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）
7318CMDF车削铜保持器 90 190 43 281 289 10.6 DF pairing (P0, P6, P5 levels)
7318AMDF车削铜保持器 90 190 43 2 2.8 10.12 DF pairing (P0, P6, P5 levels)
7318BMDF车削铜保持器 90 190 43 1.8 2.4 10.34 DF pairing (P0, P6, P5 levels)
7418AMDF车削铜保持器 90 225 54 351 393 22.8 DF pairing (P0, P6, P5 levels)
7418BMDF车削铜保持器 90 225 54 325 364 22.8 DF pairing (P0, P6, P5 levels)
7019AMDF车削铜保持器 95 145 24 3.8 5 2.86 DF pairing (P0, P6, P5 levels)
7019BMDF车削铜保持器 95 145 24 97 121 2.64 DF pairing (P0, P6, P5 levels)
7219AMDF车削铜保持器 95 170 32 2.6 3.6 5.36 DF pairing (P0, P6, P5 levels)
7219BMDF车削铜保持器 95 170 32 1.9 2.6 5.48 DF pairing (P0, P6, P5 levels)
7319CMDF车削铜保持器 95 200 45 300 319 12.24 DF pairing (P0, P6, P5 levels)
7319AMDF车削铜保持器 95 200 45 1.9 2.6 11.66 DF pairing (P0, P6, P5 levels)
7319BMDF车削铜保持器 95 200 45 1.7 2.4 11.96 DF pairing (P0, P6, P5 levels)
7820AMDF车削铜保持器 100 125 13 34 50.5 0.72 DF pairing (P0, P6, P5 levels)
7920AMDF车削铜保持器 100 140 20 78 105 1.86 DF pairing (P0, P6, P5 levels)
7020AMDF车削铜保持器 100 150 24 3.6 5 2.96 DF pairing (P0, P6, P5 levels)
7020BMDF车削铜保持器 100 150 24 99.5 127 2.74 DF pairing (P0, P6, P5 levels)
7220AMDF车削铜保持器 100 180 34 233 251 6.44 DF pairing (P0, P6, P5 levels)
7220BMDF车削铜保持器 100 180 34 212 229 6.56 DF pairing (P0, P6, P5 levels)
7320CMDF车削铜保持器 100 215 47 320 346 15.06 DF pairing (P0, P6, P5 levels)
7320AMDF车削铜保持器 100 215 47 335 385 14.58 DF pairing (P0, P6, P5 levels)