NTN - Large Bearings

Angular Contact Ball Bearings SingleDuplex
Db
r1a
ra
da
Da
ra
ra
da
Equivalent bearing load
dynamic
PrXFrYFa
Contact
angle
e
Single
DB, DF
Fa Fre Fa Fre Fa Fre Fa Fre
X Y X Y X Y X Y
0.63
0.57
1.24
0.93
30˚ 0.80 1 0 0.39 0.76 1 0.78
40˚ 1.14 1 0 0.35 0.57 1 0.55
static
PorXo FrYo Fa
Contact
Single
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, 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
191 251 19,400 25,600 DB DF 161 95 140 190 2 1
171 226 17,400 23,100 DB DF 171.5 105.5 140 190 2 1
122 180 12,500 18,300 DB DF 120.5 72.5 142 193 2 1
320 395 32,500 40,500 DB DF 184 104 144 216 2.5 1
288 360 29,400 36,500 DB DF 231 151 144 216 2.5 1
445 585 45,500 59,500 DB DF 234 118 148 262 3 1.5
405 535 41,500 54,500 DB DF 288 172 148 262 3 1.5
69.5 111 7,100 11,300 DB DF 109 73 147 168 1 0.6
123 180 12,500 18,300 DB DF 143 95 148.5 181.5 1.5 1
194 265 19,800 27,000 DB DF 167 101 150 200 2 1
174 237 17,700 24,200 DB DF 180 114 150 200 2 1
330 430 33,500 44,000 DB DF 197 113 154 236 2.5 1
297 390 30,500 40,000 DB DF 248 164 154 236 2.5 1
490 670 50,000 68,500 DB DF 251 127 158 282 3 1.5
445 615 45,500 63,000 DB DF 308 184 158 282 3 1.5
241 315 24,500 32,000 DB DF 143.5 67.5 157 208 2 1.5
88.5 141 9,000 14,400 DB DF 118 78 157 183 1 0.6
158 234 16,100 23,900 DB DF 160 104 160 200 2 1
222 305 22,700 31,500 DB DF 178 108 162 213 2 1
199 275 20,300 28,100 DB DF 192.5 122.5 162 213 2 1
375 515 38,500 53,000 DB DF 211 121 164 256 2.5 1
340 470 34,500 48,000 DB DF 267 177 164 256 2.5 1
535 765 54,500 78,000 DB DF 265 135 168 302 3 1.5
490 700 50,000 71,500 DB DF 327 197 168 302 3 1.5
90.5 148 9,200 15,100 DB DF 124 84 167 193 1 0.6
123 186 12,500 18,900 DB 182.5 132.5 172 203 2 1
160 241 16,300 24,600 DB DF 166 110 170 210 2 1
180 256 18,300 26,100 DB DF 196.5 130.5 172 217.5 2 1
180 256 18,300 26,100 DF 196.5 130.5 172 217.5 2 1
201 293 20,500 29,900 DB DF 145.5 79.5 172 218 2 1
252 355 25,700 36,000 DB DF 192 116 172 228 2 1
225 315 23000 32,500 DB DF 206 130 172 228 2 1
425 615 43,500 62,500 DB DF 226 130 174 276 2.5 1
385 555 39,500 57,000 DB DF 284 188 174 276 2.5 1
565 845 57,500 86,000 DB DF 280 144 178 322 3 1.5
B-21