










Enter Data for Calculations Below


End Mill Diameter*

Number of Cutting Edges*

Radial Width of Cut*


































To complete calculations, enter known data into
the empty boxes on the left hand side below.
All mandatory fields for calculations are indicated by (*). All calculations are based on industry
formulas and are intended to provide theoretical values. Actual results could vary and SGS Tool
Company assumes no responsibility. 







Surface Meters per Minute

Solution


Revolutions per
Minute*

Constant

End Mill Diameter

Surface
Meters per Minute





0.00314




SMM











Revolutions per Minute

Solution


Surface Meters per
Minute

Constant

End Mill
Diameter

Revolutions per Minute





318.057




RPM











Millimeters per Minute

Solution


Millimeters per
Tooth (Chipload)

Revolutions per Minute

Cutting Edges

Millimeters
per Minute











mmPM











Millimeters per Tooth (Chipload)

Solution


Millimeters per
Minute*

Revolutions per Minute

Cutting Edges

Millimeters
per Tooth (Chipload)











mmPT











Millimeters per Revolution

Solution


Millimeters per
Minute

Revolutions per Minute


Millimeters
per Revolution









mmPR








Millimeters per Tooth (Chipload) to Obtain Theoretical
Surface Finish

Solution


Desired Surface
Finish Ra (micrometers)

End Mill
Diameter

Millimeters per Tooth (Chipload)









mmPT


The actual finish is usually rougher than
theoretical calculation.
Other factors
not calculated help to ultimatley determine finish.

Approximated Parameter






Radial Chip Thinning Feed Calculator

Solution





Whenever the radial width is less than half the tool diameter
(as in Rw2) the chip thickness is less than the feed per tooth and additional
feed is possible using the chip thinning calculation.


Millimeters
per Tooth with Thinning







mmPT





This new Inches per Tooth has
been optimized for the Depth of Cut









Optimized
Millimeters per Minute







mmPM





This is the new Feddrate using
the optimized Inches per Tooth above








Programmed Feedrate for Interpolating a Bore

Solution





When moving in a circular motion,
the actual feed rate at the outside diameter differes from the programmed
feed rate. Use the feed rate below
when boring out a large bore, the centerline feed rate is calculated and
inserted into program to compensate for the motion.




































Diameter of Bore

mmPM at Diameter

End Mill Diameter

Millimeters
per Minute at Centerline




mm






mmPM














Programmed Feedrate for Interpolating a Boss

Solution





When moving in a circular motion,
the actual feed rate at the outside diameter differes from the programmed
feed rate. Use the feed rate below
when boring out a large bore, the centerline feed rate is calculated and
inserted into program to compensate for the motion.




































Diameter of Boss

mmPM at Diameter

End Mill Diameter

Millimeters per Minute at Centerline




mm






mmPM












