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Suggested RPM speeds for Conical End Mills and Tapered End mills


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  Surface   Feet    Per   Minute
Diameter
20
30 40 50 60 70 80 90 100 125 150 200 300 400 500 600 800 1000
1/16 1122 1833 2445 3056 3667 4278 4889 5500 6112 7639 9167              
1/8 611 917 1222 1528 1833 2139 2445 2750 3056 3820 4584 6112 9167          
3/16 407 611 815 1019 1222 1426 1630 1833 2037 2546 3056 4074 6112 8149        
1/4 306 458 611 764 917 1070 1222 1375 1528 1910 2292 3056 4584 6112 7639 9167    
5/16 244 367 489 611 733 856 978 1100 1222 1528 1833 2445 3667 4889 6112 7334 9778  
3/8 204 306 407 509 611 713 815 917 1019 1273 1528 2037 3056 4074 5093 6112 8149  
7/16 175 260 347 435 520 615 700 780 875 1094 1315 1745 2620 3490 4368 5240 6990 8735
1/2 155 230 308 384 460 537 614 691 766 958 1148 1530 2290 3054 3821 4585 6113 7640
5/8 123 185 246 305 369 430 490 555 615 766 920 1228 1838 2450 3060 3669 4890 6120
3/4 102 155 206 257 308 259 409 460 511 639 766 1021 1530 2040 2350 3060 4080 5098
7/8 87 131 176 220 264 308 350 395 440 550 658 878 1312 1748 2185 2620 3494 4368
1" 77 116 154 194 230 269 308 346 384 479 576 766 1148 1530 1911 2295 3058 3820
1-1/8 68 102 138 174 206 239 274 308 341 424 508 678 1020 1360 1699 2038 2718 3398
1-1/4 61 93 123 156 185 216 245 280 307 383 460 612 917 1222 1530 1835 2450 3058
1-3/8 56 83 113 141 169 198 224 254 280 349 420 559 835 1112 1390 1669 2223 2780
1-1/2 52 77 104 129 154 180 206 230 256 319 383 510 765 1020 1273 1528 2038 2548
1-5/8 49 72 96 120 143 167 190 213 236 298 354 475 706 942 1178 1412 1882 2352
1-3/4 44 66 87 110 132 154 178 198 220 275 329 439 658 876 1092 1315 1249 2186
1-7/8 41 61 83 103 121 144 161 189 204 256 307 408 612 818 1020 1223 1631 2038
2" 38 59 77 98 118 136 155 173 194 241 289 384 576 765 958 1448 1530 1911
2-1/2 31 47 62 77 94 107 123 138 154 190 230 307 456 612 766 918 1224 1530
  Revolutions     Per     Minute


1:) SFM + FPT ( For Material )
2. ) Find RPM at intersection of SFM + Diameter
3. ) Calculate Feed IPM = FPT x Number of Flutes X RPM


WARNING:
All cutting tools can shatter and break during use.  Government regulations require that saftey glasses be
worn during use. We also recommend wearing a simple respiration mask.





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