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）
7348BTNDF尼龙保持器 240 500 95 835 1600 183.8 DF pairing (P0, P6, P5 levels)
7852ATNDF尼龙保持器 260 320 28 185 380 9.38 DF pairing (P0, P6, P5 levels)
7852BTNDF尼龙保持器 260 320 28 164 340 9.34 DF pairing (P0, P6, P5 levels)
7952ATNDF尼龙保持器 260 360 46 375 660 28.6 DF pairing (P0, P6, P5 levels)
7952BTNDF尼龙保持器 260 360 46 335 595 28.4 DF pairing (P0, P6, P5 levels)
7052ATNDF尼龙保持器 260 400 65 565 1050 57.4 DF pairing (P0, P6, P5 levels)
7052BTNDF尼龙保持器 260 400 65 505 945 58 DF pairing (P0, P6, P5 levels)
7252ATNDF尼龙保持器 260 480 80 775 1500 130.6 DF pairing (P0, P6, P5 levels)
7252BTNDF尼龙保持器 260 480 80 700 1360 131 DF pairing (P0, P6, P5 levels)
7352ATNDF尼龙保持器 260 540 102 960 1920 230 DF pairing (P0, P6, P5 levels)
7856ATNDF尼龙保持器 280 350 33 234 465 14.16 DF pairing (P0, P6, P5 levels)
7856BTNDF尼龙保持器 280 350 33 208 415 14.06 DF pairing (P0, P6, P5 levels)
7956ATNDF尼龙保持器 280 380 46 400 745 30 DF pairing (P0, P6, P5 levels)
7956BTNDF尼龙保持器 280 380 46 355 670 30 DF pairing (P0, P6, P5 levels)
7056ATNDF尼龙保持器 280 420 65 560 1060 62.4 DF pairing (P0, P6, P5 levels)
7056BTNDF尼龙保持器 280 420 65 530 1040 62 DF pairing (P0, P6, P5 levels)
7256ATNDF尼龙保持器 280 500 80 830 1690 138 DF pairing (P0, P6, P5 levels)
7256BTNDF尼龙保持器 280 500 80 745 1530 140.2 DF pairing (P0, P6, P5 levels)
7356ATNDF尼龙保持器 280 580 108 1080 2270 280 DF pairing (P0, P6, P5 levels)
7860ATNDF尼龙保持器 300 380 38 297 580 20.2 DF pairing (P0, P6, P5 levels)