Solid Carbide Spiral CNC Router Bits / End Mills with AlTiN Coating for Steel, Stainless Steel & Non Ferrous Metal

D	B	d	Ball Bearing	Flute	Descripcion	Max RPM	L	Includes Tool #'s	Brand	Tool No.	Precio de Lista en Dolares
3mm	10mm	3mm	No	3		28,000	40mm		Amana Tool	51610	$32.45
1/8	1/4	1/8	No	2		28,000	2		Amana Tool	51461	$31.15
1/8	3/8	1/4	No	3		28,000	1-1/2		Amana Tool	51460	$51.95
1/8	3/8	1/4	No	4		28,000	1-1/2		Amana Tool	51602	$54.05
4mm	10mm	4mm	No	3		28,000	48mm		Amana Tool	51612	$37.40
3/16	3/8	3/16	No	2		28,000	2-1/2		Amana Tool	51463	$44.70
3/16	7/16	1/4	No	3		28,000	1-7/8		Amana Tool	51462	$51.95
6mm	16mm	6mm	No	3		28,000	60mm		Amana Tool	51614	$51.95
1/4	3/8	1/4	No	2		28,000	2-1/2		Amana Tool	51465	$45.75
1/4	5/8	1/4	No	3		28,000	2-3/8		Amana Tool	51464	$51.95
1/4	5/8	1/4	No	4		28,000	2-3/8		Amana Tool	51604	$54.05
3/8	1/2	3/8	No	2		28,000	3		Amana Tool	51467	$65.50
-	-	-		-	4-Pack (Save 9%)	-	-	51461, 51463, 51465, 51467	Amana Tool	AMS-154	$170.20
-	-	-		-	3-Pack (Save 9%)	-	-	51460, 51462, 51464	Amana Tool	AMS-156	$141.85

 

Working Speed and Feeds
		Feed Per Tooth (Inch Per Tooth) Diameter equals
Material Group	Speed SFM*	up to 1/4"	1/4" to 1/2"	1/2" to 3/4"	3/4" to 1"
Aluminum/Related Alloys	600-1200	.001-.002	.002-.004	.004-.006	.006-.008
Brass/Bronze	300-550	.001-.002	.002-.003	.003-.004	.004-.005
Copper/Related Alloys	500-900	.001-.002	.002-.003	.003-.005	.005-.008
Cast Iron (soft 195bhn)	200-500	.001-.002	.002-.003	.003-.005	.005-.008
Cast Iron (medium 225bhn)	125-350	.001-.002	.002-.003	.003-.004	.004-.007
Cast Iron (hard 275bhn)	80-300	.0005-.001	.001-.002	.002-.003	.003-.005
Magnesium	800-1400	.001-.003	.003-.005	.005-.007	.007-.009
Monel/Nickel Alloys	65-175	.0005-.001	.001-.002	.002-.003	.003-.004
Plastics	600-1200	.001-.003	.003-.006	.006-.010	.010-.015
Steel-Heat Treated (35-40Rc)	150-350	.0003-.0005	.0005-.001	.001-.003	.003-.005
Steel-Heat Treated (40-45Rc)	125-275	.0002-.0005	.0005-.001	.001-.002	.002-.004
Steel-Heat Treated (45Rc)	50-200	.0002-.0005	.0005-.001	.001-.002	.002-.003
Steel-Medium Carbon	175-350	.0005-.001	.001-.002	.002-.004	.004-.006
Steel, Mold & Die	50-250	.0005-.001	.001-.002	.002-.004	.004-.007
Steel, Tool	150-250	.0005-.001	.001-.002	.002-.004	.004-.006
Stainless-Soft	250-400	.0005-.001	.001-.002	.002-.004	.004-.006
Stainless-Hard	75-250	.0005-.001	.001-.002	.002-.003	.003-.005
Titanium Alloys	90-225	.0003-.0009	.0009-.002	.002-.003	.003-.005
* Surface Feet/Minute SFM = 0.262 x Dia. x RPM

General Endmill Calculations

In order to find the...

RPM (Revolutions Per Minute)
The speed by which the tool or spindle is rotating

SFM (Surface Per Minute)
The manufacturer's suggested working velocity of the tool based on geometry, substrate, coatings and workpiece material

IPM (Inches Per Minute)
The feedrate by which the workpiece material passes by the endmill during production

IPT (Inches Per Tooth)
the manufacturer's suggested feedrate, measured in .001" increments, as applied to each tooth of the endmill, aka "chip load"

Feed Rate
The distance traveled by the workpiece as the tool revolves one time only

If you know these...	Then the math becomes easy...
Suggested Surface Feet Per Minute (SFM) (see above for material suggestions) Diameter of Tool	RPM = SFM X 3.82, ÷ Diameter of tool
Revolutions Per Minute (RPM) Diameter of Tool	SFM = .262 X RPM X Diameter of tool
RPM Chipload Per Tooth (feed per tooth per revolution) Number of teeth	IPM = RPM X chipload per tooth X Number of flutes
IPM (inches per minute) RPM (revolutions per minute) Number of Flutes on tool	IPT = IPM ÷ RPM ÷ Number of flutes
IPM (inches per minute) RPM (revolutions per minute)	IPR = IPM ÷ RPM

 
A working example to calculate RPMs…

Whereby you want to run a 3/8" diameter, 4 fluted endmill at the suggested 200 SFM. What are your suggested RPMs?

RPMs = SFM X 3.82, ÷ Diameter of tool
So… 200 SFM X 3.82, ÷ .375"… equals 2,037 RPM 


A working example to calculate the SFM… for the same 3/8" diameter tool when you know that your spindle runs at 18,000 RPMs…

SFM = .262 X RPM X Diameter of tool 
So… .262 X 18,000 X .375"… equals 1,768.5 SFM


A working example to find the work material's suggested feed-rate, for the same 3/8" diameter, 4 fluted tool, when I know the spindle is running at 2,500 RPM and a chip load of .0025" per tooth… 

IPM = RPM X Chip Load per Tooth X Number of Teeth
So….2,500 X .0025" X 4… equals 25 IPM (inches per minute) 


A working example to see if your chip-load is correct, for a 3/8" diameter, 2 fluted tool routing aluminum at 5,000 RPMs at 45 IPM feed…

IPT = IPM ÷ RPM ÷ Number of flutes
So…. 45 ÷ 5,000 ÷ 2 flutes…equals .0045" per tooth