CBN GRADES EXCELLENT CUTTING PERFORMANCE IN HARDENED STEEL AND CAST IRON TB610 • Excellent oxidation resistance and chemical stability. • For continuous to light interrupted turning. • For machining hard steel, alloy steel, tool steel and case hardened steel. TB670 • High hardness and impact resistance. • For continuous to severe interrupted turning. • For alloy steel, tool steel, case hardened steel and chilled cast iron. TB730 • High hardness and high fracture toughness. • General turning and milling. • For gray cast iron, nodular cast iron and carbide rolls. RECOMMEDED CUTTING CONDITIONS Materials TB610 TB670 TB730 Gray Cast Iron V (sfm) 1640 - 3280 (HB 180-230) f (ipr) .004 - .012 Chilled Cast Iron V (sfm) 260 - 490 260 - 490 (> HB 400) f (ipr) .004 - .008 .004 - .012 Hardened Steel V (sfm) 490 - 1150 330 - 980 (HRc 40-65) f (ipr) .002 - .008 .004 - .012 Sintered Metal V (sfm) 330 - 980 330 - 820 (Hv 200-600) f (ipr) .002 - .008 .004 - .010 V (sfm) 650 - 1640 DCI or HSS Roll f (ipr) .002 - .008 Super Alloy V (sfm) 330 - 980 (Ni-base) f (ipr) .002 - .008 112