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）
7418BTNDF尼龙保持器 90 225 54 325 364 22.8 DF pairing (P0, P6, P5 levels)
7919ACTNDF尼龙保持器 95 130 18 4.8 6.7 1.194 DF pairing (P0, P6, P5 levels)
7019ATNDF尼龙保持器 95 145 24 3.8 5 2.86 DF pairing (P0, P6, P5 levels)
7019BTNDF尼龙保持器 95 145 24 97 121 2.64 DF pairing (P0, P6, P5 levels)
7219ATNDF尼龙保持器 95 170 32 2.6 3.6 5.36 DF pairing (P0, P6, P5 levels)
7219BTNDF尼龙保持器 95 170 32 1.9 2.6 5.48 DF pairing (P0, P6, P5 levels)
7319CTNDF尼龙保持器 95 200 45 300 319 12.24 DF pairing (P0, P6, P5 levels)
7319ATNDF尼龙保持器 95 200 45 1.9 2.6 11.66 DF pairing (P0, P6, P5 levels)
7319BTNDF尼龙保持器 95 200 45 1.7 2.4 11.96 DF pairing (P0, P6, P5 levels)
7820ATNDF尼龙保持器 100 125 13 34 50.5 0.72 DF pairing (P0, P6, P5 levels)
7920ACTNDF尼龙保持器 100 140 20 4.5 6.3 1.608 DF pairing (P0, P6, P5 levels)
7920ATNDF尼龙保持器 100 140 20 78 105 1.86 DF pairing (P0, P6, P5 levels)
7020ATNDF尼龙保持器 100 150 24 3.6 5 2.96 DF pairing (P0, P6, P5 levels)
7020BTNDF尼龙保持器 100 150 24 99.5 127 2.74 DF pairing (P0, P6, P5 levels)
7220ATNDF尼龙保持器 100 180 34 233 251 6.44 DF pairing (P0, P6, P5 levels)
7220BTNDF尼龙保持器 100 180 34 212 229 6.56 DF pairing (P0, P6, P5 levels)
7320CTNDF尼龙保持器 100 215 47 320 346 15.06 DF pairing (P0, P6, P5 levels)
7320ATNDF尼龙保持器 100 215 47 335 385 14.58 DF pairing (P0, P6, P5 levels)
7320BTNDF尼龙保持器 100 215 47 310 355 14.86 DF pairing (P0, P6, P5 levels)
7821ATNDF尼龙保持器 105 130 13 35 53 0.74 DF pairing (P0, P6, P5 levels)