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）
7084ATNDB尼龙保持器 420 620 90 995 2380 180.6 DB pairing (P0, P6, P5 levels)
7084BTNDB尼龙保持器 420 620 90 890 2150 181.2 DB pairing (P0, P6, P5 levels)
7284ATNDB尼龙保持器 420 760 109 1260 3250 456 DB pairing (P0, P6, P5 levels)
7284BTNDB尼龙保持器 420 760 109 1130 2920 440 DB pairing (P0, P6, P5 levels)
7888ATNDB尼龙保持器 440 540 46 505 1130 44 DB pairing (P0, P6, P5 levels)
7988ATNDB尼龙保持器 440 600 74 720 1720 118.6 DB pairing (P0, P6, P5 levels)
7088ATNDB尼龙保持器 440 650 94 1050 2630 206 DB pairing (P0, P6, P5 levels)
7892ATNDB尼龙保持器 460 580 56 620 1450 67 DB pairing (P0, P6, P5 levels)
7992ATNDB尼龙保持器 460 620 74 730 1770 123.2 DB pairing (P0, P6, P5 levels)
7092ATNDB尼龙保持器 460 680 100 117 300 238 DB pairing (P0, P6, P5 levels)
7896ATNDB尼龙保持器 480 600 56 635 1520 69.8 DB pairing (P0, P6, P5 levels)
7996ATNDB尼龙保持器 480 650 78 860 2180 143.6 DB pairing (P0, P6, P5 levels)
7096ATNDB尼龙保持器 480 700 100 1170 3050 246 DB pairing (P0, P6, P5 levels)
78/500ATNDB尼龙保持器 500 620 56 640 1560 73 DB pairing (P0, P6, P5 levels)
79/500ATNDB尼龙保持器 500 670 78 875 2250 149.8 DB pairing (P0, P6, P5 levels)
70/500ATNDB尼龙保持器 500 720 100 1190 3200 258 DB pairing (P0, P6, P5 levels)
79/530ACTNDB尼龙保持器 530 710 82 1000 2600 172 DB pairing (P0, P6, P5 levels)
79/560ATNDB尼龙保持器 560 750 85 1010 2760 210 DB pairing (P0, P6, P5 levels)
78/630ATNDB尼龙保持器 630 780 69 815 2270 144.4 DB pairing (P0, P6, P5 levels)
78/670ATNDB尼龙保持器 670 820 69 770 2150 152.6 DB pairing (P0, P6, P5 levels)