Ball and Roller Bearings - Ntn-snr.com

Single and Duplex Arrangements
Db
r1a
ra
da
Da
ra
r1a
da
30˚
40˚
0.80
1.14
1
1
0
0
0.39 0.76
0.35 0.57
1
1
0.78
0.55
0.63
0.57
Equivalent bearing load
dynamic
PrXFrYFa
Contact
e Fa Fre Fa Fre Fa Fre Fa Fre
Single, DT
DB, DF
angle X Y X Y X Y X Y
static
PorXo FrYo Fa
Contact
Single, DT
DB, DF
angle Xo Yo Xo Yo
30˚ 0.5 0.33 1 0.66
40˚ 0.5 0.26 1 0.52
For single and DT arrangement,
When PorFr use PorFr
1.24
0.93
Basic load ratings Limiting speeds Bearing numbers 1 Abutment and fillet dimensions
dynamic static dynamic static (duplex)
(duplex) (duplex) rpm mm
kN
kgf
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
152 197 15,500 20,100 2,900 3,800 DB DF DT 130 170 174.5 2 1
297 355 30,500 36,000 2,600 3,400 DB DF DT 132 203 208 2 1
269 325 27,400 33,000 2,300 3,000 DB DF DT 132 203 208 2 1
400 505 41,000 51,500 2,300 3,100 DB DF DT 134 246 253 2.5 1
365 460 37,500 47,000 2,000 2,700 DB DF DT 134 246 253 2.5 1
121 175 12,400 17,800 2,800 3,800 DB DF DT 138.5 171.5 174.5 1.5 1
191 251 19,400 25,600 2,600 3,500 DB DF DT 140 190 194.5 2 1
320 395 32,500 40,500 2,400 3,100 DB DF DT 144 216 223 2.5 1
288 360 29,400 36,500 2,100 2,700 DB DF DT 144 216 223 2.5 1
445 585 45,500 59,500 2,100 2,800 DB DF DT 148 262 271.5 3 1.5
405 535 41,500 54,500 1,900 2,500 DB DF DT 148 262 271.5 3 1.5
123 180 12,500 18,300 2,600 3,500 DB DF DT 148.5 181.5 184.5 1.5 1
194 265 19,800 27,000 2,400 3,300 DB DF DT 150 200 204.5 2 1
330 430 33,500 44,000 2,200 2,900 DB DF DT 154 236 243 2.5 1
297 390 30,500 40,000 1,900 2,500 DB DF DT 154 236 243 2.5 1
490 670 50,000 68,500 2,000 2,600 DB DF DT 158 282 291.5 3 1.5
445 615 45,500 63,000 1,700 2,300 DB DF DT 158 282 291.5 3 1.5
158 234 16,100 23,900 2,400 3,300 DB DF DT 160 200 204.5 2 1
222 305 22,700 31,500 2,300 3,000 DB DF DT 162 213 218 2 1
375 515 38,500 53,000 2,000 2,700 DB DF DT 164 256 263 2.5 1
340 470 34,500 48,000 1,800 2,400 DB DF DT 164 256 263 2.5 1
535 765 54,500 78,000 1,800 2,400 DB DF DT 168 302 311.5 3 1.5
490 700 50,000 71,500 1,600 2,100 DB DF DT 168 302 311.5 3 1.5
160 241 16,300 24,600 2,300 3,000 DB DF DT 170 210 214.5 2 1
252 355 25,700 36,000 2,100 2,800 DB DF DT 172 228 233 2 1
425 615 43,500 62,500 1,900 2,500 DB DF DT 174 276 283 2.5 1
385 555 39,500 57,000 1,600 2,200 DB DF DT 174 276 283 2.5 1
565 845 57,500 86,000 1,700 2,300 DB DF DT 178 322 331.5 3 1.5
515 770 52,500 79,000 1,500 2,000 DB DF DT 178 322 331.5 3 1.5
165 257 16,900 26,200 2,100 2,800 DB DF DT 180 220 224.5 2 1
300 430 31,000 43,500 2,000 2,600 DB DF DT 182 248 253 2 1
480 715 49,000 73,000 1,800 2,400 DB DF DT 188 292 301.5 3 1.5
435 650 44,000 66,500 1,500 2,100 DB DF DT 188 292 301.5 3 1.5
630 970 64,500 99,000 1,600 2,100 DB DF DT 188 342 351.5 3 1.5
B-53