Page 230 - MILLING CATALOG p319-550

MILLING INSERTS USER GUIDE

GRADES for APPLICATIONS and MATERIALS

ISO P ISO M ISO K ISO N ISO S ISO H
14 15 - 20 21 - 28 31 - 37 38 - 41
1 - 11 12 - 13 Hard Steel
Stainless Steel Cast Iron & Hardened
Material groups Stainless Austenitic & Duplex High Temp. Cast Iron
Steel Ferritic (Ferritic-Austenitic) IS8 Alloys
Steel & Martensitic Nonferrous IB55
IC808 (908) IC5100 IB85
Harder IC5400 IC808 (908) (4100) ID5 IC808 (908)
IC840 DT7150 IC840 IC30N
IC30N IC810
IC830 (928) (910) IC808 (908)
IC808 IC5500 IC380
(908) IC330 (328) N DT7150
IC882
IC810 Y IC04 IC5820** N
(910)*
MILLING IC830 (928) IC08 IC882
Indexable IC830
(928) IC28 IC330 (328)
Y Y
IC845 IC330 (328)

Coolant Tougher N N

First choice

* for steel castings
** for milling with high pressure coolant (HPC) supply

Milling Calculations

N fz Vc [m/min] Cutting speed

D [mm] Tool diameter

κ Nn N [rev/min] Spindle speed
ap
Vf fz b Vf [mm/min] Feed speed
D hm
Vf fz [mm/tooth] Feed per tooth
Calculations
Vc = π ∙D∙N [m/min] Z Number of teeth
Cutting 4 1000min fN [mm/rev] Feed per revolution
Q [cm3/ min] Metal removal rate
Spindle speed N = Vc ∙ 1000 [rev/min] ap [mm] Depth of cut
Feed speed π∙D b [mm] Width of cut
Feed per tooth Th [min] Machining time
Feed per revolution Vf = fz ∙ Z ∙ N [mm/min] Lw [mm] Machining length
Metal removal rate Kc [N/mm2] Specific cutting force
fz = Vn [mm/tooth] Kc1(1) [N/mm2] Specific cutting force for 1 mm2 chip section
N∙Z hm [mm] Average chip thickness
mc(1) Chip thickness factor
fN = fz ∙ Z [mm/rev] k [degrees] Cutting edge angle
P [kW] Machining power
Q = ap ∙ b ∙ Vf [cm3/min] h Machine efficiency
1000 P= Pc + Pm
P- Total Machining Power
Machining time Th = Lw [min] Pc - Net Power=Cutting Power
Vf Pm - Motor Power (while not cutting)
Specific cutting
force Kc = Kc1 ∙ hm-mc [N/mm2] (1) See page 726

Average chip hm ≈ fz ∙ √ bD [mm] Values for Motor Power Pm
thickness in
shoulder milling Max. Machine Power [kW] Motor Power Pm [kW]
for b/D≤0.1 5.5 0.4
7.5 0.4-0.6
Average chip hm = (sink ∙ 180 ∙ b ∙ fz) [mm] 11.0 1.0
thickness in π ∙ D ∙ arcsin (b / D) 15.0 1.5
shoulder milling 18.0 2.2
for b/D>0.1 P = ( ap ∙ b ∙ Vf ∙ kc ) [kW] 22.0 2.5
6 ∙ 107 ∙ h
Machining power Motor Power Pm has a value of approximately 7 to 12% of Maximum
Machine Power

546 ISCAR