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）
7930ACMDB车削铜保持器 150 210 28 157 231 5.94 DB pairing (P0, P6, P5 levels)
7930AMDB车削铜保持器 150 210 28 150 222 5.98 DB pairing (P0, P6, P5 levels)
BA150-6ADB车削铜保持器 150 210 28 133 208 10.76 DB pairing (P0, P6, P5 levels)
7930BMDB车削铜保持器 150 210 28 134 199 5.9 DB pairing (P0, P6, P5 levels)
7030AMDB车削铜保持器 150 225 35 222 305 9.5 DB pairing (P0, P6, P5 levels)
7030BMDB车削铜保持器 150 225 35 199 277 8.86 DB pairing (P0, P6, P5 levels)
7230AMDB车削铜保持器 150 270 45 405 560 22.4 DB pairing (P0, P6, P5 levels)
7230BMDB车削铜保持器 150 270 45 365 510 22.4 DB pairing (P0, P6, P5 levels)
7330CMDB车削铜保持器 150 320 65 607 891 44.8 DB pairing (P0, P6, P5 levels)
7330AMDB车削铜保持器 150 320 65 515 745 52 DB pairing (P0, P6, P5 levels)
7330BMDB车削铜保持器 150 320 65 470 680 51.8 DB pairing (P0, P6, P5 levels)
7832AMDB车削铜保持器 160 200 20 89 159 2.78 DB pairing (P0, P6, P5 levels)
7832BMDB车削铜保持器 160 200 20 79 142 2.76 DB pairing (P0, P6, P5 levels)
BT160-6BDB车削铜保持器 160 215 28 123 186 5.48 DB pairing (P0, P6, P5 levels)
7932CMDB车削铜保持器 160 220 28 173 265 6.2 DB pairing (P0, P6, P5 levels)
7932AMDB车削铜保持器 160 220 28 156 241 6.22 DB pairing (P0, P6, P5 levels)
7932BMDB车削铜保持器 160 220 28 139 216 6.22 DB pairing (P0, P6, P5 levels)
BT160-1BDB车削铜保持器 160 229.5 33 180 256 9.04 DB pairing (P0, P6, P5 levels)
BA160-2ADB车削铜保持器 160 230 33 201 293 8.3 DB pairing (P0, P6, P5 levels)
7032AMDB车削铜保持器 160 240 38 252 355 11.54 DB pairing (P0, P6, P5 levels)