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）
7005BMDB车削铜保持器 25 47 12 16.6 13.4 0.182 DB pairing (P0, P6, P5 levels)
7205AMDB车削铜保持器 25 52 15 26.3 20.5 0.26 DB pairing (P0, P6, P5 levels)
7205BMDB车削铜保持器 25 52 15 24 18.8 0.266 DB pairing (P0, P6, P5 levels)
7305CMDB车削铜保持器 25 62 17 42.8 30.6 0.486 DB pairing (P0, P6, P5 levels)
7305AMDB车削铜保持器 25 62 17 43 31.5 0.47 DB pairing (P0, P6, P5 levels)
7305BMDB车削铜保持器 25 62 17 39.5 29.3 0.482 DB pairing (P0, P6, P5 levels)
7405AMDB车削铜保持器 25 80 21 64.5 46.3 1.054 DB pairing (P0, P6, P5 levels)
7405BMDB车削铜保持器 25 80 21 60 43 1.054 DB pairing (P0, P6, P5 levels)
7006AMDB车削铜保持器 30 55 13 23.6 20.2 0.232 DB pairing (P0, P6, P5 levels)
7006BMDB车削铜保持器 30 55 13 21.3 18.4 0.266 DB pairing (P0, P6, P5 levels)
7206AMDB车削铜保持器 30 62 16 36.5 29.5 0.394 DB pairing (P0, P6, P5 levels)
7206BMDB车削铜保持器 30 62 16 33.5 27 0.404 DB pairing (P0, P6, P5 levels)
7306CMDB车削铜保持器 30 72 19 52.5 40.5 0.724 DB pairing (P0, P6, P5 levels)
7306AMDB车削铜保持器 30 72 19 54.5 41.5 0.692 DB pairing (P0, P6, P5 levels)
7306BMDB车削铜保持器 30 72 19 50.5 38.5 0.708 DB pairing (P0, P6, P5 levels)
7406AMDB车削铜保持器 30 90 23 77.3 56.9 1.372 DB pairing (P0, P6, P5 levels)
7406BMDB车削铜保持器 30 90 23 71.8 52.8 1.372 DB pairing (P0, P6, P5 levels)
7007AMDB车削铜保持器 35 62 14 29.7 26.8 0.306 DB pairing (P0, P6, P5 levels)
7007BMDB车削铜保持器 35 62 14 25.7 22.8 0.34 DB pairing (P0, P6, P5 levels)
7207AMDB车削铜保持器 35 72 17 48.5 40 0.574 DB pairing (P0, P6, P5 levels)