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CoroMill® MR20
Performance and predictability in every cut
- Innovative insert seat design with superior stability and easy indexing improves process security
- Robust interface minimizes insert micro-movements, ensuring secure, trouble-free machining
- Tight cutter body tolerances guarantee predictable and progressive insert wear, for improved surface quality
- Thick and robust insert body ensures high security and reliability
- Optimized geometries tailored for ISO S, ISO M, and ISO P materials
- Under-coolant system extends tool life
Operation(s)
Drilling, Face milling, Profile milling, Square shoulder millingTool type
IndexableDiameter range.
19.05–111 mmWorkpiece material(s)
Demo: CoroMill® MR20
Controlled profiling with unmatched stability and security
When machining high-value components, process reliability and predictability are non-negotiable. CoroMill® MR20 delivers just that – trust in every cut.
Its innovative design ensures superior stability, enabling secure operations and consistent results.
Watch CoroMill® MR20 in action and experience trouble-free profiling versatility, while boosting process productivity and confidence.
Engineered for consistency
The cutter body is engineered with tight tolerances for predictable and progressive insert wear, while the integrated under-coolant system extends tool life and enhances performance. Combined with precise dimensional control across tool bodies and inserts, CoroMill® MR20 delivers top-level reliability and operational consistency.
Innovative insert seat
A large contact area between the insert and tool body minimizes micro-movements, delivering maximum stability and trouble-free machining. The precise tip seat position and clear position mark on the cutter body make insert indexing fast, easy and accurate.
Strength meets predictability
The six-edged insert features a thick, robust body for exceptional bulk strength and superior edge-line security, ensuring reliable process stability. High process predictability minimizes scrap and delivers consistent cost-per-part performance.
Boost metal cutting efficiency and keep machines running at peak performance
- Lower cutting forces and reduced vibration enable stable, high-productivity machining
- A dense tooth configuration drives higher material removal rates for faster throughput
- Optimized geometries for different ISO areas deliver high cutting efficiency with increased feed capabilities across materials
- Longer tool life and predictable wear patterns minimize unplanned stops
The result:
Higher machine utilization.
Reduced cycle times.
Minimized stops.
Product range
Cutter body
- Diameter range: 32–125 mm (1.25–5 inch)
- Cutter body interface: Cylindrical shank, Coromant® EH, Arbor, Coromant Capto® and MSSC
- Internal coolant
- Ramping capability
Inserts
- Insert size: IC12, IC13, IC16
- Geometries: E-L40, E-L60, M-M30 and M-M60
- Grades: GC1230, GC1240, GC2040, GC4330, GC4340 and S30T
- Maximum depth of cut: IC/2
- Recommended depth of cut, IC12/IC13/IC14: 3.0/3.175/4.0 mm (0.118/0.125/0.157 inch)
Assortment
Start by selecting one or more products
Start by selecting one or more products
Success stories
Inconel 625 face milling
Component: Valve body
Material: S2.0.Z.AN, Inconel 625
Operation: Face milling
Machine: MAZAK INTEGREX 670H - CAPTO C8
Coolant: Competitor: internal, CoroMill® MR20: external
 |  | |
| Competitor | CoroMill® MR20 | |
| Tool | - | MR20-R100Q32-16H |
| Insert | - | MR20-1654M-M30 1230 |
| DCX, mm (inch) / zn | 100 (3.94) / 7 | 100 (3.94) / 9 |
| Tool overhang, mm (inch) | 225 (8.86) | 225 (8.86) |
| vc, m/min (ft/min) | 39 (128) | 36 (118) |
| n, rpm | 125 | 115 |
| fz, mm (inch) | 0.285 (0.011) | 0.285 (0.011) |
| vf, mm/min (in/min) | 250 (9.84) | 300 (11.81) |
| ap / ae, mm (inch) | 2.5 / 75 (0.098 / 2.95) | 2.5 / 75 (0.098 / 2.95) |
| Q, cm3/min (in3/min) | 46.49 (2.84) | 55.4 (3.38) |
| Tool life | 10 minutes, 1 component | 16.6 minutes, 2 components |
Result
+29%
Productivity increase
3.60€
Direct save per component
The customer was experiencing instability due to long tool overhang. Additionally, the hard skin on the component was leading to rapid insert wear. The customer wanted to improve tool life and enhance process reliability.
By using a cutter with additional teeth, we successfully reduced the cycle time. Despite using external coolant (due to adaptor set-up), the M-M30 geometry with grade GC1230 also resulted in higher tool life.
Inconel 718, energy component
Component: Hammer
Material: S2.0.Z.AN, Inconel 718
Operation: Face milling
Machine: OKUMA, MCV-A, BT50 vertical milling machine
Coolant: Internal
Result
+50%
Productivity increase
-28%
CO2 emissions per year
The customer is machining a high-value component and needs to improve cycle time without compromising quality or tool performance.
By using a cutter with additional teeth, we increased the table feed and reduced the cycle time. This resulted in a 50% increase in productivity. The new grade and geometry also resulted in a longer tool life.
Profiling in duplex
Component: Die and mold stamp
Material: M3.1.Z.AQ, Duplex, 240Hb
Operation: Semi-finish profiling operation
Machine: DMG DMU 80 eVo Linear
Coolant: Internal coolant, 40 bar (580 PSI)
 |  | ||
| Competitor | CoroMill® MR20 | CoroMill® MR20 | |
| Tool | - | MR20-R050Q22-12H | MR20-R050Q22-12H |
| Insert | - | MR20-1245M-M30 1230 | MR20-1245M-M30 1230 |
| DCX, mm (inch) / zn | 50 (1.97) / 6 | 50 (1.97) / 6 | 50 (1.97) / 6 |
| Tool overhang, mm (inch) | 65 (2.56) | 65 (2.56) | 65 (2.56) |
| vc, m/min (ft/min) | 110 (361) | 110 (361) | 140 (460) |
| n, rpm | 702 | 702 | 891 |
| fz, mm (inch) | 0.16 (0.0062) | 0.16 (0.0062) | 0.16 (0.0062) |
| vf, mm/min (in/min) | 672 (26.5) | 627 (26.5) | 846 (34.01) |
| ap / ae, mm (inch) | 2.0 / 30 (0.079 / 1.18) | 2.0 / 30 (0.079 / 1.18) | 2.0 / 30 (0.079 / 1.18) |
| Q, cm3/min (in3/min) | 40.32 (2.46) | 40.32 (2.46) | 53.46 (3.26) |
| Tool life | 12 minutes, 0.34 components | 70 minutes, 2 components | 24 minutes, 0.7 components |
Result
+32%
Productivity increase
13.75€
Direct save per component
In the customer’s current set-up, three edge changes are needed to complete one component. They want to extend the tool life.
With CoroMill® MR20, the customer could finish two components with one edge. CoroMill® MR20 also has a lighter cutting effect, with a consistent 16% spindle power consumption compared to approximately 23% for the competitor. A second test was performed to increase productivity.
How to use
Insert geometries
E-L40
Periphery-ground geometry
- First choice in ISO M dry machining
- Sharp and light-cutting geometry
- Good for sticky materials and lower depth of cuts
E-L60
Periphery-ground geometry
- First choice in titanium and ISO M wet machining
- Reliable geometry for tougher operations
- Typical application is titanium pockets
M-M30
Direct-pressed geometry
- First choice for ISO P and ISO S (nickel-based alloys)
- Medium-cutting geometry covering a wide feed range
- Good strength for interrupted cuts and components with hard skins
M-L60
Direct-pressed geometry
- First choice for tough conditions in ISO P and K
- Strong and reinforced geometry for higher feed rates
- Highest metal removal rate in stable applications
Cutting data recommendations
hex recommendations
| Material | Geometry | hex recommendations | |
| mm | inch | ||
| M1.0.Z.AQ (1.4404 / 316L) |
E-L40 | 0.12 (0.05–0.20) | 0.0047 (0.0020–0.0079) |
| E-L60 | 0.13 (0.08–0.25) | 0.0051 (0.0031–0.0098) | |
| M-M30 | 0.15 (0.10–0.25) | 0.0059 (0.0039–0.0098) | |
| M3.2.Z.AQ (SAF2205) |
E-L40 | 0.10 (0.05–0.20) | 0.0039 (0.0020–0.0079) |
| E-L60 | 0.13 (0.08–0.25) | 0.0051 (0.0031–0.0098) | |
| M-M30 | 0.15 (0.10–0.30) | 0.0059 (0.0039–0.0118) | |
| S4.2.Z.AN (TiAl6V4) |
E-L60 | 0.12 (0.08–0.25) | 0.0047 (0.0031–0.0098) |
| M-M30 | 0.15 (0.10–0.30) | 0.0059 (0.0039–0.0118) | |
| S2.0.Z.AG (Inconel 718) |
E-L60 | 0.12 (0.08–0.25) | 0.0047 (0.0031–0.0098) |
| M-M30 | 0.15 (0.10–0.30) | 0.0059 (0.0039–0.0118) | |
| P2.1.Z.AN | E-L60 | 0.15 (0.08–0.22) | 0.0059 (0.0031–0.0087) |
| M-M30 | 0.20 (0.10–0.30) | 0.0079 (0.0039–0.0118) | |
| M-M60 | 0.25 (0.13–0.37) | 0.0098 (0.0051–0.0146) | |
| K2.2.C.UT | M-M30 | 0.2 (0.08–0.30) | 0.0079 (0.0031–0.0118) |
| M-M60 | 0.25 (0.13–0.37) | 0.0098 (0.0051–0.0146) | |
Cutting speed, ae<30%
|
Material |
Grade |
vc, m/min |
vc, ft/min |
| M1.0.Z.AQ (1.4404 / 316L) | GC1240 | 140 (80–160) | 459 (262–525) |
| GC2040 | 125 (90–140) | 410 (295–459) | |
| S30T | 140 (90–160) | 459 (295–525) | |
| M3.2.Z.AQ (SAF2205) | GC1240 | 110 (80–115) | 361 (262–377) |
| GC2040 | 130 (90–140) | 427 (295–459) | |
| S30T | 125 (90–135) | 410 (295–443) | |
| S4.2.Z.AN (TiAl6V4) | GC2040 | 55 (35–80) | 180 (115–262) |
| S30T | 70 (35–95) | 230 (115–312) | |
| GC1230 | 50 (35–60) | 164 (115–197) | |
| S2.0.Z.AG (Inconel 718) | GC2040 | 45 (35–50) | 148 (115–164) |
| S30T | 40 (35–55) | 131 (115–180) | |
| GC1240 | 40 (35–50) | 131 (115–164) | |
| P2.1.Z.AN | GC1230 | 275 (150–325) | 902 (492–1066) |
| GC4330 | 250 (175–285) | 820 (574–935) | |
| GC4340 | 215 (150–245) | 705 (492–804) | |
| K2.2.C.UT | GC4330 | 165 (120–190) | 541 (394–623) |
| GC4340 | 150 (110–170) | 492 (361–558) |
Axial engagement
| IC12 | IC13 | IC16 | |
|---|---|---|---|
| Recommended ap 6 indexes, mm (inch) |
3.0 (0.118) | 3.175 (0.125) | 4.0 (0.157) |
| Max. recommended ap, APMX, mm (inch) |
6.0 (0.236) | 6.35 (0.250) | 8.0 (0.315) |
Linear and helical ramping
IC12
| DCX, metric | DCX, inch | RMPX (deg) | LM, mm (inch) | Min Dm, mm (inch) | Flat min Dm, mm (inch) | Max Dm, mm (inch) |
| 32 mm | 13° | 26.0 (1.023) | 42 (1.65) | 52 (2.04) | 63 (2.48) | |
| 35 mm | | 10.5° | 32.4 (1.275) | 48 (1.89) | 58 (2.28) | 69 (2.715) |
| 40 mm | | 8.0° | 42.7 (1.681) | 58 (2.28) | 68 (2.67) | 79 (3.11) |
| 42 mm | | 7.5° | 45.6 (1.795) | 62 (2.44) | 72 (2.83) | 83 (3.26) |
| 50 mm | | 5.5° | 62.3 (2.452) | 78 (3.07) | 88 (3.46) | 99 (3.89) |
| 52 mm | | 5.0° | 68.6 (2.700) | 82 (3.22) | 92 (3.62) | 103 (4.05) |
| 63 mm | | 3.5° | 98.1 (3.862) | 104 (4.09) | 114 (4.49) | 125 (4.92) |
| 66 mm | | 3.5° | 98.1 (3.862) | 110 (4.33) | 120 (4.72) | 131 (5.16) |
| 80 mm | 2.5° | 137.4 (5.409) | 138 (5.43) | 148 (5.82) | 159 (6.26) |
IC13
| DCX, metric | DCX, inch | RMPX (deg) | LM, mm (inch) | Min Dm, mm (inch) | Flat min Dm, mm (inch) | Max Dm, mm (inch) |
| 32 mm | 13° | 26.0 (1.023) | 42 (1.65) | 52 (2.04) | 63 (2.48) | |
| | 1½" | 8.5° | 42.5 (1.673) | 54 (2.12) | 64 (2.52) | 75 (2.95) |
| | 2" | 5.0° | 72.6 (2.858) | 79 (3.11) | 89 (3.50) | 100 (3.93) |
| 52 mm | | 4.5° | 80.7 (3.177) | 82 (3.22) | 92 (3.62) | 103 (4.05) |
| 63 mm | | 3.5° | 103.8 (4.086) | 104 (4.09) | 114 (4.49) | 125 (4.92) |
| 66 mm | | 3.0° | 121.2 (4.771) | 110 (4.33) | 120 (4.72) | 131 (5.16) |
| 3" | 3.0° | 121.2 (4.772) | 130 (5.12) | 140 (5.51) | 151 (5.94) |
IC16
| DCX, metric | DCX, inch | RMPX (deg) | LM, mm (inch) | Min Dm, mm (inch) | Flat min Dm, mm (inch) | Max Dm, mm (inch) |
| 52 mm | 7.0° | 65.2 (2.567) | 75 (2.95) | 88 (3.46) | 103 (4.05) | |
| 63 mm | | 5.0° | 91.4 (3.598) | 97 (3.82) | 110 (4.33) | 125 (4.92) |
| 66 mm | 4.5° | 101.6 (3.992) | 103 (4.05) | 116 (4.57) | 131 (5.16) | |
| 3" | 3.5° | 130.8 (5.149) | 124 (4.88) | 136 (5.35) | 151 (5.94) | |
| 80 mm | | 3.5° | 130.8 (5.149) | 131 (5.16) | 144 (5.67) | 159 (6.26) |
| 100 mm | | 2.5° | 183.2 (7.212) | 171 (6.73) | 184 (7.24) | 199 (7.83) |
| | 4" | 2.5° | 183.2 (7.212) | 174 (6.85) | 187 (7.36) | 202 (7.95) |
| 125 mm | | 1.94° | 236.4 (9.307) | 221 (8.70) | 234 (9.21) | 249 (9.80) |
| 5" | 1.9° | 241.3 (9.500) | 225 (8.86) | 238 (9.37) | 253 (9.96) |
Plunge milling
| ISO area | Reference material | Max ae, mm (inch) | Feed, mm/z | Feed, in/z |
| ISO M | M1.O.Z.AQ (1.4404/316L) |
IC12/13: 9 (0.354) IC16: 12 (0.472) |
0.07 (0.05–0.12) | 0.003 (0.002–0.005) |
| M3.2.Z.AQ (SAF2205) |
0.07 (0.05–0.12) | 0.003 (0.002–0.005) | ||
| ISO S | S4.2.Z.AN (TiAl6V4) |
0.07 (0.05–0.12) | 0.003 (0.002–0.005) | |
| S2.0.Z.AG (Inconel 718) |
0.07 (0.05–0.12) | 0.003 (0.002–0.005) | ||
| ISO P | P2.1.Z.AN | 0.09 (0.05–0.15) | 0.004 (0.002–0.006) | |
| ISO K | K2.2.C.UT | 0.09 (0.05–0.15) | 0.004 (0.002–0.006) |
Machining challenges
ISO S
Applications
- Aerospace components, frame open and closed pocket milling
- Hole making with helical ramping cycles
- Long overhang cavity milling
- Face milling applications with low Hex or rough face milling application
- Multi-task turn milling
Challenges
- Chip evacuation
- Insert security and reliability
- Tool life on heat resistant alloys
- Cutter body damage (chip rubbing)
- High value components
CoroMill® MR20 solution
- E-L60 geometry is the first choice for excellent chip formation and tool life in titanium
- M-M30 geometry, in combination with S30T and GC1230, offers higher security with improved tool life in S2 nickel-based alloys
- The higher edge line toughness of M-M30 geometry allows for increased cutting data in stable operations, enabling higher productivity
- Six edges per insert with predictable and gradual wear characteristics
- Overall tool security together with tolerances ensure high value component integrity on all kinds of application
- Large assortment of shanks available, enabling assembly on multi-task machines and turning machines with driven units
ISO M
Applications
- Oil and gas face milling and pocket milling
- Hole making with helical ramping cycles
- Long overhang cavity milling
- Face milling applications with low hex or rough face milling applications
- Multi-task turn milling
Challenges
- Chip formation and evacuation
- Insert security and reliability
- Long overhang machining
- Predictable and repeatable tool life
CoroMill® MR20 solution
- Use E-L40 for excellent chip formation and evacuation
- E-L60 offers higher security, despite its periphery-ground geometry. Higher edge line toughness allows for increased cutting data in stable operations
- Use E-L40 geometry for long overhang applications. The sharp and lighter cutting edge helps reduce vibrations
- M-M30 direct press geometry to work on ISO M when critical conditions, tougher applications or higher chip thickness are required.
- Six edges per insert with predictable and gradual wear characteristics, especially in austenitic stainless steel
- Large assortment of shanks available, enabling assembly on multi-task machines
ISO P
Applications
- Die and mold profiling operations
- Hole making with helical ramping cycles
- Long overhang cavity milling
- Face milling applications with low hex or rough face milling applications
Challenges
- Insert security and reliability
- Long overhang machining
- Predictable and repeatable tool life
CoroMill® MR20 solution
- M-M30, in combination with grade GC1230 is the first choice for optimal and predictable tool life
- M-M60 is the ideal choice in difficult cutting conditions or when aiming to increase feed rates to achieve higher productivity on roughing operations
- E-L60 is an alternative when higher quality in profiling operations is required. Its close tolerance contributes to superior surface finish
- Use E-L60 for long overhang applications. The sharp and lighter cutting edge helps reduce vibrations
- Six edges per insert with predictable and gradual wear characteristics
GC1230, a grade that excels in every direction
Grade GC1230 excels in both edge line toughness and wear resistance, allowing you to go for longer tool life or higher productivity, or machine with a more sustainable approach.
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Sandvik Coromant US - Mebane, NC
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