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）
7000AWDB冲压钢保持器 10 26 8 8.75 5.2 0.038 DB pairing (P0, P6, P5 levels)
7000BWDB冲压钢保持器 10 26 8 7.55 4.35 0.042 DB pairing (P0, P6, P5 levels)
7200AWDB冲压钢保持器 10 30 9 8.8 5.4 0.064 DB pairing (P0, P6, P5 levels)
7200BWDB冲压钢保持器 10 30 9 8.1 5 0.064 DB pairing (P0, P6, P5 levels)
7300AWDB冲压钢保持器 10 35 11 15.1 8.6 0.106 DB pairing (P0, P6, P5 levels)
7300BWDB冲压钢保持器 10 35 11 14.2 8.1 0.108 DB pairing (P0, P6, P5 levels)
7001AWDB冲压钢保持器 12 28 8 9.4 5.95 0.042 DB pairing (P0, P6, P5 levels)
7001BWDB冲压钢保持器 12 28 8 8.1 5.05 0.048 DB pairing (P0, P6, P5 levels)
7201AWDB冲压钢保持器 12 32 10 13 8.05 0.074 DB pairing (P0, P6, P5 levels)
7201BWDB冲压钢保持器 12 32 10 12.1 7.5 0.076 DB pairing (P0, P6, P5 levels)
7301AWDB冲压钢保持器 12 37 12 15.4 9 0.12 DB pairing (P0, P6, P5 levels)
7301BWDB冲压钢保持器 12 37 12 14.4 8.4 0.124 DB pairing (P0, P6, P5 levels)
7002AWDB冲压钢保持器 15 32 9 9.95 6.85 0.06 DB pairing (P0, P6, P5 levels)
7002BWDB冲压钢保持器 15 32 9 9.05 6.3 0.07 DB pairing (P0, P6, P5 levels)
7202AWDB冲压钢保持器 15 35 11 14 9.3 0.09 DB pairing (P0, P6, P5 levels)
7202BWDB冲压钢保持器 15 35 11 12.9 8.6 0.092 DB pairing (P0, P6, P5 levels)
7302AWDB冲压钢保持器 15 42 13 21.8 14.2 0.168 DB pairing (P0, P6, P5 levels)
7302BWDB冲压钢保持器 15 42 13 20.2 13.2 0.172 DB pairing (P0, P6, P5 levels)
7003AWDB冲压钢保持器 17 35 10 10.4 7.65 0.08 DB pairing (P0, P6, P5 levels)
7003BWDB冲压钢保持器 17 35 10 9.9 7.5 0.09 DB pairing (P0, P6, P5 levels)