Selecting the Correct Cutting Values

1. fz depends on the Ap1 and ae values

With round inserts, two factors can affect the hm: Ap1 and ae. fz has to be adjusted accordingly.

Recommended Starting Feed Rate Values (fz) Related to the Ap1 and ae Values:

ae engagement10%20%30%40%50%100%
Ap1 = 1mm1,52mm1,07mm0,88mm0,76mm0,68mm0,48mm
Ap1 = 2mm1,07mm0,76mm0,62mm0,54mm0,48mm0,34mm
Ap1 = 3mm0,88mm0,62mm0,51mm0,44mm0,39mm0,28mm
Ap1 = 4mm0,76mm0,54mm0,44mm0,38mm0,34mm0,24mm
Ap1 = 5mm0,62mm0,44mm0,36mm0,31mm0,26mm0,20mm
Ap1 = 6mm0,54mm0,38mm0,31mm0,27mm0,24mm0,17mm

Example application highlighted.

Example Cutting Conditions for iC16mm... Insert in Pocketing, up to 3 L/D approximately:

TN2505feed per tooTN6525 th fz (mm)/ae>50%TN6540
insert = RDPX1604M0SNminmedmaxminmedmaxminmedmax
Edge Geometry MMae>50%Recommended starting Ap1 = 3mm0,28mm0,45mm0,65mm0,28mm0,50mm0,70mm
Edge Geometry MHae>50%Recommended starting Ap1 = 3mm0,28mm0,35mm0,50mm0,28mm0,50mm0,75mm0,28mm0,60mm0,80mm

2. Ap1 and vc corrections depend on L/D ratio

With increasing L/D ratios, or overhang, vibrations can occur due to reduced rigidity. To ensure successful application, it is recommended to adjust Ap1 and vc values according to the following table:

% of Ap1 max % of vc

L/D ratio to reduce to reduce

L

L

D

L/D ratio% of Ap1 max to reduce% of vc to reduce
0%0%
265–75%10–15%
>480–95%20–40%

L

D

Recommended Cutting Conditions • Helical Interpolation from Solid D

min holemax hole diameterAp1 max per max ramp Ap1 max
cutter diameterdiameter(fl at bottom)revolutionanglewhen plungingCutter
Diameter

32 36mm 48mm 3mm 20° 3mm

cutter diametermin hole diametermax hole diameter (fl at bottom)Ap1 max per revolutionmax ramp angleAp1 max whenplunging
3236mm48mm3mm20°3mm
5069mm84mm8mm9,5°4,8mm
5273mm88mm8mm8,2°5mm
6395mm110mm8mm5,5°4,7mm
66101mm120mm8mm4,2mm
80129mm144mm8mm4,1mm
100169mm184mm8mm2,4°4,6mm
125219mm234mm8mm2,2°4,4mm

Hole