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）
7802BTNDB尼龙保持器 15 24 5 4.32 2.8 0.014 DB pairing (P0, P6, P5 levels)
7902ACTNDB尼龙保持器 15 28 7 7.4 5.05 0.032 DB pairing (P0, P6, P5 levels)
7002ATNDB尼龙保持器 15 32 9 9.95 6.85 0.06 DB pairing (P0, P6, P5 levels)
7002BTNDB尼龙保持器 15 32 9 9.05 6.3 0.07 DB pairing (P0, P6, P5 levels)
7202ATNDB尼龙保持器 15 35 11 14 9.3 0.09 DB pairing (P0, P6, P5 levels)
7202BTNDB尼龙保持器 15 35 11 12.9 8.6 0.092 DB pairing (P0, P6, P5 levels)
7302CTNDB尼龙保持器 15 42 13 21.7 13.7 0.17 DB pairing (P0, P6, P5 levels)
7302ATNDB尼龙保持器 15 42 13 21.8 14.2 0.168 DB pairing (P0, P6, P5 levels)
7302BTNDB尼龙保持器 15 42 13 20.2 13.2 0.172 DB pairing (P0, P6, P5 levels)
7803BTNDB尼龙保持器 17 26 5 4.42 3.06 0.02 DB pairing (P0, P6, P5 levels)
7903ACTNDB尼龙保持器 17 30 7 7.75 5.6 0.034 DB pairing (P0, P6, P5 levels)
7003ATNDB尼龙保持器 17 35 10 10.4 7.65 0.08 DB pairing (P0, P6, P5 levels)
7003BTNDB尼龙保持器 17 35 10 9.9 7.5 0.09 DB pairing (P0, P6, P5 levels)
7203ATNDB尼龙保持器 17 40 12 17.6 12 0.134 DB pairing (P0, P6, P5 levels)
7203BTNDB尼龙保持器 17 40 12 16.1 11 0.136 DB pairing (P0, P6, P5 levels)
7303CTNDB尼龙保持器 17 47 14 25.7 16.8 0.24 DB pairing (P0, P6, P5 levels)
7303ATNDB尼龙保持器 17 47 14 25.9 17.3 0.232 DB pairing (P0, P6, P5 levels)
7303BTNDB尼龙保持器 17 47 14 24 16 0.236 DB pairing (P0, P6, P5 levels)
7804BTNDB尼龙保持器 20 32 7 7.28 5 0.036 DB pairing (P0, P6, P5 levels)
7904ACTNDB尼龙保持器 20 37 9 10.7 8.1 0.074 DB pairing (P0, P6, P5 levels)