SPEEDS & FEEDS

The following tables are starting parameters only. Every application is different and may require varying feeds and speeds from this chart.

As the degree of taper increases, you may have to use the large diameter provided to calculate the appropriate RPM, instead of tip size. This usually isn’t necessary until seven degrees. At that time, the tip size would be used to calculate the needed feed per tooth. Tapered end mill usage can be tricky if the proper settings are not adhered to. Please follow these endmill usage charts as closely as possible.

TAPERED END MILLS – HIGH SPEED STEEL – FEED PER TOOTH (ROUGHING AND FINISHING)
MaterialSFM3/32 to 1/85/32 to 3/167/32 to 1/45/16 to 3/87/16 to 1/29/16 to 5/811/16 to 3/47/8 to 1″
Aluminum 60616000.00050.0010.00130.0020.00350.0040.00650.008
Stainless Steel 304, 302900.00030.00040.00050.0010.000130.0030.00350.004
Cast Iron – Ductile, Grey1000.00030.00040.00070.00130.00250.0030.0040.005
Bronze, Brass, Copper1250.00030.00050.00080.0010.00250.0030.00420.005
Tool Steel A2, D2, H13800.00020.00030.00040.00060.00150.0020.00250.003
Steel 4140, 1020, 4340800.00040.00050.00060.0010.0020.0030.0040.005
Titanium 6A1-6V-25N. 6A1-4V600.00020.00040.00050.00070.0010.00230.00250.003
Nickel Base Alloys, Inconel
718, Hastalloy, Waspalloy
200.00020.00040.00050.00070.0010.00150.0020.003
TAPERED END MILLS – MICROGRAIN CARBIDE – FEED PER TOOTH (ROUGHING AND FINISHING)
MaterialSFM3/32 to 1/85/32 to 3/167/32 to 1/45/16 to 3/87/16 to 1/29/16 to 5/811/16 to 3/47/8 to 1″
Aluminum T6
2014 T6/T651
6000.00050.0010.00130.0020.00350.0040.00650.008
Copper, Brass900.00030.00040.00050.0010.000130.0030.00350.004
Copper Alloy, Bronze1000.00030.00040.00070.00130.00250.0030.0040.005
Magnesium Diecast1250.00030.00050.00080.0010.00250.0030.00420.005
Graphite800.00020.00030.00040.00060.00150.0020.00250.003
High Strength 4140,
4340,52100,H11,H13
800.00040.00050.00060.0010.0020.0030.0040.005
Mold Steels
P20, 01 ,06
600.00020.00040.00050.00070.0010.00230.00250.003
Alloy Steel,
200,300,11xx,13xx
200.00020.00040.00050.00070.0010.00150.0020.003
Titanium Alloy
6AL-4V, 6AL-25N-ASTM
2000.00020.00030.00040.00090.00120.0020.0030.0035
Stainless Steel 200 Series,
304-L, 316L, 303, 15115
2250.00020.00030.00040.00080.0010.0020.0030.004
Ductile Grey Cast Iron2500.00050.00070.00150.0020.0030.0040.0050.006
Plastics and Acrylics4000.0010.00150.00250.0040.0050.0080.010.011
Nickel Base
Haspaloy, Waspaloy
Inconnel, Monel, K-monel,
750.00040.00050.00070.00090.00150.0020.00250.003
SFM & FPT
R.P.M.= 3.82 X SFM divided by Diameter
IPM = CL (chipload) X Number of Flutes X R.P.M.
SURFACE FEET PER MINUTES
Diameter20304050607080901001251502003004005006008001000
1/1611221833244530563667427848895500611276399167
1/861191712221528183321392445275030563820458461129167
3/1640761181510191222142616301833203725463056407461128149
1/430645861176491710701222137515281910229230564584611276399167
5/162443674896117338569781100122215281833244536674889611273349778
3/8204306407509611713815917101912731528203730564074509361128149
7/16175260347435520615700780875109413151745262034904368524069908735
1/215523030838446053761469176695811481530229030543821458561137640
5/81231852463053694304905556157669201228183824503060366948906120
3/41021552062573082594094605116397661021153020402350306040805098
7/887131176220264308350395440550658878131217482185262034944368
1″77116154194230269308346384479576766114815301911229530583820
1-1/868102138174206239274308341424508678102013601699203827183398
1-1/4619312315618521624528030738346061291712221530183524503058
1-3/8568311314116919822425428034942055983511121390166922232780
1-1/2527710412915418020623025631938351076510201273152820382548
1-5/84972961201431671902132362983544757069421178141218822352
1-3/44466871101321541781982202753294396588761092131512492186
1-7/84161831031211441611892042563074086128181020122316312038
2″38597798118136155173194241289384576765958144815301911
2-1/2314762779410712313815419023030745661276691812241530
REVOLUTIONS PER MINUTE

1. SFM + FPT (For Material)
2. Find RPM at intersection of SFM + Diameter
3. Calculate Feed IPM = FPT x Number of Flutes X RPM

WARNING:
All cutting tools can shatter and break during use. Government regulations require that safety glasses be worn during use. We also recommend wearing a simple respiration mask.