
| ROCKWELL | ROCKWELL | BRINELL | VICKERS | TENSILE | PSI | |
| HARDNESS | HARDNESS | HARDNESS | HARDNESS | STRENGTH | (1000lb/in2) | |
| (HRb) | (HRc) | (HB) | (HV) | (N/mm2) | ||
| Solid Carbide Tools | 67 | – | 121 | 122 | 401 | 58 |
| 70 | – | 126 | 127 | 432 | 63 | |
| 73 | – | 132 | 132 | 448 | 65 | |
| 75 | – | 136 | 137 | 455 | 66 | |
| 77 | – | 140 | 143 | 463 | 67 | |
| KYOCERA SGS Precision Tools (KSPT) is an ISO 9001:2015 Certified manufacturer of industry leading round solid | 80 | – | 147 | 150 | 479 | 69 |
| carbide cutting tools. State of the art manufacturing and warehouse facilities have the capacity and processes | 82 | – | 153 | 156 | 494 | 72 |
| 84 | – | 159 | 163 | 525 | 76 | |
| to meet the quality and delivery demands of customers in all markets around the world. Complete inspections | 86 | – | 165 | 171 | 540 | 78 |
| performed within its metallurgical lab and manufacturing quality departments ensure the use of high quality | 89 | – | 177 | 178 | 556 | 81 |
| 91 | – | 186 | 188 | 602 | 88 | |
| carbide and reliable manufacturing consistency regardless of when a cutting tool is produced. | 93 | – | 197 | 196 | 632 | 92 |
| 96 | – | 216 | 212 | 664 | 97 | |
| 97 | – | 223 | 218 | 695 | 101 | |
| KSPT is proud to have pioneered some of the world’s most advanced cutting technologies due to rigorous testing | 98 | 21 | 230 | 234 | 756 | 110 |
| – | 22 | 236 | 241 | 772 | 112 | |
| of tools, coatings, and materials within its Global Innovation Center. It is this commitment to innovation that has | ||||||
| – | 23 | 242 | 247 | 787 | 114 | |
| launched patented products and technologies like the Z-Carb with its variable geometry and cutting edge prepara- | – | 24 | 248 | 255 | 818 | 118 |
| – | 25 | 254 | 261 | 849 | 123 | |
| tion, Series 43 APR® and APF® ultra high performance aluminum cutting tools, and the JetStream coolant technology. | ||||||
| – | 27 | 266 | 269 | 865 | 125 | |
| – | 28 | 272 | 275 | 895 | 130 | |
| – | 29 | 278 | 284 | 911 | 132 | |
| SGS has become an important part of the KYOCERA Precision Tools family, and while the name has changed, one | ||||||
| – | 30 | 284 | 292 | 942 | 136 | |
| thing has not. Its dedicated people and their relentless commitment to the customer. KSPT Technical Sales Engi- | – | 31 | 293 | 300 | 973 | 141 |
| – | 32 | 302 | 308 | 988 | 143 | |
| neers, Application Specialists, and Distribution Partners blanket the globe, delivering reliable service and support | ||||||
| – | 33 | 310 | 318 | 1019 | 147 | |
| to all market segments. It is these people and products that drive innovative application strategies and cutting tool | – | 34 | 319 | 327 | 1050 | 152 |
| – | 35 | 328 | 337 | 1096 | 159 | |
| technologies into the end user, continually exceeding expectations and providing the most Value at the Spindle®. | – | 37 | 345 | 349 | 1127 | 163 |
| – | 38 | 353 | 359 | 1158 | 168 | |
| – | 39 | 362 | 370 | 1189 | 172 | |
| – | 40 | 370 | 381 | 1235 | 179 | |
| – | 41 | 381 | 395 | 1266 | 183 | |
| – | 42 | 391 | 408 | 1312 | 190 | |
| – | 44 | 411 | 422 | 1359 | 197 | |
| – | 45 | 422 | 437 | 1420 | 206 | |
| – | 46 | 433 | 452 | 1467 | 212 | |
| – | 48 | 455 | 470 | 1513 | 219 | |
| – | 50 | 479 | 497 | 1559 | 226 | |
| – | 51 | 485 | 517 | 1621 | 235 | |
| – | 52 | 497 | 532 | 1668 | 241 | |
| – | 54 | – | 573 | 1729 | 250 | |
| – | 56 | – | 609 | 1807 | 262 | |
| – | 57 | – | 630 | 1884 | 273 | |
| – | 59 | – | 670 | 1961 | 284 | |
| – | 60 | – | 698 | 2039 | 295 | |
| – | 61 | – | 725 | – | – | |
| – | 62 | – | 740 | – | – | |
| – | 63 | – | 780 | – | – | |
| – | 64 | – | 812 | – | – | |
| – | 65 | – | 847 | – | – | |
| – | 66 | – | 885 | – | – | |
| – | 67 | – | 926 | – | – | |
| – | 68 | – | 971 | – | – |
Conversions from each scale are approximate