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）
BA270-1ADB车削铜保持器 270 320 24 138 315 6.9 DB pairing (P0, P6, P5 levels)
7856AMDB车削铜保持器 280 350 33 234 465 14.16 DB pairing (P0, P6, P5 levels)
7856BMDB车削铜保持器 280 350 33 208 415 14.06 DB pairing (P0, P6, P5 levels)
7956AMDB车削铜保持器 280 380 46 400 745 30 DB pairing (P0, P6, P5 levels)
7956BMDB车削铜保持器 280 380 46 355 670 30 DB pairing (P0, P6, P5 levels)
BA280-4ADB车削铜保持器 280 389.5 46 405 745 32 DB pairing (P0, P6, P5 levels)
BT280-1BDB车削铜保持器 280 389.5 46 360 650 32 DB pairing (P0, P6, P5 levels)
7056AMDB车削铜保持器 280 420 65 560 1060 62.4 DB pairing (P0, P6, P5 levels)
7056BMDB车削铜保持器 280 420 65 530 1040 62 DB pairing (P0, P6, P5 levels)
7256AMDB车削铜保持器 280 500 80 830 1690 138 DB pairing (P0, P6, P5 levels)
7256BMDB车削铜保持器 280 500 80 745 1530 140.2 DB pairing (P0, P6, P5 levels)
7356AMDB车削铜保持器 280 580 108 1080 2270 280 DB pairing (P0, P6, P5 levels)
BT285-1BDB车削铜保持器 285 380 46 335 605 29.4 DB pairing (P0, P6, P5 levels)
BT290-2BDB车削铜保持器 290 419.5 60 475 910 53.8 DB pairing (P0, P6, P5 levels)
7860AMDB车削铜保持器 300 380 38 297 580 20.2 DB pairing (P0, P6, P5 levels)
7860BMDB车削铜保持器 300 380 38 295 570 19.82 DB pairing (P0, P6, P5 levels)
7960AMDB车削铜保持器 300 420 56 510 1000 48.8 DB pairing (P0, P6, P5 levels)
7960BMDB车削铜保持器 300 420 56 455 900 47.4 DB pairing (P0, P6, P5 levels)
7060AMDB车削铜保持器 300 460 74 625 1210 89.8 DB pairing (P0, P6, P5 levels)
7060BMDB车削铜保持器 300 460 74 560 1090 89 DB pairing (P0, P6, P5 levels)