30 —
M
achinist
c
alc™
P
ro
3. Enter the RPM:
1 0 0 0 R
RPM
$
1000.
4. Calculate the Feed Rate:
f
feeD 20.0000
INCH/MIN
f
RPM
$
1000.
f
CUT
$
0.02
INCH/ReV
*
* This Cutting Feed is calculated based on the entered Feed/Tooth and
Number of Teeth. It, along with RPM, is then used to calculate the
Feed Rate.
cuTTINg SPEED
Cutting Speed is the speed of the workpiece surface relative
to the edge of the cutting tool during a cut, typically measured
in surface feet per minute. You can calculate Cutting Speed by
entering the Diameter of the tool or material you’re using and the
RPM (Spindle Speed).
Cutting Speed –
Milling
Calculate the Cutting Speed for a mill using a .5" tool running at
1,250 RPM (Spindle Speed):
KeySTROKe
DISPLAy
O O
0.
1. Enter the Diameter of the tool:
. 5 d
DIA
$
0.5
INCH
2. Enter the RPM:
1 2 5 0 R
RPM
$
1250.
3. Calculate the Cutting Speed:
C
*
CUT 164.
feeT/MIN
C
DIA
$
0.5
INCH
KeySTROKe
DISPLAy
(cont’d)
