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）
7230BTNDB尼龙保持器 150 270 45 365 510 22.4 DB pairing (P0, P6, P5 levels)
7330CTNDB尼龙保持器 150 320 65 607 891 44.8 DB pairing (P0, P6, P5 levels)
7330ATNDB尼龙保持器 150 320 65 515 745 52 DB pairing (P0, P6, P5 levels)
7330BTNDB尼龙保持器 150 320 65 470 680 51.8 DB pairing (P0, P6, P5 levels)
7832ATNDB尼龙保持器 160 200 20 89 159 2.78 DB pairing (P0, P6, P5 levels)
7832BTNDB尼龙保持器 160 200 20 79 142 2.76 DB pairing (P0, P6, P5 levels)
7932CTNDB尼龙保持器 160 220 28 173 265 6.2 DB pairing (P0, P6, P5 levels)
7932ATNDB尼龙保持器 160 220 28 156 241 6.22 DB pairing (P0, P6, P5 levels)
7932BTNDB尼龙保持器 160 220 28 139 216 6.22 DB pairing (P0, P6, P5 levels)
7032ATNDB尼龙保持器 160 240 38 252 355 11.54 DB pairing (P0, P6, P5 levels)
7032BTNDB尼龙保持器 160 240 38 225 320 10.9 DB pairing (P0, P6, P5 levels)
7232ATNDB尼龙保持器 160 290 48 425 615 28.2 DB pairing (P0, P6, P5 levels)
7232BTNDB尼龙保持器 160 290 48 385 555 28.4 DB pairing (P0, P6, P5 levels)
7332CTNDB尼龙保持器 160 340 68 640 980 52.8 DB pairing (P0, P6, P5 levels)
7332ATNDB尼龙保持器 160 340 68 565 845 61.4 DB pairing (P0, P6, P5 levels)
7332BTNDB尼龙保持器 160 340 68 515 770 61.6 DB pairing (P0, P6, P5 levels)
7834ATNDB尼龙保持器 170 215 22 109 192 3.7 DB pairing (P0, P6, P5 levels)
7834BTNDB尼龙保持器 170 215 22 96.5 171 3.66 DB pairing (P0, P6, P5 levels)
7934CTNDB尼龙保持器 170 230 28 183 297 6.72 DB pairing (P0, P6, P5 levels)
7934ATNDB尼龙保持器 170 230 28 165 269 6.78 DB pairing (P0, P6, P5 levels)