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）
7203AWDB冲压钢保持器 17 40 12 17.6 12 0.134 DB pairing (P0, P6, P5 levels)
7203BWDB冲压钢保持器 17 40 12 16.1 11 0.136 DB pairing (P0, P6, P5 levels)
7303AWDB冲压钢保持器 17 47 14 25.9 17.3 0.232 DB pairing (P0, P6, P5 levels)
7303BWDB冲压钢保持器 17 47 14 24 16 0.236 DB pairing (P0, P6, P5 levels)
7004AWDB冲压钢保持器 20 42 12 17.6 13.2 0.136 DB pairing (P0, P6, P5 levels)
7004BWDB冲压钢保持器 20 42 12 15.2 11.1 0.158 DB pairing (P0, P6, P5 levels)
7204AWDB冲压钢保持器 20 47 14 23.5 16.6 0.212 DB pairing (P0, P6, P5 levels)
7204BWDB冲压钢保持器 20 47 14 21.6 15.3 0.218 DB pairing (P0, P6, P5 levels)
7304AWDB冲压钢保持器 20 52 15 30.5 20.8 0.292 DB pairing (P0, P6, P5 levels)
7304BWDB冲压钢保持器 20 52 15 28.2 19.3 0.3 DB pairing (P0, P6, P5 levels)
7404AWDB冲压钢保持器 20 72 19 57.8 38.2 0.79 DB pairing (P0, P6, P5 levels)
7404BWDB冲压钢保持器 20 72 19 54.4 35.9 0.79 DB pairing (P0, P6, P5 levels)
7005AWDB冲压钢保持器 25 47 12 18.3 14.8 0.158 DB pairing (P0, P6, P5 levels)
7005BWDB冲压钢保持器 25 47 12 16.6 13.4 0.182 DB pairing (P0, P6, P5 levels)
7205AWDB冲压钢保持器 25 52 15 26.3 20.5 0.26 DB pairing (P0, P6, P5 levels)
7205BWDB冲压钢保持器 25 52 15 24 18.8 0.266 DB pairing (P0, P6, P5 levels)
7305AWDB冲压钢保持器 25 62 17 43 31.5 0.47 DB pairing (P0, P6, P5 levels)
7305BWDB冲压钢保持器 25 62 17 39.5 29.3 0.482 DB pairing (P0, P6, P5 levels)
7405AWDB冲压钢保持器 25 80 21 64.5 46.3 1.054 DB pairing (P0, P6, P5 levels)
7405BWDB冲压钢保持器 25 80 21 60 43 1.054 DB pairing (P0, P6, P5 levels)