Seat Size Seat Size GROOVING / CUTTING OFF RECOMMENDED CUTTING CONDITIONS y CUTTING SPEED Work Material Properties Grade Cutting Speed vc (SFM) 165 330 490 655 820 985 P VP20RT 330 785 Mild Steel < 160HB VP10RT 360 820 VP20RT 260 655 VP10RT 295 690 160 ─ 280HB VP30RT 195 590 Carbon Steel MY5015 360 820 Alloy Steel VP20RT 195 525 VP10RT 230 560 > 280HB VP30RT 130 460 MY5015 295 690 M VP20RT 195 590 Stainless Steel < 270HB VP10RT 230 620 VP30RT 130 525 K VP20RT 260 655Gray Cast IronTensile Strength< 300MPaVP10RT295690F MY5015 460 985 VP20RT 195 525 Ductile Cast Iron Tensile Strength< 800MPaVP10RT 230 560 MY5015 295 690 S Heat Resistant AlloyTitanium Alloy VP20RT 100 195─VP10RT130 230 Note 1) VP20RT is the first recommended grade for materials. Note 2) For VP10RT, VP20RT, VP30RT and MY5015, wet cutting is recommended. y FEED PER REVOLUTION GM Breaker GS Breaker H H G G F F D D 0 .004 .008 .012 .016 0 .004 .008 .012 .016 Feed per Revolution f (IPR) Feed per Revolution f (IPR) Feed per Revolution f (IPR) Chip Breaker Seat Size D Seat Size F Seat Size G Seat Size H GM Breaker .002 ─ .008 .003 ─ .010 .003 ─ .013 .004 ─ .014 GS Breaker .001 ─ .006 .002 ─ .008 .002 ─ .009 .003 ─ .010 F237