Page 49 - Iscar_Article_Brochure

Hence:

Where n is the RPM of the workpiece, rpm,
w
Ftable is the vecolicity of the cutter along the
workpiece axis (axial speed feed),
z is the number of inserts,
f is the feed per tooth in the axial direction,
z
mm/tooth, and n is the RPM of the tool, rpm.
t

2 The pitch angle

The pitch angle - θ, can be easily calculated.
If the machined workpiece diameter is:

(a is the depth of cut), then the pitch angle is:
p

3 Effective feed – f' and the velocity of
z
the cutter along the spiral direction - V f

The workpiece rotational motion increases the
feed on the cutter because it rotates towards the
cutters body. V is defined as the cutter velocity
f
along the spiral direction. During a single rotation
of the workpiece, the cutter translates

Therefore, the velocity of the cutter in the spiral
direction (effective speed feed) is:

V can also be written as:
f

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