NTN - Large Bearings

Angular Contact Ball Bearings SingleDuplex
B
2B
2B
r
r1
ra
r
r
ra
D
d
Da
da
d 5001,060mm
a
single
a
back-to-back
arrangement
(DB)
a
face-to-face
arrangement
(DF)
Boundary dimensions contact Basic load ratings Bearing Drawing 1 Load Mass
angle dynamic static dynamic static numbers No. center
mm single single single
kN kgf mm kg
d D B C r s min 2 r ls min
2
C r C or C r C or a (approx.)
500
560
630
670
700
1,000
1,060
620 56 3 1.1 30 395 780 40,000 79,500 78/500 A 189.5 36.5
670 78 5 2 30 540 1,120 55,000 115,000 79/500 A 208 74.9
720 100 6 3 30 735 1,590 75,000 163,000 70/500 A 226 129
700 100 5 2.5 30 670 1,450 68,000 147,000 SF10013 A 223 87.3
750 85 5 2 30 620 1,380 63,500 141,000 79/560 A 231.5 105
780 69 4 1.5 30 500 1,140 51,000 116,000 78/630A A 238 72.2
820 69 4 1.5 30 475 1,080 48,000 110,000 78/670 A 249.5 76.3
820 69 4 1.5 40 420 945 43,000 96,500 78/670B A 347 76.3
900 74 4 1.5 30 530 1,290 54,000 131,000 SF14001 A 268 117
1,420 130 7.5 4 30 1,440 4,650 147,000 470,000 SF20001 A 414.5 654
1,280 100 6 3 30 880 2,680 895,000 273,000 78/1060 A 387.5 255
1 Drawing details are shown in Page B-15.
2 Smallest allowable dimension for chamfer dimension r or r1.
B-30