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）
7318AWDB冲压钢保持器 90 190 43 2 2.8 10.12 DB pairing (P0, P6, P5 levels)
7318BWDB冲压钢保持器 90 190 43 1.8 2.4 10.34 DB pairing (P0, P6, P5 levels)
7418AWDB冲压钢保持器 90 225 54 351 393 22.8 DB pairing (P0, P6, P5 levels)
7418BWDB冲压钢保持器 90 225 54 325 364 22.8 DB pairing (P0, P6, P5 levels)
7019AWDB冲压钢保持器 95 145 24 3.8 5 2.86 DB pairing (P0, P6, P5 levels)
7019BWDB冲压钢保持器 95 145 24 97 121 2.64 DB pairing (P0, P6, P5 levels)
7219AWDB冲压钢保持器 95 170 32 2.6 3.6 5.36 DB pairing (P0, P6, P5 levels)
7219BWDB冲压钢保持器 95 170 32 1.9 2.6 5.48 DB pairing (P0, P6, P5 levels)
7319AWDB冲压钢保持器 95 200 45 1.9 2.6 11.66 DB pairing (P0, P6, P5 levels)
7319BWDB冲压钢保持器 95 200 45 1.7 2.4 11.96 DB pairing (P0, P6, P5 levels)
7020AWDB冲压钢保持器 100 150 24 3.6 5 2.96 DB pairing (P0, P6, P5 levels)
7020BWDB冲压钢保持器 100 150 24 99.5 127 2.74 DB pairing (P0, P6, P5 levels)
7220AWDB冲压钢保持器 100 180 34 233 251 6.44 DB pairing (P0, P6, P5 levels)
7220BWDB冲压钢保持器 100 180 34 212 229 6.56 DB pairing (P0, P6, P5 levels)
7320AWDB冲压钢保持器 100 215 47 335 385 14.58 DB pairing (P0, P6, P5 levels)
7320BWDB冲压钢保持器 100 215 47 310 355 14.86 DB pairing (P0, P6, P5 levels)
7021AWDB冲压钢保持器 105 160 26 130 163 3.68 DB pairing (P0, P6, P5 levels)
7021BWDB冲压钢保持器 105 160 26 116 147 3.46 DB pairing (P0, P6, P5 levels)
7221AWDB冲压钢保持器 105 190 36 254 283 7.68 DB pairing (P0, P6, P5 levels)
7221BWDB冲压钢保持器 105 190 36 231 258 7.84 DB pairing (P0, P6, P5 levels)