Ball and Roller Bearings - Ntn-snr.com

High Speed Single and Duplex Arrangements
Db
r1a
ra
da
Da
ra
ra
da
Equivalent bearing load
dynamic
PrXFrYFa
Single, DT
DB, DF
Fa
e FaFre FaFre FaFre FaFre
Cor X Y X Y X Y X Y
0.010 0.37
0.020 0.39
0.040 0.41
0.070 0.44
1.51
1.45
1.36
1.28
1.70
1.62
1.52
1.43
2.46
2.35
2.21
2.08
0.10 0.46 1 0 0.44 1.22 1 1.37 0.72 1.98
0.15
0.20
0.30
0.40
0.50
0.49
0.51
0.55
0.56
0.56
1.15
1.10
1.02
1.00
1.00
1.29
1.23
1.15
1.12
1.12
1.87
1.78
1.66
1.63
1.63
static
PorXo FrYo Fa
Single, DT
Xo
0.5
DB, DF
Yo Xo Yo
0.46 1 0.92
For single and DT arrangement,
When PorFr use PorFr
Basic load ratings Limiting speeds 1 Bearing numbers Abutment and fillet dimensions
dynamic static dynamic static (duplex)
(duplex) (duplex) mm
kN kgf rpm
DB DF DT
d a D a D b r as r 1as
C r C or C r C or grease oil min max max max max
7.95 4.40 815 450 34,000 46,000 DB DF DT 12.5 23.5 24.8 0.3 0.15
8.80 5.25 900 540 32,000 43,000 DB DF DT 14.5 25.5 27.5 0.6 0.3
8.80 5.25 900 540 31,000 41,000 DB DF DT 14.5 25.5 26.8 0.3 0.15
11.5 6.95 1,170 705 29,000 38,000 DB DF DT 16.5 27.5 29.5 0.6 0.3
10.1 6.75 1,030 690 27,000 36,000 DB DF DT 17.5 29.5 30.8 0.3 0.15
14.6 9.05 1,490 920 25,000 33,000 DB DF DT 19.5 30.5 32.5 0.6 0.3
21.6 13.7 2,200 1,400 23,000 30,000 DB DF DT 20.5 36.5 37.5 1 0.6
12.5 8.25 1,280 840 24,000 33,000 DB DF DT 19.5 32.5 33.8 0.3 0.15
18.1 11.5 1,850 1,180 23,000 30,000 DB DF DT 21.5 35.5 37.5 0.6 0.3
25.6 16.5 2,610 1,680 21,000 27,000 DB DF DT 22.5 41.5 42.5 1 0.6
17.0 12.1 1,740 1,230 22,000 29,000 DB DF DT 24.5 37.5 39.5 0.6 0.3
23.7 16.3 2,420 1,670 20,000 27,000 DB DF DT 25.5 41.5 42.5 1 0.6
30.0 19.9 3,050 2,030 18,000 24,000 DB DF DT 27 45 47.5 1 0.6
8.20 7.65 835 780 21,000 28,000 DB DF DT 27.5 34.5 35.8 0.3 0.15
12.7 10.8 1,300 1,110 19,000 26,000 DB DF DT 27.5 39.5 40.8 0.3 0.15
19.0 14.9 1,940 1,510 18,000 24,000 DB DF DT 29.5 42.5 44.5 0.6 0.3
27.0 20.5 2,750 2,090 17,000 22,000 DB DF DT 30.5 46.5 47.5 1 0.6
43.0 30.5 4,350 3,100 15,000 20,000 DB DF DT 32 55 57.5 1 0.6
8.70 9.00 890 920 18,000 24,000 DB DF DT 32.5 39.5 40.8 0.3 0.15
13.5 12.5 1,380 1,280 17,000 22,000 DB DF DT 32.5 44.5 45.8 0.3 0.15
24.6 20.6 2,510 2,100 16,000 21,000 DB DF DT 35.5 49.5 50.5 1 0.6
37.5 29.5 3,800 3,000 14,000 19,000 DB DF DT 35.5 56.5 57.5 1 0.6
52.5 40.5 5,350 4,150 13,000 17,000 DB DF DT 37 65 67.5 1 0.6
9.40 10.5 960 1,070 16,000 21,000 DB DF DT 37.5 44.5 45.8 0.3 0.15
21.4 19.3 2,180 1,970 15,000 20,000 DB DF DT 39.5 50.5 52.5 0.6 0.3
31.0 27.3 3,150 2,790 14,000 18,000 DB DF DT 40.5 56.5 57.5 1 0.6
49.5 40.0 5,050 4,050 13,000 17,000 DB DF DT 42 65 67.5 1 0.6
65.5 51.5 6,700 5,250 11,000 15,000 DB DF DT 43.5 71.5 74.5 1.5 1
9.80 11.5 1,000 1,170 14,000 19,000 DB DF DT 42.5 49.5 50.8 0.3 0.15
22.7 22.3 2,310 2,270 13,000 18,000 DB DF DT 44.5 57.5 59.5 0.6 0.3
33.5 32.0 3,400 3,250 12,000 16,000 DB DF DT 45.5 62.5 63.5 1 0.6
59.0 50.5 6,000 5,150 11,000 15,000 DB DF DT 47 73 75.5 1 0.6
3 For back-to-back and face-to-face duplex arrangements, find with the formula 2F / C .
Note: This bearing has a contact angle of 15and is manufactured with accuracies of JIS Class 5 or higher.
B-57