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）
7836BMDB车削铜保持器 180 225 22 99 182 3.84 DB pairing (P0, P6, P5 levels)
7936CMDB车削铜保持器 180 250 33 236 370 9.8 DB pairing (P0, P6, P5 levels)
7936AMDB车削铜保持器 180 250 33 213 335 9.94 DB pairing (P0, P6, P5 levels)
7936BMDB车削铜保持器 180 250 33 190 300 9.68 DB pairing (P0, P6, P5 levels)
BA180-2ADB车削铜保持器 180 259.5 33 290 420 11.5 DB pairing (P0, P6, P5 levels)
BT180-2BDB车削铜保持器 180 259.5 33 224 330 11.4 DB pairing (P0, P6, P5 levels)
7036AMDB车削铜保持器 180 280 46 335 505 21 DB pairing (P0, P6, P5 levels)
7036BMDB车削铜保持器 180 280 46 300 455 20.4 DB pairing (P0, P6, P5 levels)
7236AMDB车削铜保持器 180 320 52 495 770 36.2 DB pairing (P0, P6, P5 levels)
7236BMDB车削铜保持器 180 320 52 450 700 36.8 DB pairing (P0, P6, P5 levels)
7336AMDB车削铜保持器 180 380 75 665 1070 84.2 DB pairing (P0, P6, P5 levels)
7336BMDB车削铜保持器 180 380 75 605 975 85.2 DB pairing (P0, P6, P5 levels)
7838AMDB车削铜保持器 190 240 24 133 240 4.94 DB pairing (P0, P6, P5 levels)
7838BMDB车削铜保持器 190 240 24 118 214 4.94 DB pairing (P0, P6, P5 levels)
BT190-6BDB车削铜保持器 190 255 33 175 276 8.32 DB pairing (P0, P6, P5 levels)
7938CMDB车削铜保持器 190 260 33 239 385 9.96 DB pairing (P0, P6, P5 levels)
7938AMDB车削铜保持器 190 260 33 216 350 10.04 DB pairing (P0, P6, P5 levels)
7938BMDB车削铜保持器 190 260 33 192 315 10.14 DB pairing (P0, P6, P5 levels)
BA190-1ADB车削铜保持器 190 269.5 33 215 335 11.9 DB pairing (P0, P6, P5 levels)
BT190-2BDB车削铜保持器 190 269.5 33 217 330 12.1 DB pairing (P0, P6, P5 levels)