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）
7806BTNDF尼龙保持器 30 42 7 11.2 9.1 0.05 DF pairing (P0, P6, P5 levels)
7906ACTNDF尼龙保持器 30 47 9 12.8 11.9 0.1 DF pairing (P0, P6, P5 levels)
7006ATNDF尼龙保持器 30 55 13 23.6 20.2 0.232 DF pairing (P0, P6, P5 levels)
7006BTNDF尼龙保持器 30 55 13 21.3 18.4 0.266 DF pairing (P0, P6, P5 levels)
7206ATNDF尼龙保持器 30 62 16 36.5 29.5 0.394 DF pairing (P0, P6, P5 levels)
7206BTNDF尼龙保持器 30 62 16 33.5 27 0.404 DF pairing (P0, P6, P5 levels)
7306CTNDF尼龙保持器 30 72 19 52.5 40.5 0.724 DF pairing (P0, P6, P5 levels)
7306ATNDF尼龙保持器 30 72 19 54.5 41.5 0.692 DF pairing (P0, P6, P5 levels)
7306BTNDF尼龙保持器 30 72 19 50.5 38.5 0.708 DF pairing (P0, P6, P5 levels)
7406ATNDF尼龙保持器 30 90 23 77.3 56.9 1.372 DF pairing (P0, P6, P5 levels)
7406BTNDF尼龙保持器 30 90 23 71.8 52.8 1.372 DF pairing (P0, P6, P5 levels)
7807BTNDF尼龙保持器 35 47 7 12 10.6 0.054 DF pairing (P0, P6, P5 levels)
7907ACTNDF尼龙保持器 35 55 10 18.6 17.4 0.15 DF pairing (P0, P6, P5 levels)
7007ATNDF尼龙保持器 35 62 14 29.7 26.8 0.306 DF pairing (P0, P6, P5 levels)
7007BTNDF尼龙保持器 35 62 14 25.7 22.8 0.34 DF pairing (P0, P6, P5 levels)
7207ATNDF尼龙保持器 35 72 17 48.5 40 0.574 DF pairing (P0, P6, P5 levels)
7207BTNDF尼龙保持器 35 72 17 44 36.5 0.588 DF pairing (P0, P6, P5 levels)
7307CTNDF尼龙保持器 35 80 21 61.6 47.2 0.95 DF pairing (P0, P6, P5 levels)
7307ATNDF尼龙保持器 35 80 21 65 52.5 0.928 DF pairing (P0, P6, P5 levels)
7307BTNDF尼龙保持器 35 80 21 59.5 48.5 0.948 DF pairing (P0, P6, P5 levels)