NGK Metals Corporation - Technical: Machining Guidelines

Rod, Bar & Tube Machining Guidelines

Material		Turning		Drilling		End Milling (0.500" wide cut)
Alloy	Temper	Speed (SFM)	Feed (IPR)	Speed (SFM)	Feed (IPR)	Speed (SFM)	Feed (IPT)
C17200	ANN	1200 - 1500	.010 - .020	200 - 300	.002 - .010	200 - 350	.002 - .008
C17200	HARD	1000 - 1200	.008 - .016	150 - 250	.002 - .006	200 - 250	.001 - .003
C17200	AT, HT	800 - 1000	.005 - .015	100 - 200	.002 - .006	150 - 250	.001 - .002
C17300	HARD	800 - 1200	.010 - .020	150 - 250	.002 - .008	200 - 250	.001 - .003
C17500	ANN	1000 - 1200	.010 - .025	200 - 300	.002 - .010	300 - 400	.002 - .008
C17500	HARD	1000 - 1200	.008 - .020	150 - 300	.002 - .006	200 - 250	.002 - .006
C17500	AT, HT	800 - 1000	.005 - .015	100 - 300	.002 - .006	200 - 300	.002 - .006
C17510	ANN	1200 - 1500	.010 - .025	200 - 300	.002 - .010	300 - 400	.002 - .008
C17510	HARD	1000 - 1200	.010 - .020	150 - 250	.002 - .008	200 - 300	.001 - .006
C17510	AT, HT	800 - 1200	.008 - .016	100 - 300	.002 - .006	200 - 300	.001 - .004
Tapping Recommendations: Drill Sizes should be 2% - 3% larger than standard in HT, AT, and Hard Alloys. For Automatic Tapping RMP should be 10x TPI. Reccomend Taps for Pre-Heat Treated Alloys up to 38 HRc. All Feeds & Speeds are based on the use of Carbide tooling. *Actual optimum Feed & Speed will vary upon machine rigidity, horsepower, coolant, tool geometry, etc.

High Speed Steel Tools
Material		Machinability		Turning		Drilling		End Milling
Berylco® Product	Alloy	Rating*	Chip Type	Speed (SFM)	Feed (IPR)	Speed (SFM)	Feed (IPR)	Speed (SFM)	Feed (IPT)	Depth of Cut (IN)
Plus	C17510	40	II	600- 700	.010- .025	125- 500	.002- .005	400- 800	.005- .008	.060- .125

Supra Ultra	C17200	20	II	200- 300	.010- .020	100- 300	.002- .009	150- 250	.001- .003	.060- .125

		I=Free Cutting II=Short Chip		For carbide tools, increase speed 2-3 times listed value.		For hole depths more than 2 times the drill diameter, reduce speed and feed.		For carbide tools, increase speed 2-3 times listed value.