DB pairing (P0, P6, P5 levels)

DB pairing is the most commonly used paired installation method for angular contact ball bearings, full name Double Back to Back, also known as back-to-back pairing, code named DB. The core is to install two angular contact ball bearings of the same specification with the outer ring wide edge facing each other and the inner ring narrow edge facing each other, forming an open layout facing both sides, suitable for radial+bidirectional axial load+overturning moment working conditions. It is the mainstream choice for shaft systems such as machine tool spindles, precision motors, reducers, etc. that require rigidity and rotational accuracy, and can also be adapted to angular contact ball bearings such as AC7000 and 7000 series.

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