Hardness Conversion Chart ROCKWELL ROCKWELL BRINELL VICKERS TENSILE PSI HARDNESS HARDNESS HARDNESS HARDNESS STRENGTH (1000lb/in2) (HRb) (HRc) (HB) (HV) (N/mm2) 67 – 121 122 401 58 Solid Carbide Tools 70 – 126 127 432 63 73 – 132 132 448 65 75 – 136 137 455 66 77 – 140 143 463 67 80 – 147 150 479 69 82 – 153 156 494 72 84 – 159 163 525 76 KYOCERA SGS Precision Tools (KSPT) is an ISO-certified manufacturer of industry leading round solid carbide 86 – 165 171 540 78 89 – 177 178 556 81 2018 Global Product Catalog cutting tools. State of the art manufacturing and warehouse facilities have the capacity and processes to meet the quality and delivery demands of customers in all markets around the world. Complete inspections performed 91 93 – – 186 197 188 196 602 632 88 92 within its metallurgical lab and manufacturing quality departments ensure the use of high quality carbide and 96 – 216 212 664 97 97 – 223 218 695 101 reliable manufacturing consistency regardless of when a cutting tool is produced. 98 21 230 234 756 110 – 22 236 241 772 112 – 23 242 247 787 114 KSPT is proud to have pioneered some of the world’s most advanced cutting technologies due to rigorous testing – 24 248 255 818 118 – 25 254 261 849 123 of tools, coatings, and materials within its Global Innovation Center. It is this commitment to innovation that has – 27 266 269 865 125 launched patented products and technologies like the Z-Carb with its variable geometry and cutting edge prepara- – 28 272 275 895 130 – 29 278 284 911 132 tion, Series 43 APR® and APF® ultra high performance aluminum cutting tools, and the JetStream coolant technology. – 30 284 292 942 136 – 31 293 300 973 141 – 32 302 308 988 143 SGS has become an important part of the KYOCERA Precision Tools family, and while the name has changed, one – 33 310 318 1019 147 thing has not. Its dedicated people and their relentless commitment to the customer. KSPT Technical Sales Engi- – 34 319 327 1050 152 – 35 328 337 1096 159 neers, Application Specialists, and Distribution Partners blanket the globe, delivering reliable service and support – 37 345 349 1127 163 to all market segments. It is these people and products that drive innovative application strategies and cutting tool – 38 353 359 1158 168 – 39 362 370 1189 172 technologies into the end user, continually exceeding expectations and providing the most Value at the Spindle®. – 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 www.kyocera-sgstool.com www.kyocera-sgstool.com 379