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）
7828ATNDF尼龙保持器 140 175 18 77 130 1.9 DF pairing (P0, P6, P5 levels)
7828BTNDF尼龙保持器 140 175 18 68 116 1.9 DF pairing (P0, P6, P5 levels)
7928ACTNDF尼龙保持器 140 190 24 122 180 3.26 DF pairing (P0, P6, P5 levels)
7928ATNDF尼龙保持器 140 190 24 117 173 3.84 DF pairing (P0, P6, P5 levels)
7928BTNDF尼龙保持器 140 190 24 104 155 3.9 DF pairing (P0, P6, P5 levels)
7028ATNDF尼龙保持器 140 210 33 194 265 7.8 DF pairing (P0, P6, P5 levels)
7028BTNDF尼龙保持器 140 210 33 174 239 7.28 DF pairing (P0, P6, P5 levels)
7228ATNDF尼龙保持器 140 250 42 355 470 17.84 DF pairing (P0, P6, P5 levels)
7228BTNDF尼龙保持器 140 250 42 320 425 17.88 DF pairing (P0, P6, P5 levels)
7328CTNDF尼龙保持器 140 300 62 573 802 37.6 DF pairing (P0, P6, P5 levels)
7328ATNDF尼龙保持器 140 300 62 490 670 42.8 DF pairing (P0, P6, P5 levels)
7328BTNDF尼龙保持器 140 300 62 445 615 43.2 DF pairing (P0, P6, P5 levels)
7830ATNDF尼龙保持器 150 190 20 87 149 2.64 DF pairing (P0, P6, P5 levels)
7830BTNDF尼龙保持器 150 190 20 77 133 2.6 DF pairing (P0, P6, P5 levels)
7930ACTNDF尼龙保持器 150 210 28 157 231 5.94 DF pairing (P0, P6, P5 levels)
7930ATNDF尼龙保持器 150 210 28 150 222 5.98 DF pairing (P0, P6, P5 levels)
7930BTNDF尼龙保持器 150 210 28 134 199 5.9 DF pairing (P0, P6, P5 levels)
7030ATNDF尼龙保持器 150 225 35 222 305 9.5 DF pairing (P0, P6, P5 levels)
7030BTNDF尼龙保持器 150 225 35 199 277 8.86 DF pairing (P0, P6, P5 levels)
7230ATNDF尼龙保持器 150 270 45 405 560 22.4 DF pairing (P0, P6, P5 levels)