Calculated Industries 4087 User Manual - 34 — M

34 — M

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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: