NTN - Large Bearings

Angular Contact Ball Bearings SingleDuplex
Db
r1a
ra
da
Da
ra
ra
da
Equivalent bearing load
dynamic
PrXFrYFa
Contact
angle
30˚
40˚
e
0.80
1.14
Single
DB, DF
Fa Fre Fa Fre Fa Fre Fa Fre
X Y X Y X Y X Y
1
1
0
0
0.39 0.76
0.35 0.57
1
1
0.78
0.55
0.63
0.57
1.24
0.93
static
PorXo FrYo Fa
Contact
angle
30˚
40˚
Single
Xo
0.5
0.5
DB, DF
Yo Xo Yo
0.33 1 0.66
0.26 1 0.52
For single, When PorFr use PorFr
Basic load ratings Bearing Load Abutment and
dynamic static dynamic static numbers center fillet dimensions
(duplex) (duplex) mm mm
KN kgf a d a D a r as r las
C r C or C r C or DB DF DB DF min max max max
640 1,560 65,000 159,000 DB DF 379.5 267.5 514 606 2.5 1
875 2,250 89,000 229,000 DB DF 416 260 522 648 4 2
1,190 3,200 122,000 325,000 DB DF 452.5 252.5 528 692 5 2.5
1,080 2,890 111,000 295,000 DB DF 446.5 246.5 522 678 4 2
1,010 2,760 103,000 281,000 DB DF 463.5 293.5 582 728 4 2
815 2,270 83,000 232,000 DB DF 476 338 648 762 3 1.5
770 2,150 78,500 219,000 DB DF 499 361 688 802 3 1.5
680 1,890 69,500 193,000 DB DF 694 556 688 802 3 1.5
860 2,580 88,000 263,000 DB DF 536 388 718 882 3 1.5
2,340 9,250 238,000 945,000 DB DF 828.5 568.5 1,036 1,384 6 3
1,430 5,350 146,000 545,000 DB DF 775.5 575.5 1,088 1,252 5 2.5
B-31