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）
7028AWDB冲压钢保持器 140 210 33 194 265 7.8 DB pairing (P0, P6, P5 levels)
7028BWDB冲压钢保持器 140 210 33 174 239 7.28 DB pairing (P0, P6, P5 levels)
7228AWDB冲压钢保持器 140 250 42 355 470 17.84 DB pairing (P0, P6, P5 levels)
7228BWDB冲压钢保持器 140 250 42 320 425 17.88 DB pairing (P0, P6, P5 levels)
7328AWDB冲压钢保持器 140 300 62 490 670 42.8 DB pairing (P0, P6, P5 levels)
7328BWDB冲压钢保持器 140 300 62 445 615 43.2 DB pairing (P0, P6, P5 levels)
7030AWDB冲压钢保持器 150 225 35 222 305 9.5 DB pairing (P0, P6, P5 levels)
7030BWDB冲压钢保持器 150 225 35 199 277 8.86 DB pairing (P0, P6, P5 levels)
7230AWDB冲压钢保持器 150 270 45 405 560 22.4 DB pairing (P0, P6, P5 levels)
7230BWDB冲压钢保持器 150 270 45 365 510 22.4 DB pairing (P0, P6, P5 levels)
7330AWDB冲压钢保持器 150 320 65 515 745 52 DB pairing (P0, P6, P5 levels)
7330BWDB冲压钢保持器 150 320 65 470 680 51.8 DB pairing (P0, P6, P5 levels)
7032AWDB冲压钢保持器 160 240 38 252 355 11.54 DB pairing (P0, P6, P5 levels)
7032BWDB冲压钢保持器 160 240 38 225 320 10.9 DB pairing (P0, P6, P5 levels)
7232AWDB冲压钢保持器 160 290 48 425 615 28.2 DB pairing (P0, P6, P5 levels)
7232BWDB冲压钢保持器 160 290 48 385 555 28.4 DB pairing (P0, P6, P5 levels)
7332AWDB冲压钢保持器 160 340 68 565 845 61.4 DB pairing (P0, P6, P5 levels)
7332BWDB冲压钢保持器 160 340 68 515 770 61.6 DB pairing (P0, P6, P5 levels)
7034AWDB冲压钢保持器 170 260 42 300 430 15.8 DB pairing (P0, P6, P5 levels)
7034BWDB冲压钢保持器 170 260 42 270 385 15.54 DB pairing (P0, P6, P5 levels)