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）
7011AWDB冲压钢保持器 55 90 18 52.5 55.5 0.782 DB pairing (P0, P6, P5 levels)
7011BWDB冲压钢保持器 55 90 18 45.4 47.5 0.84 DB pairing (P0, P6, P5 levels)
7211AWDB冲压钢保持器 55 100 21 83 79 1.226 DB pairing (P0, P6, P5 levels)
7211BWDB冲压钢保持器 55 100 21 75 72 1.254 DB pairing (P0, P6, P5 levels)
7311AWDB冲压钢保持器 55 120 29 139 123 2.82 DB pairing (P0, P6, P5 levels)
7311BWDB冲压钢保持器 55 120 29 128 113 2.9 DB pairing (P0, P6, P5 levels)
7411AWDB冲压钢保持器 55 140 33 192 165 4.72 DB pairing (P0, P6, P5 levels)
7411BWDB冲压钢保持器 55 140 33 179 153 4.72 DB pairing (P0, P6, P5 levels)
7012AWDB冲压钢保持器 60 95 18 53.5 59 0.834 DB pairing (P0, P6, P5 levels)
7012BWDB冲压钢保持器 60 95 18 46.4 50.7 0.9 DB pairing (P0, P6, P5 levels)
7212AWDB冲压钢保持器 60 110 22 100 97.5 1.596 DB pairing (P0, P6, P5 levels)
7212BWDB冲压钢保持器 60 110 22 91 89 1.63 DB pairing (P0, P6, P5 levels)
7312AWDB冲压钢保持器 60 130 31 159 143 3.48 DB pairing (P0, P6, P5 levels)
7312BWDB冲压钢保持器 60 130 31 146 131 3.56 DB pairing (P0, P6, P5 levels)
7412AWDB冲压钢保持器 60 150 35 209 187 5.7 DB pairing (P0, P6, P5 levels)
7412BWDB冲压钢保持器 60 150 35 194 173 5.7 DB pairing (P0, P6, P5 levels)
7013AWDB冲压钢保持器 65 100 18 56.5 65.5 0.91 DB pairing (P0, P6, P5 levels)
7013BWDB冲压钢保持器 65 100 18 48.9 56.6 0.94 DB pairing (P0, P6, P5 levels)
7213AWDB冲压钢保持器 65 120 23 114 116 2.06 DB pairing (P0, P6, P5 levels)
7213BWDB冲压钢保持器 65 120 23 103 105 2.1 DB pairing (P0, P6, P5 levels)