Cuttermasters CM-01P User Manual

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CUTTERMASTER Professional CM-01P User’s Manual
Page 10
Chapter Two
The Basics
2.1 End Mill Denition
Endmillsareprolesharpmillingcutters.Assuch,theyrequirecertaintreatmentwhensharpening.
These tools have a relatively small diameter in proportion to their length. Because of this long shape,
careshouldbetakenwhenholdingtoeliminatechatter,improvenishpropertiesandallowforgood
tool uniformity on the diameter. These tools also have a relatively small mass, meaning that care
should be taken by monitoring heat generated during the grinding process.
If the end mill has centers, these can be used for concentric holding. If not, the tool is generally held
byacolletattheshankendwithatoothrestsetinaspecicrelationtothewheelandtoolcenter.
This tooth/tool rest is usually placed directly at the point of contact between the wheel and the cutter,
minimizing vibration during the grinding process.
Types of Relief
End mills can be sharpened with three different types of relief on the diameter:
 • aconcave,almostatsurfaceisproducedwiththefaceofaplainwheel;
 • aatreliefsurfaceisproducedwithacupwheel.
• a radial or eccentric relief is produced by presenting the face of a plain wheel at an
  angletothecuttingaxisofahelical-utedendmillorbydressinganangleontheface
of a wheel rotating on a parallel axis.
Eccentricreliefproducesarelativelynecuttingedgefreefromminutenicksandasaresultisstron-
gerthanthoseproducedbyothermethods.Anotherbenetofthismethodofre-grindingisthata
secondary clearance is not needed. If the grinding wheel face width is maintained so that it is wider
than the relieved land (measured in an axial direction), wide primary lands are possible without dan-
geroftheheelofthelandcontactingthenishedsurfaceproducedwhentheendmilliscutting.This
is due to the fact that the clearance angle formed by the curve or angle on the wheel increases as it
progresses further from the cutting edge. Most manufacturers, however, consider it good practice to
provide a secondary clearance on end mill teeth, except on the smallest size of cutters.

Cuttermasters CM-01P Specifications

General

Brand	Cuttermasters
Model	CM-01P
Category	Grinder
Language	English