b'TAKE MONSTER CUTS steel, tungsten-base alloys or ce- E = (31 to 33)10 4N/mm 2(metricWHILE CLAMPING mented carbide. The most fre- units of measure). ON ONLY 3.5 MM!quently used boring bar material isBoring bars made of tungsten alloy steel. Some boring bar manu- heavy alloys will deflect less than facturers use AISI 1144 free-machin- steel boring bars of the same diam-ing medium-carbon steel. Regard- eter and overhang by 50% to 60% less of their grades, all carbon andwhen cutting at the same DOC and alloy steels have the same modulusfeed rate.of elasticity: Cemented carbides for boring Customary U.S. units of measure:bars: E = (84 to 89)10 6psi (cus-E = 3010 6psi (4) tomary U.S. units of measure) and Metric units of measure: E = 20.6E = (52 to 61)10 4N/mm 2(metric10 4N/mm 2(5) units of measure). No dovetail preparation.A common mistake is to assume that a steel shank with a higherPatented pull-down effect hardness or a steel shank madefor maximum gripping.from higher-quality steel will deflectabout the authorRemove more material less. As can be seen from equationEdmund Isakov,& create less waste.(1), the material property that de- Ph.D., is a con-termines deflection is the modulussultant, writer of elasticity. Hardness does not ap- and CTE contrib-pear in this equation. utor. For more Tungsten heavy alloys for boringinformation, call bars: E = (45 to 48)10 6psi (cus- 561-369-4063 or email edmundisakov9701@ IT WONT LET GO.tomary U.S. units of measure) andcomcast.net.G RIP TGBRINGING JOBS BACK TO THE USAMADE IN Using high-density CHINA workholding with FOR KURT 6 VISES RETROFIT JAWS a Quick ChangeAVAILABLE NOW!System, you can:Run longer, unattended cyclesRun more jobs through your machines weeklyIncrease capacity and profitsIncrease tool engagement % and reduce tool change %Example: 8 tools/500 parts Request a 20 part fixture vs 2 partsTool changes 200 vs 2,000 550+ pageOpen/close doors 25 vs 250! catalog online!WORKHOLDING SPECIALISTSMiteeBite .com www.\x1fxtureworks.net800-543-3580 888.794.8687ctemag.com/cteguide.com71Boring.indd 71 6/17/19 10:14 AM'