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）
7411AMDB车削铜保持器 55 140 33 192 165 4.72 DB pairing (P0, P6, P5 levels)
7411BMDB车削铜保持器 55 140 33 179 153 4.72 DB pairing (P0, P6, P5 levels)
7012AMDB车削铜保持器 60 95 18 53.5 59 0.834 DB pairing (P0, P6, P5 levels)
7012BMDB车削铜保持器 60 95 18 46.4 50.7 0.9 DB pairing (P0, P6, P5 levels)
7212AMDB车削铜保持器 60 110 22 100 97.5 1.596 DB pairing (P0, P6, P5 levels)
7212BMDB车削铜保持器 60 110 22 91 89 1.63 DB pairing (P0, P6, P5 levels)
7312CMDB车削铜保持器 60 130 31 161 141 3.62 DB pairing (P0, P6, P5 levels)
7312AMDB车削铜保持器 60 130 31 159 143 3.48 DB pairing (P0, P6, P5 levels)
7312BMDB车削铜保持器 60 130 31 146 131 3.56 DB pairing (P0, P6, P5 levels)
7412AMDB车削铜保持器 60 150 35 209 187 5.7 DB pairing (P0, P6, P5 levels)
7412BMDB车削铜保持器 60 150 35 194 173 5.7 DB pairing (P0, P6, P5 levels)
7013AMDB车削铜保持器 65 100 18 56.5 65.5 0.91 DB pairing (P0, P6, P5 levels)
7013BMDB车削铜保持器 65 100 18 48.9 56.6 0.94 DB pairing (P0, P6, P5 levels)
7213AMDB车削铜保持器 65 120 23 114 116 2.06 DB pairing (P0, P6, P5 levels)
7213BMDB车削铜保持器 65 120 23 103 105 2.1 DB pairing (P0, P6, P5 levels)
7313CMDB车削铜保持器 65 140 33 182 161 4.44 DB pairing (P0, P6, P5 levels)
7313AMDB车削铜保持器 65 140 33 180 164 4.24 DB pairing (P0, P6, P5 levels)
7313BMDB车削铜保持器 65 140 33 166 151 4.34 DB pairing (P0, P6, P5 levels)
7413AMDB车削铜保持器 65 160 37 226 209 6.82 DB pairing (P0, P6, P5 levels)
7413BMDB车削铜保持器 65 160 37 209 194 6.82 DB pairing (P0, P6, P5 levels)