Basics of Endmilling

Parts of an Endmill

Body Neck Shank

Cutter sweep Neck diameter Diameter Shank diameter

Neck length

Length of cut Shank length Center hole

Overall length

Land width Relief width Radial relief Margin width Radial primary relief angle Margin Radial secondary relief angle

Center cut Rake angle Rake face Helix angle land width Corner

Flute Heel Radial cutting edge

Land End cutting edge End gash Rounded flute

bottom Center hole Web thickness Axial primary relief angle Flute depth Chip pocket Axial secondary relief angle Ball radius Concavity angle of end cutting edge

Calculating Cutting

ConditionsCutting speedSide millingvc :Cutting speed (m/min)
l
π ≈3,14
π . D . n1.000 . v
v =n =cD :Endmill diameter (mm)
c1.000π . D
n :Rotational speed (min -1)
vf :Feed speed (mm/min)
l Feed ratef :Feed rate per revolution (mm/rev)
r
ft :Feed rate per tooth (mm/tooth)
v = fndoc
f5z :Number of teeth
vD
v = f5 z 5 nf =f
fttznW

5 oc Slotting l Depth of cut (D.O.C) d : Axial D.O.C. (depth)

oc

w : Radial D.O.C. (width)

oc

R

(Ball Endmill)dd
l Notch width (D )ococ
1
D1= 2 5 2 5R 5d—d2DD
ococP1

f øD l Cutting speed and feedrate are calculated using R the same formula as square endmill.

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Technical Guidance 1