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）
BT310-1BDB车削铜保持器 310 429.5 60 480 945 53.4 DB pairing (P0, P6, P5 levels)
7864AMDB车削铜保持器 320 400 38 310 635 21 DB pairing (P0, P6, P5 levels)
7864BMDB车削铜保持器 320 400 38 274 565 21 DB pairing (P0, P6, P5 levels)
7964AMDB车削铜保持器 320 440 56 515 1050 51.8 DB pairing (P0, P6, P5 levels)
7964BMDB车削铜保持器 320 440 56 460 940 50.6 DB pairing (P0, P6, P5 levels)
7064AMDB车削铜保持器 320 480 74 755 1590 94.4 DB pairing (P0, P6, P5 levels)
7064BMDB车削铜保持器 320 480 74 675 1430 93.8 DB pairing (P0, P6, P5 levels)
7264AMDB车削铜保持器 320 580 92 1030 2230 220 DB pairing (P0, P6, P5 levels)
7264BMDB车削铜保持器 320 580 92 960 2140 218 DB pairing (P0, P6, P5 levels)
7868AMDB车削铜保持器 340 420 38 310 655 22.2 DB pairing (P0, P6, P5 levels)
7868BMDB车削铜保持器 340 420 38 275 585 22.4 DB pairing (P0, P6, P5 levels)
7968AMDB车削铜保持器 340 460 56 535 1130 54.4 DB pairing (P0, P6, P5 levels)
7968BMDB车削铜保持器 340 460 56 475 1020 54.4 DB pairing (P0, P6, P5 levels)
7068AMDB车削铜保持器 340 520 82 845 1810 121 DB pairing (P0, P6, P5 levels)
7068BMDB车削铜保持器 340 520 82 755 1640 123.6 DB pairing (P0, P6, P5 levels)
7872AMDB车削铜保持器 360 440 38 355 765 23.4 DB pairing (P0, P6, P5 levels)
7872BMDB车削铜保持器 360 440 38 315 680 23.4 DB pairing (P0, P6, P5 levels)
7972AMDB车削铜保持器 360 480 56 540 1180 55.8 DB pairing (P0, P6, P5 levels)
7972BMDB车削铜保持器 360 480 56 480 1060 55.8 DB pairing (P0, P6, P5 levels)
BT360-1BDB车削铜保持器 360 509.5 70 635 1370 90 DB pairing (P0, P6, P5 levels)