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）
7016AWDB冲压钢保持器 80 125 22 89.5 106 1.76 DB pairing (P0, P6, P5 levels)
7016BWDB冲压钢保持器 80 125 22 77.7 91.3 1.86 DB pairing (P0, P6, P5 levels)
7216AWDB冲压钢保持器 80 140 26 145 152 2.92 DB pairing (P0, P6, P5 levels)
7216BWDB冲压钢保持器 80 140 26 131 139 2.98 DB pairing (P0, P6, P5 levels)
7316AWDB冲压钢保持器 80 170 39 239 238 7.42 DB pairing (P0, P6, P5 levels)
7316BWDB冲压钢保持器 80 170 39 219 218 7.58 DB pairing (P0, P6, P5 levels)
7416AWDB冲压钢保持器 80 200 48 313 332 12 DB pairing (P0, P6, P5 levels)
7416BWDB冲压钢保持器 80 200 48 290 307 12 DB pairing (P0, P6, P5 levels)
7017AWDB冲压钢保持器 85 130 22 3.4 4.5 1.826 DB pairing (P0, P6, P5 levels)
7017BWDB冲压钢保持器 85 130 22 79.3 96.7 1.94 DB pairing (P0, P6, P5 levels)
7217AWDB冲压钢保持器 85 150 28 3 4.3 3.66 DB pairing (P0, P6, P5 levels)
7217BWDB冲压钢保持器 85 150 28 2.2 3 3.74 DB pairing (P0, P6, P5 levels)
7317AWDB冲压钢保持器 85 180 41 2.2 2.8 8.66 DB pairing (P0, P6, P5 levels)
7317BWDB冲压钢保持器 85 180 41 1.9 2.6 8.84 DB pairing (P0, P6, P5 levels)
7417AWDB冲压钢保持器 85 210 52 331 360 17.08 DB pairing (P0, P6, P5 levels)
7417BWDB冲压钢保持器 85 210 52 307 334 17.08 DB pairing (P0, P6, P5 levels)
7018AWDB冲压钢保持器 90 140 24 3.2 4.3 2.38 DB pairing (P0, P6, P5 levels)
7018BWDB冲压钢保持器 90 140 24 95 114 2.52 DB pairing (P0, P6, P5 levels)
7218AWDB冲压钢保持器 90 160 30 2.8 4 4.5 DB pairing (P0, P6, P5 levels)
7218BWDB冲压钢保持器 90 160 30 2 2.8 4.58 DB pairing (P0, P6, P5 levels)