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）
7006AWDB冲压钢保持器 30 55 13 23.6 20.2 0.232 DB pairing (P0, P6, P5 levels)
7006BWDB冲压钢保持器 30 55 13 21.3 18.4 0.266 DB pairing (P0, P6, P5 levels)
7206AWDB冲压钢保持器 30 62 16 36.5 29.5 0.394 DB pairing (P0, P6, P5 levels)
7206BWDB冲压钢保持器 30 62 16 33.5 27 0.404 DB pairing (P0, P6, P5 levels)
7306AWDB冲压钢保持器 30 72 19 54.5 41.5 0.692 DB pairing (P0, P6, P5 levels)
7306BWDB冲压钢保持器 30 72 19 50.5 38.5 0.708 DB pairing (P0, P6, P5 levels)
7406AWDB冲压钢保持器 30 90 23 77.3 56.9 1.372 DB pairing (P0, P6, P5 levels)
7406BWDB冲压钢保持器 30 90 23 71.8 52.8 1.372 DB pairing (P0, P6, P5 levels)
7007AWDB冲压钢保持器 35 62 14 29.7 26.8 0.306 DB pairing (P0, P6, P5 levels)
7007BWDB冲压钢保持器 35 62 14 25.7 22.8 0.34 DB pairing (P0, P6, P5 levels)
7207AWDB冲压钢保持器 35 72 17 48.5 40 0.574 DB pairing (P0, P6, P5 levels)
7207BWDB冲压钢保持器 35 72 17 44 36.5 0.588 DB pairing (P0, P6, P5 levels)
7307AWDB冲压钢保持器 35 80 21 65 52.5 0.928 DB pairing (P0, P6, P5 levels)
7307BWDB冲压钢保持器 35 80 21 59.5 48.5 0.948 DB pairing (P0, P6, P5 levels)
7407AWDB冲压钢保持器 35 100 25 98.2 73.9 1.9 DB pairing (P0, P6, P5 levels)
7407BWDB冲压钢保持器 35 100 25 91.3 68.6 1.9 DB pairing (P0, P6, P5 levels)
7008AWDB冲压钢保持器 40 68 15 31.5 31 0.38 DB pairing (P0, P6, P5 levels)
7008BWDB冲压钢保持器 40 68 15 27.4 26.4 0.42 DB pairing (P0, P6, P5 levels)
7208AWDB冲压钢保持器 40 80 18 57.5 50.5 0.75 DB pairing (P0, P6, P5 levels)
7208BWDB冲压钢保持器 40 80 18 52 46 0.766 DB pairing (P0, P6, P5 levels)