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）
7915ACTNDB尼龙保持器 75 105 16 44 55.5 0.71 DB pairing (P0, P6, P5 levels)
7015ATNDB尼龙保持器 75 115 20 73 87.5 1.322 DB pairing (P0, P6, P5 levels)
7015BTNDB尼龙保持器 75 115 20 63.5 75.2 1.38 DB pairing (P0, P6, P5 levels)
7215ATNDB尼龙保持器 75 130 25 123 129 2.38 DB pairing (P0, P6, P5 levels)
7215BTNDB尼龙保持器 75 130 25 112 117 2.44 DB pairing (P0, P6, P5 levels)
7315CTNDB尼龙保持器 75 160 37 223 208 6.3 DB pairing (P0, P6, P5 levels)
7315ATNDB尼龙保持器 75 160 37 221 212 6.26 DB pairing (P0, P6, P5 levels)
7315BTNDB尼龙保持器 75 160 37 202 195 6.38 DB pairing (P0, P6, P5 levels)
7415ATNDB尼龙保持器 75 190 45 278 282 11.8 DB pairing (P0, P6, P5 levels)
7415BTNDB尼龙保持器 75 190 45 257 261 11.8 DB pairing (P0, P6, P5 levels)
7816BTNDB尼龙保持器 80 100 10 33.2 38 0.202 DB pairing (P0, P6, P5 levels)
7916ACTNDB尼龙保持器 80 110 16 44.5 58 0.76 DB pairing (P0, P6, P5 levels)
7016ATNDB尼龙保持器 80 125 22 89.5 106 1.76 DB pairing (P0, P6, P5 levels)
7016BTNDB尼龙保持器 80 125 22 77.7 91.3 1.86 DB pairing (P0, P6, P5 levels)
7216ATNDB尼龙保持器 80 140 26 145 152 2.92 DB pairing (P0, P6, P5 levels)
7216BTNDB尼龙保持器 80 140 26 131 139 2.98 DB pairing (P0, P6, P5 levels)
7316CTNDB尼龙保持器 80 170 39 242 233 7.7 DB pairing (P0, P6, P5 levels)
7316ATNDB尼龙保持器 80 170 39 239 238 7.42 DB pairing (P0, P6, P5 levels)
7316BTNDB尼龙保持器 80 170 39 219 218 7.58 DB pairing (P0, P6, P5 levels)
7416ATNDB尼龙保持器 80 200 48 313 332 12 DB pairing (P0, P6, P5 levels)