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）
7824ATNDB尼龙保持器 120 150 16 51.5 79.5 1.26 DB pairing (P0, P6, P5 levels)
7924ACTNDB尼龙保持器 120 165 22 110 154 2.3 DB pairing (P0, P6, P5 levels)
7924ATNDB尼龙保持器 120 165 22 99 139 3.32 DB pairing (P0, P6, P5 levels)
7024ATNDB尼龙保持器 120 180 28 166 213 4.9 DB pairing (P0, P6, P5 levels)
7024BTNDB尼龙保持器 120 180 28 148 192 4.54 DB pairing (P0, P6, P5 levels)
7224ATNDB尼龙保持器 120 215 40 297 355 12.44 DB pairing (P0, P6, P5 levels)
7224BTNDB尼龙保持器 120 215 40 269 325 12.52 DB pairing (P0, P6, P5 levels)
7324CTNDB尼龙保持器 120 260 55 431 542 25.2 DB pairing (P0, P6, P5 levels)
7324ATNDB尼龙保持器 120 260 55 400 505 29 DB pairing (P0, P6, P5 levels)
7324BTNDB尼龙保持器 120 260 55 365 460 28.8 DB pairing (P0, P6, P5 levels)
7826ATNDB尼龙保持器 130 165 18 68.5 106 1.82 DB pairing (P0, P6, P5 levels)
7926ACTNDB尼龙保持器 130 180 24 120 172 3.08 DB pairing (P0, P6, P5 levels)
7926ATNDB尼龙保持器 130 180 24 121 175 3.64 DB pairing (P0, P6, P5 levels)
7026ATNDB尼龙保持器 130 200 33 191 251 7.36 DB pairing (P0, P6, P5 levels)
7026BTNDB尼龙保持器 130 200 33 171 226 6.86 DB pairing (P0, P6, P5 levels)
7226ATNDB尼龙保持器 130 230 40 310 385 14.12 DB pairing (P0, P6, P5 levels)
7226BTNDB尼龙保持器 130 230 40 278 350 14.2 DB pairing (P0, P6, P5 levels)
7326CTNDB尼龙保持器 130 280 58 478 629 30.8 DB pairing (P0, P6, P5 levels)
7326ATNDB尼龙保持器 130 280 58 445 585 35 DB pairing (P0, P6, P5 levels)
7326BTNDB尼龙保持器 130 280 58 405 535 35.2 DB pairing (P0, P6, P5 levels)