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）
7048BMDB车削铜保持器 240 360 56 435 780 39.8 DB pairing (P0, P6, P5 levels)
7248AMDB车削铜保持器 240 440 72 705 1330 101.8 DB pairing (P0, P6, P5 levels)
7248BMDB车削铜保持器 240 440 72 635 1200 100.6 DB pairing (P0, P6, P5 levels)
7348AMDB车削铜保持器 240 500 95 920 1760 185 DB pairing (P0, P6, P5 levels)
7348BMDB车削铜保持器 240 500 95 835 1600 183.8 DB pairing (P0, P6, P5 levels)
BT250-6BDB车削铜保持器 250 340 38 275 445 19.1 DB pairing (P0, P6, P5 levels)
BA250-1ADB车削铜保持器 250 349.5 46 380 650 27.2 DB pairing (P0, P6, P5 levels)
7852AMDB车削铜保持器 260 320 28 185 380 9.38 DB pairing (P0, P6, P5 levels)
7852BMDB车削铜保持器 260 320 28 164 340 9.34 DB pairing (P0, P6, P5 levels)
7952AMDB车削铜保持器 260 360 46 375 660 28.6 DB pairing (P0, P6, P5 levels)
7952BMDB车削铜保持器 260 360 46 335 595 28.4 DB pairing (P0, P6, P5 levels)
BA260-4ADB车削铜保持器 260 369.5 46 395 695 31.4 DB pairing (P0, P6, P5 levels)
BT260-1BDB车削铜保持器 260 369.5 46 380 680 31.4 DB pairing (P0, P6, P5 levels)
BT260-2BDB车削铜保持器 260 369.5 46 380 680 31.4 DB pairing (P0, P6, P5 levels)
BT260-5BDB车削铜保持器 260 379.5 56 430 775 38.2 DB pairing (P0, P6, P5 levels)
7052AMDB车削铜保持器 260 400 65 565 1050 57.4 DB pairing (P0, P6, P5 levels)
7052BMDB车削铜保持器 260 400 65 505 945 58 DB pairing (P0, P6, P5 levels)
7252AMDB车削铜保持器 260 480 80 775 1500 130.6 DB pairing (P0, P6, P5 levels)
7252BMDB车削铜保持器 260 480 80 700 1360 131 DB pairing (P0, P6, P5 levels)
7352AMDB车削铜保持器 260 540 102 960 1920 230 DB pairing (P0, P6, P5 levels)