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CoroMill® MH20

High feed pocket milling

Instructions

Maximum depth of cut (APMX)

The maximum depth of cuts are:
IC06: 0.8 mm (0.031 inch)
IC08: 1.3 mm (0.051 inch)

Ramping angle (RMPX)

The ramping angles are:
IC06: 3.6°–10.1°
IC08: 1.7°–10.7°

Programming radius (REEQ)

The programming radii are:
IC06: 2.0 mm (0.079 inch)
IC08: 2.5 mm (0.098 inch)

Marking of geometries

The inserts have a prominent marking to differentiate the geometries.

Application tips

Three keys to successful ramping

Three keys to successful ramping

Ramping is an efficient way to approach the workpiece when machining pockets. There are three key considerations that need to be correctly applied for successful ramping operations.

Plunging

Plunging

When plunge milling you should use an extra-close pitch to ensure multi-tooth engagement. Learn more important plunge milling tips for successful plunge milling operations.

Recommendations

Cod​​e keys

C​​​​utter body

M H 2 0 - (A) R 0 2 5 A 2 5 - 0 6 M
1 2 3 4 5 6 7 8 9 10 11
  1. Milling
  2. High feed
  3. Family = 2
  4. Version = 0
  1. Inch cutters
  2. R = Right hand
  3. DCX
  4. Coupling types
    A/O = Cylindrical (metric/inch)
    Q/R = Arbor (metric/inch)
    EH = EH adaptor
  1. Coupling size
  2. Insert size
  3. Pitch: L/M/H

Ins​ert

M H 2 0 - 0 8 0 4 2 5 M - M 2 0 1 1 3 0
1 2 3 4 5 6 7 8 9 10
  1. Milling
  2. High feed
  3. Family = 2
  4. Version = 0
  1. Insert size
  2. Thickness
  3. Programming radius
  4. Edge quality
    E: Periphery ground
    M: Direct pressed
  1. Geometry
  2. Grade

Geometries

E-L30 E-L50 M-M20 M-M50
Periphery-ground geometry Periphery-ground geometry Direct-pressed geometry Direct-pressed geometry
ISO S and M ISO S and M ISO P and H ISO P
  • Optimized geometry for pocketing applications in titanium and austenitic stainless steel
  • Light cutting
  • Closer tolerance ensures better component quality and higher insert tool life
  • Regulates chip formation and evacuation in sticky/long-chipping materials
  • Predictable and gradual wear characteristics
  • Medium and heavy cutting applications in ISO S and M
  • Optimized geometry for pocketing applications in Inconel
  • Highest metal removal rate in stable applications
  • Versatile geometry for all ISO P materials and all application areas, especially pocketing and ramping
  • Light cutting
  • Good edge-line security and trouble-free machining at long overhangs
  • Predictable and gradual wear characteristics
  • First choice for medium and heavy applications in ISO P
  • Strong radius for higher security around the corner
  • Highest metal removal rate in stable applications
  • Controlled wear at the radius ensuring better performance in pocketing and contouring (ae ≤ 25%) applications

Cutting data, feed recommendations

ISO area Grade Insert size Geometry fz, start value (min-max)
mm/z in/z
ISO S
(TiAl6V4)
S30T, S40T,
GC2040
IC06 E-L30 0.3 (0.1–0.6) .012 (.004–.024)
IC08 E-L30 0.45 (0.1–0.6) .018 (.004–.024)
IC06 E-L50 0.35 (0.1–0.6) .014 (.006-.024)
IC08 E-L50 0.5 (0.1–0.6) .020 (.006-.024)
ISO S
(Inconel)
S30T, S40T,
GC2040
IC06 E-L50 0.35 (0.1–0.6) .014 (.006-.024)
IC08 E-L50 0.5 (0.1–0.6) .020 (.006-.024)
ISO M
(316L)
GC1040,
GC2040,
S30T,
S40T
IC06 E-L30 0.3 (0.2–0.8) .012 (.008–.031)
IC08 E-L30 0.45 (0.2–0.8) .018 (.008–.031)
IC06 E-L50 0.35 (0.2–0.8) .014 (.008-.032)
IC08 E-L50 0.5 (0.2–0.8) .020 (.008-.032)
ISO P GC1130,
GC4340
IC06 M-M20 0.6 (0.2–0.8) .024 (.008–.031)
IC08 M-M20 0.7 (0.2–1.0) .028 (.008–.039)
IC06 M-M50 0.8 (0.45–1.0) .031 (.018–.039)
IC08 M-M50 1.0 (0.45–1.3) .039 (.018–.051)
ISO H GC1010,
GC1130
IC06 M-M20 0.45 (0.15–0.6) .018 (.006–.024)
IC08 M-M20 0.55 (0.1–0.8) .022 (.039–.031)

Cutting data, cutting speed recommendations

ISO area​ Grade vc, (min-max)
m/min ft/min
ISO S (TiAl6V4) S30T 75–115 246–377
S40T 75–100 246–328
GC2040 31–40 102–131
ISO S (Inconel) S30T 40–60 131–197
S40T 40–60 131–197
GC2040 40–60 131–197
ISO M (316L) GC1040 115–180 377–591
GC2040 160–225 525–738
S30T 155–250 509–820
S40T 165–235 541–771
ISO P GC1130 150–265 492–869
GC4340 150–265 492–869
ISO H GC1010 75–115 246–377

Helical ramping

Metric
cu​tters
(DCX)
Inch
cutters
(DCX)
IC06 inserts IC08 inserts
Max ap 0.8 mm (.031 inch) Max a​p 1.3 mm (.051 inch)
Max ramping angle
(RMPX)
Max Dm Flat min Dm Min Dm Max ramping angle
(RMPX)
Max Dm Flat min Dm Min Dm
5/8 10.1° 31.8 23.4 22.4
16 9.5° 32.0 23.6 22.6
3/4 6.5° 38.2 29.8 28.8 10.7° 38.2 27.6 26.1
20 5.8° 40.0 31.6 30.6 9.6° 40.0 29.4 27.9
25 3.7° 50.0 41.6 40.6 5.7° 50.0 39.4 37.9
1 3.6° 50.8 42.4 41.4 5.5° 50.8 40.2 38.7
114 3.6° 63.6 53.0 51.5
32 3.6° 64.0 53.4 51.9
112 2.7° 76.2 65.6 64.1
40 2.5° 80.0 69.4 67.9
44 2.3° 88.0 77.4 75.9
50 1.7° 100.0 89.4 87.9
2 1.7° 101.6 91.0 89.5
52 1.6° 104 93.4 91.9
54 1.5° 108 97.4 95.9
63 1.1° 126 115.4 113.9
212 1.1° 127 116.4 114.9
66 1.0° 132 121.4 119.9

Plunge milling

Overhang L ≤ 3×D

 

Note! S must be ≤ 20 mm

IC Max a​e, mm
(inch)
Feed, mm/z (in/z)
06 4 (0.157) 0.10 (0.05–0.15)
(0.004 (0.002–0.006))
08 5.5 (0.217) 0.12 (0.05–0.15)
(0.005 (0.002–0.006))

Overhang L ≥ 3×D

 

Note! S must be ≤ 20 mm

IC Max a​e, mm
(inch)
Feed, mm/z (in/z)
06 4 (0.157) 0.08 (0.05–0.15)
(0.003 (0.002–0.006))
08 5.5 (0.217) 0.1 (0.05–0.15)
(0.004 (0.002–0.006))​

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