b'Catching 22 for their titanium applications. achieve the same metal removal rate with less thrust. Cutting tita-A Changing Strategy nium with a machine tool that pro-Vanderbeck pointed out its es- As cutting tool manufacturers de- vides high torque and high-force sential to maintain coolant at thesign cutters that have significantlyaxial feed capability is the strategy.correct concentration, which is a bitmore positive rake angles, not asHe added that toolmakers are higher for titanium applications. Imuch cutting force is required toproducing cutting edges that can strongly recommend that manufac- shear titanium compared with pasthandle more heat while evacuating turers consult their coolant supplierofferings, said Mitsui Seikis Walker.chips more efficiently, which enables for the best coolant concentrationThis change enables end users tohigher cutting speeds. In the old days, we would cut around 180 sfm. Today, they are at 340, 440, 540 sfm.Fromamachinetooldesign Drill with confidenceStars special design carbide drills feature geometries and coatings for enhanced results while machining various materials including titanium applications.standpoint, machine builders must - Engineered and manufactured to order increase the torque profile and be able to run at a higher rpm to in Helical or straight flute crease the mrr, Walker said. For - High performance geometries example, back in the day when we were building hard-metal ma Advanced coating options chines, we would have 2,000 ft.-lbs. of torque at 106 rpm. When run Reconditioning services available ning at 300 rpm, the torque curve drops significantly and the torque becomes insufficient to maintain For more information or to request a quote, give Star SU a call or visit our website: the same speeds and feeds, he added. This means the gearboxes now need to be built to accommo-www.star-su.com 248-474-8200 date 2,000 ft.-lbs. at 400 rpm in-stead of 100 rpm. The gearboxes need to have wider gears and be more robust to be able to take the 44JULY 2019 Titanium.indd 44 6/17/19 10:30 AM'