持器 25 47 12 18.3 14.8 0.158 DF pairing (P0, P6, P5 levels)
7005BTNDF尼龙保持器 25 47 12 16.6 13.4 0.182 DF pairing (P0, P6, P5 levels)
7205ATNDF尼龙保持器 25 52 15 26.3 20.5 0.26 DF pairing (P0, P6, P5 levels)
7205BTNDF尼龙保持器 25 52 15 24 18.8 0.266 DF pairing (P0, P6, P5 levels)
7305CTNDF尼龙保持器 25 62 17 42.8 30.6 0.486 DF pairing (P0, P6, P5 levels)
7305ATNDF尼龙保持器 25 62 17 43 31.5 0.47 DF pairing (P0, P6, P5 levels)
7305BTNDF尼龙保持器 25 62 17 39.5 29.3 0.482 DF pairing (P0, P6, P5 levels)
7405ATNDF尼龙保持器 25 80 21 64.5 46.3 1.054 DF pairing (P0, P6, P5 levels)
7405BTNDF尼龙保持器 25 80 21 60 43 1.054 DF pairing (P0, P6, P5 levels)