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）
7216AMDB车削铜保持器 80 140 26 145 152 2.92 DB pairing (P0, P6, P5 levels)
7216BMDB车削铜保持器 80 140 26 131 139 2.98 DB pairing (P0, P6, P5 levels)
7316CMDB车削铜保持器 80 170 39 242 233 7.7 DB pairing (P0, P6, P5 levels)
7316AMDB车削铜保持器 80 170 39 239 238 7.42 DB pairing (P0, P6, P5 levels)
7316BMDB车削铜保持器 80 170 39 219 218 7.58 DB pairing (P0, P6, P5 levels)
7416AMDB车削铜保持器 80 200 48 313 332 12 DB pairing (P0, P6, P5 levels)
7416BMDB车削铜保持器 80 200 48 290 307 12 DB pairing (P0, P6, P5 levels)
7017AMDB车削铜保持器 85 130 22 3.4 4.5 1.826 DB pairing (P0, P6, P5 levels)
7017BMDB车削铜保持器 85 130 22 79.3 96.7 1.94 DB pairing (P0, P6, P5 levels)
7217AMDB车削铜保持器 85 150 28 3 4.3 3.66 DB pairing (P0, P6, P5 levels)
7217BMDB车削铜保持器 85 150 28 2.2 3 3.74 DB pairing (P0, P6, P5 levels)
7317CMDB车削铜保持器 85 180 41 261 261 9.06 DB pairing (P0, P6, P5 levels)
7317AMDB车削铜保持器 85 180 41 2.2 2.8 8.66 DB pairing (P0, P6, P5 levels)
7317BMDB车削铜保持器 85 180 41 1.9 2.6 8.84 DB pairing (P0, P6, P5 levels)
7417AMDB车削铜保持器 85 210 52 331 360 17.08 DB pairing (P0, P6, P5 levels)
7417BMDB车削铜保持器 85 210 52 307 334 17.08 DB pairing (P0, P6, P5 levels)
7018AMDB车削铜保持器 90 140 24 3.2 4.3 2.38 DB pairing (P0, P6, P5 levels)
7018BMDB车削铜保持器 90 140 24 95 114 2.52 DB pairing (P0, P6, P5 levels)
7218AMDB车削铜保持器 90 160 30 2.8 4 4.5 DB pairing (P0, P6, P5 levels)
7218BMDB车削铜保持器 90 160 30 2 2.8 4.58 DB pairing (P0, P6, P5 levels)