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）
BT220-3BDF车削铜保持器 220 309.5 38 310 490 17.8 DF pairing (P0, P6, P5 levels)
BT220-4BDF车削铜保持器 220 319.5 46 365 600 24.4 DF pairing (P0, P6, P5 levels)
7044AMDF车削铜保持器 220 340 56 460 785 37 DF pairing (P0, P6, P5 levels)
7044BMDF车削铜保持器 220 340 56 410 710 36.8 DF pairing (P0, P6, P5 levels)
7244AMDF车削铜保持器 220 400 65 665 1170 73 DF pairing (P0, P6, P5 levels)
7244BMDF车削铜保持器 220 400 65 600 1060 72.2 DF pairing (P0, P6, P5 levels)
7344AMDF车削铜保持器 220 460 88 805 1450 146.4 DF pairing (P0, P6, P5 levels)
7344BMDF车削铜保持器 220 460 88 730 1330 145.8 DF pairing (P0, P6, P5 levels)
7848AMDF车削铜保持器 240 300 28 179 350 8.7 DF pairing (P0, P6, P5 levels)
7848BMDF车削铜保持器 240 300 28 159 315 8.7 DF pairing (P0, P6, P5 levels)
7948AMDF车削铜保持器 240 320 38 293 520 16.74 DF pairing (P0, P6, P5 levels)
7948BMDF车削铜保持器 240 320 38 261 465 16.86 DF pairing (P0, P6, P5 levels)
BA240-3ADF车削铜保持器 240 329.5 40 360 605 20 DF pairing (P0, P6, P5 levels)
BT240BDF车削铜保持器 240 329.5 40 320 530 20.2 DF pairing (P0, P6, P5 levels)
BA240-1ADF车削铜保持器 240 340 40 345 575 23 DF pairing (P0, P6, P5 levels)
7048AMDF车削铜保持器 240 360 56 485 865 38.6 DF pairing (P0, P6, P5 levels)
7048BMDF车削铜保持器 240 360 56 435 780 39.8 DF pairing (P0, P6, P5 levels)
7248AMDF车削铜保持器 240 440 72 705 1330 101.8 DF pairing (P0, P6, P5 levels)
7248BMDF车削铜保持器 240 440 72 635 1200 100.6 DF pairing (P0, P6, P5 levels)
7348AMDF车削铜保持器 240 500 95 920 1760 185 DF pairing (P0, P6, P5 levels)