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）
7872BTNDB尼龙保持器 360 440 38 315 680 23.4 DB pairing (P0, P6, P5 levels)
7972ATNDB尼龙保持器 360 480 56 540 1180 55.8 DB pairing (P0, P6, P5 levels)
7972BTNDB尼龙保持器 360 480 56 480 1060 55.8 DB pairing (P0, P6, P5 levels)
7072ATNDB尼龙保持器 360 540 82 865 1920 124.8 DB pairing (P0, P6, P5 levels)
7072BTNDB尼龙保持器 360 540 82 775 1730 127.2 DB pairing (P0, P6, P5 levels)
7272ATNDB尼龙保持器 360 650 95 1090 2550 288 DB pairing (P0, P6, P5 levels)
7272BTNDB尼龙保持器 360 650 95 975 2310 280 DB pairing (P0, P6, P5 levels)
7876ATNDB尼龙保持器 380 480 46 455 955 39 DB pairing (P0, P6, P5 levels)
7976ATNDB尼龙保持器 380 520 65 635 1450 79.6 DB pairing (P0, P6, P5 levels)
7976BTNDB尼龙保持器 380 520 65 565 1300 81.4 DB pairing (P0, P6, P5 levels)
7076ATNDB尼龙保持器 380 560 82 800 1750 135.8 DB pairing (P0, P6, P5 levels)
7076BTNDB尼龙保持器 380 560 82 720 1580 133.4 DB pairing (P0, P6, P5 levels)
7880ATNDB尼龙保持器 400 500 46 465 1000 40.8 DB pairing (P0, P6, P5 levels)
7980ATNDB尼龙保持器 400 540 65 640 1500 84.2 DB pairing (P0, P6, P5 levels)
7980BTNDB尼龙保持器 400 540 65 570 1350 84.6 DB pairing (P0, P6, P5 levels)
7080ATNDB尼龙保持器 400 600 90 905 2030 171.8 DB pairing (P0, P6, P5 levels)
7080BTNDB尼龙保持器 400 600 90 810 1830 172.4 DB pairing (P0, P6, P5 levels)
7884ATNDB尼龙保持器 420 520 46 505 1110 42.2 DB pairing (P0, P6, P5 levels)
7984ATNDB尼龙保持器 420 560 65 665 1610 88 DB pairing (P0, P6, P5 levels)
7984BTNDB尼龙保持器 420 560 65 590 1440 88.8 DB pairing (P0, P6, P5 levels)