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）
7934BTNDB尼龙保持器 170 230 28 147 241 6.72 DB pairing (P0, P6, P5 levels)
7034ATNDB尼龙保持器 170 260 42 300 430 15.8 DB pairing (P0, P6, P5 levels)
7034BTNDB尼龙保持器 170 260 42 270 385 15.54 DB pairing (P0, P6, P5 levels)
7234ATNDB尼龙保持器 170 310 52 480 715 34.6 DB pairing (P0, P6, P5 levels)
7234BTNDB尼龙保持器 170 310 52 435 650 35.2 DB pairing (P0, P6, P5 levels)
7334CTNDB尼龙保持器 170 360 72 679 1040 62.4 DB pairing (P0, P6, P5 levels)
7334ATNDB尼龙保持器 170 360 72 630 970 71.6 DB pairing (P0, P6, P5 levels)
7334BTNDB尼龙保持器 170 360 72 575 890 71.2 DB pairing (P0, P6, P5 levels)
7836ATNDB尼龙保持器 180 225 22 111 204 3.86 DB pairing (P0, P6, P5 levels)
7836BTNDB尼龙保持器 180 225 22 99 182 3.84 DB pairing (P0, P6, P5 levels)
7936CTNDB尼龙保持器 180 250 33 236 370 9.8 DB pairing (P0, P6, P5 levels)
7936ATNDB尼龙保持器 180 250 33 213 335 9.94 DB pairing (P0, P6, P5 levels)
7936BTNDB尼龙保持器 180 250 33 190 300 9.68 DB pairing (P0, P6, P5 levels)
7036ATNDB尼龙保持器 180 280 46 335 505 21 DB pairing (P0, P6, P5 levels)
7036BTNDB尼龙保持器 180 280 46 300 455 20.4 DB pairing (P0, P6, P5 levels)
7236ATNDB尼龙保持器 180 320 52 495 770 36.2 DB pairing (P0, P6, P5 levels)
7236BTNDB尼龙保持器 180 320 52 450 700 36.8 DB pairing (P0, P6, P5 levels)
7336ATNDB尼龙保持器 180 380 75 665 1070 84.2 DB pairing (P0, P6, P5 levels)
7336BTNDB尼龙保持器 180 380 75 605 975 85.2 DB pairing (P0, P6, P5 levels)
7838ATNDB尼龙保持器 190 240 24 133 240 4.94 DB pairing (P0, P6, P5 levels)