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Recommended Cutting SpeedsSpeeds andFeeds forDapra ToroidCuttersTOUGHESTShock ResistanceMEDIUMShock & WearMEDIUMShock & WearHARDESTWear ResistanceLOWER TEMPSHIGHER TEMPSLOWER TEMPSHIGHER TEMPSLOWER TEMPSHIGHER TEMPSLOWER TEMPSHIGHER TEMPSDMK30DMK303DMK30-HPDMK307DMK30-GLHDMK25DMK253DMK25-HPDMK257DMK25-GLHDMP25DMP253DMP25-HPDMP257DMP25-GLHDMK15DMK153DMK15-HPDMK157DMK15-GLH1018,12L14,1041, 1045LOW-TO-MEDIUMCARBONSTEELS225-340300-525375-600450-675525-750340-600375-640450-750525-900600-1200340-600375-640450-750525-900600-1200450-750525-900600-12004140, 41504340, H13,P20, A2, D2TOOL STEELS,HIGH-ALLOYSTEELS(SOFT)190-300225-450300-525375-600375-675280-525300-600375-675450-750450-900280-525300-600375-675450-750450-900375-675450-750450-9004140, 41504340, H13,P20, A2, D2TOOL STEELS,HIGH-ALLOYSTEELS(HARDENED)145-280145-395145-280145-395145-395170-450303, 304LOW 400SERIESFREEMACHININGSTAINLESS115-225225-450375-600450-675450-825190-300300-525375-675450-800450-900190-300300-525375-675450-800450-900190-300300-525375-675450-800450-900316, 347, PHSTAINLESSTOUGHERSTAINLESSGRAY,MALLEABLE,DUCTILECASTIRONS6061,7075ALUMINUMALLOYSAMPCO,WEARITECOPPERALLOYSINCONEL,WASPALOY,MONELHIGH-TEMP.ALLOYS/TITANIUMPLASTICS,NON-FERROUS1 st CHOICE GEOMETRY N/D N/T T D/N D/N T/N D (Ground) D/N D/N D (Ground)RECOMMENDED IPT .006-.015 .006-.012 .003-.008 .004-.012 .003-.010 .006-.015 .005-.030 .005-.020 .003-.007 .005-.03095-190115-300190-375225-450225-600105-210125-330205-415250-495250-66095-190FINISHING115-300FINISHING190-375FINISHING225-450FINISHING225-600FINISHING300-450500-800600-900600-1200350-550500-765500-935500-1100350-550DUCTILE500-765DUCTILE500-935DUCTILE500-1100DUCTILE350-600GRAY600-765GRAY700-935GRAY800-1100GRAY1000+1000+1000+1000+200-600400-1200200-600400-1200200-600400-800400-900400-120050-150ROUGHING50-150ROUGHING50-200ROUGHING50-250ROUGHING55-16555-16560-20060-25050-150FINISHING50-200FINISHING50-250FINISHING50-150FINISHING50-250FINISHING50-250FINISHING75-250FINISHING75-350FINISHING1000+1000+1000+1000+1000+1000+1000+1000+1000+1000+1000+1000+1000+1000+1000+** Best choice for material shown in bold textThe parameters provided are suggested operating parameters. Actual speeds and feeds will depend on manyvariables, such as rigidity, workpiece hardness, tool extension, machine accuracy, Depth of Cut, etc. Start at themiddle of the SFM range and the low end of the FPT range. Next, increase FPT to optimize productivity and tool life.Higher SFM will provide higher output but may reduce tool life. Try different combinations to find the parameters thatbest suit your needs.• The -3 and -HP coatings are best suited for low to medium operating speeds (temperatures) and softer materials.• The -7 and GLH coatings are best suited for high operating speeds (temperatures) and harder materials.† DMK25 substrate is available for RHINO-CARB D and N geometries only.Dapra Toroidproducts aremade in the USA.Bringing Better Ideas to the Cutting Edge 66 Granby Street, Bloomfield, CT 06002800-243-3344 • 860-242-8539 • Fax 860-242-3017Email info@dapra.com • www.dapra.com© Copyright 2012 Dapra Corporation 04-12-5M