34 —
M
achinist
c
alc™
P
ro
feed per Tooth –
based on Feed rate, rpM and # of Teeth
Calculate Feed per Tooth (Chip Load) with a 12.8 Inch per
minute Feed Rate, 4 Teeth and a Spindle Speed of 800 RPM:
KeySTROKe
DISPLAy
O O
0.
1. Enter the Feed Rate:
1 2 . 8 f
feeD
$
12.8
INCH/MIN
2. Enter the Number of Teeth:
4 #
TeeTH
$
4.
3. Enter the Spindle Speed (RPM):
8 0 0 R
RPM
$
800.
4. Calculate the Feed per Tooth:
F
*
fPT 0.0040
INCH
* Repeated presses of
F
will toggle through the inputs and outputs,
starting with the entered Number of Teeth.
raDIal cHIP THINNINg
In a Milling operation when the depth of a cut is less than half
the diameter of the tool, you can use the Radial Chip Thinning
to determine a new, faster and more efficient Chipload or Feed/
Tooth value.
Radial Chip Thinning –
based on Feed per Tooth, Tool Diameter and cut Depth
Calculate Radial Chip Thinning value with a Feed Per Tooth of
0.006 Inch, a 1" Tool Diameter and a Cut Depth of 0.1 Inch.
KeySTROKe
DISPLAy
O O
0.
1. Enter the Feed per Tooth: