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CoroMill® MS20
Shoulder milling redefined
- Secure operations thanks to the high levels of repeatability and predictability, making unmanned machining possible
- The robust and reliable interface enables secure and trouble-free machining
- Excellent dimensional control and top-level surface finish, due to the high accuracy of the concept
- Low overall tool consumption means increased cost-efficiency and a more sustainable business
Operation(s)
Drilling, Face milling, Square shoulder milling, Milling - groove, slot and rampingTool type
IndexableDiameter range
15.88–84 mmWorkpiece material(s)
True versatility — the power of a two-edged concept
Why choose a two-edged shoulder mill over a multi-edged cutter? While multi-edged cutters excel in specific tasks, the two-edged cutter offers greater versatility, making it the smarter all-round choice
CoroMill® MS20 handles all types of shoulder milling with ease and goes further, enabling face milling, ramping and helical interpolation, and full slot milling.
By combining multiple operations into a single cutter, you save time and reduce cost — all while promoting a more sustainable business.
Uncompromised excellence
You shouldn’t have to settle for compromises when it comes to shoulder milling. Whether you prioritize secure and trouble-free machining, high productivity or increased cost-efficiency, the new CoroMill® MS20 shoulder milling concept has got you covered.
A dependable powerhouse
CoroMill® MS20 boasts a robust cutter body and a dependable interface, delivering superior reliability, predictability, and security — without ever sacrificing performance.
Dual-edged perfection
The double-edged inserts offer optimized geometries for ISO P, ISO M and ISO S applications, ensuring superior performance and extended tool life.
GC1230, the new standard in steel milling
Grade GC1230 is a breakthrough in steel milling, combining two rarely achieved qualities: exceptional edge line toughness and outstanding wear resistance.
This performance is made possible by the innovative nano-multilayer coating produced with recognized Zertivo® PVD coating process technology, delivering durability and consistency in every application.
Whether you’re aiming for longer tool life, higher productivity, or a more sustainable machining process, GC1230 delivers in every cut.
Demo: CoroMill® MS20 in ISO P
Watch the CoroMill® MS20 take on roughing and finishing shoulder milling in ISO P with power and precision.
Article
Gain insights into the complexities of shoulder milling and learn how CoroMill® MS20 addresses these challenges. chevron_right
Demo: CoroMill® MS20 in ISO M and ISO S
CoroMill® MS20 for roughing and finishing shoulder milling applications, in ISO M and ISO S. Witness its capabilities by watching it in action.
Customer case film
Our channel partner ERGG and customer OMC shares their experiences using CoroMill® MS20, our first-choice two-edged milling concept.
Beyond the surface
Spotlight is on CoroMill® MS20, a top performer when it comes to secure and trouble-free machining, high productivity or increased cost-efficiency.
Proven success cases
+144%
In a power generation component application, we achieved a 144% increase in productivity using CoroMill® MS20. By optimizing cutting parameters and introducing a variable depth of cut, we effectively minimized notch wear and gained twice as longer tool life and 63% reduction in cycle time.
-57%
A customer machining ISO P that was struggling with a weak setup and frequent insert breakages turned to CoroMill® MS20. Thanks to its excellent edge security and predictable wear pattern, the tool delivered improved process stability, 175% more tool life and a cycle time reduction of 57%.
+28%
Replacing both a solid carbide end mill and a high-feed cutter, CoroMill® MS20 delivers a more secure and cost-effective solution in a ISO P application. By contouring the feature with a single tool, it reduces cycle time and increases productivity by 28%, maintaining surface quality.
Product range
Cutter body
- Diameter range: 15.8–84 mm (inch equivalent)
- Cutter body interface: Cylindrical shank, Coromant® EH, MSSC, Arbor, Coromant Capto® and Weldon (metric and inch)
- Cylindrical shank with Silent Tools® integrated damper: 20, 25 and 32 mm
- Entering angle (KAPR): true 90°
- Internal coolant
- Ramping capability
- CAPP family: M253
Inserts for ISO P
- Insert size: IC10
- Geometries: M-M20, M-M30 and M-M50
- Grades: GC1010, GC1230, GC4330, GC4340 and CT530
- Corner radii: 0.2, 0.4, 0.8, 1.2, 1.6, 2.0, 2.4 and 3.1
- Entering angle: true 90º
- Maximum depth of cut: 9 mm (0.354 inch)
- Recommended depth of cut: 4 mm (0.157 inch)
Inserts for ISO M and S
- Insert size: IC10
- Geometries: E-L50, M-M20 and M-M30
- Grades: GC1040, GC2040, S30T and S40T
- Corner radii: 0.2, 0.4, 0.8, 1.2, 1.6, 2.0, 2.4 and 3.1
- Entering angle: true 90º
- Maximum depth of cut: 9 mm (0.354 inch)
- Recommended depth of cut: 4 mm (0.157 inch)
Assortment
Start by selecting one or more products
Start by selecting one or more products
Success stories
Customer case
Industry segment: General engineering
Component: Inner suspension block
Material: P1.1.Z.AN (S355J2), HB140–180, mild steel
Operation: Flamecut profiles
Machine: Mazak Vertical Smart 530C BT40
 |  | |
| Competitor | Sandvik Coromant | |
| Tool | - | MS20-R050Q22-10M |
| Insert | - | MS20-10T308M-M30 1230 |
| DCX, mm (inch) / zn | 50 (1.97) / 5 | 50 (1.968) / 7 |
| vc, m/min (ft/min) | 138 (453) | 200 (656) |
| n, rpm | 879 | 1273 |
| fz, mm/z (inch/z) | 0.44 (0.017) | 0.30 (0.012) |
| vf, mm/min (in/min) | 1944 (76.5) | 2674 (105) |
| ap, mm (inch) | 1 (0.039) × 10 passes | 1 (0.039) × 10 passes |
| ae, mm (inch) | 41 (1.61) | 41 (1.61) |
| Time in cut / comp | 140 sec | 101 sec |
| Tool life per edge | 55–60 components | 101 components |
Results
+26%
Productivity
+46%
Tool life
The customer faced excessive burr formation that required frequent manual grinding, especially after machining 30 components.
With CoroMill® MS20, burrs were significantly reduced, cutting down manual deburring. Despite having only 2 edges versus the previous 8, tool life remained excellent.
Customer case
Industry segment: Aerospace
Component: Aerospace part
Material: Ti S4.3.Z.AN (TC11, HRC28–32)
Operation: Rough face and shoulder milling (wet)
Machine: BMEI BM100 (BT40)
Results
82%
Productivity
180%
Tool life
Compared to the existing solution, CoroMill® MS20 displayed an impressing 82% productivity increase and 180% longer tool life.
Higher productivity leading to 2985 kWh power savings and 1.2 metric tons less CO2 emission per year.
How to use
Insert geometries
ISO P
M-M20
Direct-pressed geometry
- Light-cutting geometry for semi-finish and roughing applications with limited stability
- Good edge-line security and trouble-free machining at long overhangs to avoid vibrations
- Predictable and gradual wear characteristics
- First choice geometry for low-carbon steel with relatively long chipping characteristics
- Best performance to be achieved together with PVD grades
M-M30
Direct-pressed geometry
- First choice geometry for all ISO P applications
- Strong radius for higher security around the corner
- Highest metal removal rate in stable shoulder milling applications
- Controlled wear at the radius, ensuring better performance in pocketing and contouring (ae ≤ 25%) applications
M-M50
Direct-pressed geometry
- First choice for medium and heavy roughing applications
- Strong radius for higher security around the corner with the highest cutting forces
- Highest metal removal rate in stable applications, especially face milling
- Best performance to be achieved together with CVD grades
ISO M and S
E-L50
Periphery-ground geometry
- Optimized geometry for shoulder milling and pocketing applications in titanium
- 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
M-M20
Direct-pressed geometry
- Optimized geometry for austenitic stainless steel materials and all application areas, especially for shoulder milling
- Light-cutting geometry for duplex stainless steel and Inconel
- Good edge-line security and trouble-free machining at long overhangs
- Predictable and gradual wear characteristics
M-M30
Direct-pressed geometry
- First choice for medium and heavy applications in duplex SS and Inconel
- 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 in all ISO S and ISO M materials
Cutting data recommendations
hex recommendations
| ISO area | Grades | hex, mm (inch) | hex, mm (inch) | hex, mm (inch) | hex, mm (inch) |
| | | E-L50 | M-M20 | M-M30 | M-M50 |
| P2.1.Z.AN | 1230, 4330, 4340, 530 | 0.08 (0.05–0.1) (0.003 (0.002–0.004)) | 0.12 (0.08–0.15) (0.0047 (0.003–0.006)) | 0.15 (0.1–0.2) (0.006 (0.004–0.008)) | |
| K2.2.C.UT | 1010, 4330 | 0.08 (0.05–0.1) (0.003 (0.002–0.004)) | 0.12 (0.08–0.15) (0.0047 (0.003–0.006)) | 0.15 (0.1–0.2) (0.006 (0.004–0.008)) | |
| H1.3.Z.HA | 1010 | 0.08 (0.05–0.1) (0.003 (0.002–0.004)) | 0.08 (0.05–0.1) (0.003 (0.002–0.004)) | ||
| M1.0.Z.AQ (1.4404/316L) | 1040, 2040 | 0.1 (0.05–0.15) (0.004 (0.002–0.006)) | 0.1 (0.08–0.15) 0.004 (0.003–0.006)) | | |
| M3.2.Z.AQ (SAF2205) | 1040, 2040 | 0.08 (0.05–0.12) (0.003 (0.002–0.0047)) | 0.08 (0.05–0.12) 0.003 (0.002–0.0047)) | | |
| S4.2.Z.AN (TiAl6V4) | S30T | 0.1 (0.05–0.15) (0.004 (0.002–0.006)) | 0.1 (0.08–0.15) (0.004 (0.003–0.006)) | 0.13 (0.08–0.2) (0.0051 (0.003–0.008)) | |
| S2.0.Z.AG (Inconel 718) | S30T, 2040 | 0.08 (0.05–0.12) (0.003 (0.002–0.0047)) | 0.08 (0.05–0.12) (0.003 (0.002–0.0047)) | 0.1 (0.08–0.15) (0.004 (0.003–0.006)) |
Cutting speed
| Material | Grade | vc, m/min | vc, ft/min |
| P2.1.Z.AN | 1230 | 325 (220–365) | 1066 (722–1198) |
| 4330 | 310 (240–335) | 1017 (787–1099) | |
| 4340 | 260 (202–285) | 853 (663–935) | |
| 530 | 340–360 | 1115–1181 | |
| K2.2.C.UT | 1010 | 220–235 | 722–771 |
| 4330 | 205–220 | 673–720 | |
| H1.3.Z.HA | 1010 | 115–125 | 377–410 |
| M1.0.Z.AQ (1.4404 / 316L) | 1040 | 135 (115–155) | 443 (377–509) |
| 2040 | 120 (105–135) | 394 (344–443) | |
| S30T | 135 (115–155) | 443 (377–509) | |
| S40T | 210 (185–235) | 689 (607–771) | |
| M3.2.Z.AQ (SAF2205) | 1040 | 105 (90–110) | 344 (295–361) |
| 2040 | 125 (110–130) | 410 (361–427) | |
| S30T | 120 (105–130) | 394 (344–427) | |
| S40T | 120 (110–130) | 394 (361–427) | |
| S4.2.Z.AN (TiAl6V4) | 2040 | 40 (35–45) | 131 (115–148) |
| S30T | 50 (40–65) | 164 (131–213) | |
| S40T | 40 (35–45) | 131 (115–148) | |
| S2.0.Z.AG (Inconel 718) | 2040 | 35 (35–40) | 115 (115–131) |
| S30T | 35 (30–35) | 115 (98–115) | |
| S40T | 30 (25–35) | 98 (82–115) |
APMX, AZ and BS
| APMX | 9.0 mm (0.35 inch) |
| Recommended ap | 4.0 mm (0.16 inch) |
| AZ | 1.0 mm (0.04 inch) |
| BS (RE0.2–RE2.0) | 1.2 mm (0.047 inch) |
| BS (RE2.4) | 1.0 mm (0.039 inch) |
| BS (RE3.1) | 0.2 mm (0.008 inch) |
Linear and helical ramping
| DCX, metric | DCX, inch | RMPX (deg) | LM, mm (inch) | Max Dm, mm (inch) | Flat min Dm, mm (inch) | Min Dm, mm (inch) |
| | ⅝" | 7.8 | 65.7 (2.85) | 30.15 (1.19) | 27.75 (1.08) | 23.75 (0.93) |
| 16 mm | | 7.7 | 66.6 (2.61) | 30.4 (1.2) | 28 (1.10) | 25 (0.97) |
| | ¾" | 5.4 | 95.2 (2.57) | 36.5 (1.44) | 34.1 (1.33) | 30.1 (1.18) |
| 20 mm | | 4.9 | 105 (4.13) | 38.4 (1.50) | 36 (1.42) | 33 (1.3) |
| 25 mm | | 3.3 | 156.1 (6.15) | 48.4 (1.91) | 46 (1.80) | 43 (1.68) |
| | 1" | 3.2 | 161 (6.34) | 46.8 (1.82) | 46.8 (1.83) | 42.8 (1.68) |
| | 1 ¼" | 2.2 | 234.3 (9.21) | 61.9 (2.44) | 59.5 (2.33) | 55.5 (2.18) |
| 32 mm | | 2.2 | 234.3 (9.21) | 62.4 (2.46) | 60 (2.35) | 57 (2.23) |
| | 1 ½" | 1.7 | 303.2 (11.94) | 72.2 (2.83) | 72.2 (2.83) | 68.2 (2.68) |
| 40 mm | | 1.6 | 322.2 (12.68) | 78.4 (3.09) | 76 (2.98) | 73 (2.86) |
| 50 mm | | 1.2 | 429.7 (16.92) | 98.4 (3.86) | 96 (3.78) | 93 (3.65) |
| | 2" | 1.2 | 429.7 (16.92) | 97.6 (3.83) | 97.6 (3.83) | 93.6 (3.68) |
| 54 mm | 1.1 | 468.8 (18.46) | 106.4 (4.19) | 104 (4.09) | 101 (3.98) | |
| 63 mm | 0.9 | 572.9 (22.56) | 124.4 (4.90) | 122 (4.80) | 119 (4.69) | |
| 2 ½" | 0.9 | 572.9 (22.56) | 125.4 (4.94) | 123 (4.84) | 120 (4.72) | |
| 66 mm | 0.8 | 644.6 (25.38) | 130.4 (5.13) | 128 (5.04) | 125 (4.92) | |
| 3" | 0.7 | 736.7 (29.00) | 151.2 (5.95) | 148.8 (5.86) | 145.8 (5.74) | |
| 80 mm | 0.7 | 736.7 (29.00) | 158.4 (6.24) | 156 (6.14) | 153 (6.02) | |
| 84 mm | 0.6 | 859.4 (33.83) | 166.4 (6.55) | 164 (6.46) | 161 (6.34) |
Plunge milling
| ISO area | Insert geometry | Max ae, mm (inch) | Feed, mm/z (in/z) |
| ISO P | M-M20 | 4 (0.157) | 0.08 (0.05–0.10) (0.003 (0.002–0.004)) |
| ISO P | M-M30, M-M50 | 4 (0.157) | 0.10 (0.05–0.12) (0.004 (0.002–0.005)) |
| ISO M | E-L50 | 4 (0.157) | 0.10 (0.08–0.15) (0.004 (0.003–0.006)) |
| ISO M | M-M20, M-M30 | 4 (0.157) | 0.08 (0.05–0.12) (0.003 (0.002–0.0004)) |
| ISO S | E-L50 | 3 (0.118) | 0.08 (0.05–0.12) (0.003 (0.002–0.0004)) |
| ISO S | M-M20, M-M30 | 3 (0.118) | 0.08 (0.05–0.12) (0.003 (0.002–0.0004)) |
Application recommendations
Variable depth of cut
- For increased insert tool wear especially in ISO M materials, depth of cut (ap) can be modified at each pass so that the notch wear will develop slower
- Value of the offset for ap: 25–75% of APMX
2.5 to 6.5 mm (0.098 to 0.256 inch) recommended for CoroMill® MS20
Use of large radius
- A bigger corner radius of the insert increases security, especially in cornering for pocket milling operations, as well as ramping with bigger ramping angle value
- Cutting force / spindle load will increase
- Surface finish will be inferior
- May lead to vibrations in overhang applications
- When used at ap ≤85% RE, the notch wear characteristic is minimized
- When used at ap ≤ 50% RE, high-feed milling strategies can be applied
Note: When using inserts with RE>1.6 mm (0.063 inch), a Tailor Made® cutter body with the appropriate clearance radius is recommended.
Fixture limitations
- Fixturing must be considered when choosing direction of cut and while changing direction
- Direction of cut towards the machine table gives highest stability followed by rigid support directly mounted on the table
Machining challenges
ISO P
Applications
- Shoulder milling with long overhang
- Batch production with various types of ISO P material and various set-ups
- Shoulder milling tool used as a versatile face milling cutter
Challenges
- Vibration
- Long overhang machining
- High metal removal rates
- Versatile solution is needed for various applications
- Spindle load
- Dry and wet machining
CoroMill® MS20 solution
- M-M20 with GC1230 (CVD) grade will generate light cutting forces, hence reducing the vibration
- Silent Tools® integrated adaptors will help reduce vibration
- The allrounder M-M30 geometry can handle almost all types of ISO P shoulder milling applications
- Long contact + Wet machining: M-M30 + 4340
- Short contact + Wet machining: M-M30 + 1230
- Long contact + dry machining: M-M30 + 4330
- Short contact + dry machining: M-M30 +1230
- For face milling (diameter above 50 mm): M-M50 geometry + CVD + Dry machining gives best performance.
ISO M
Applications
- Oil and gas open and closed pocket milling
- Full slotting and hole making with helical ramping cycles
- Long overhang cavity milling
- Low engagement shoulder milling
- Multi-task turn milling
Challenges
- Chip formation
- Insert security and reliability
- Long overhang machining
- Predictable and repeated tool life
CoroMill® MS20 solution
- Use M-M20 geometry for excellent chip formation and evacuation in sticky materials
- M-M30 geometry gives higher security in tougher materials (duplex). Higher edge line toughness of the geometry allows the insert to be used with higher productivity (high cutting data) in stable operations
- Use E-L50 geometry for long overhang applications where a sharper and hence lighter cutting edge will help reduce vibrations
- Robust steel shank design ensures better stability and less deflection
- The two cutting edges have equal tool life and the M-M20 geometry provides predictable and gradual wear characteristics, especially in austenitic stainless steel
ISO S
Applications
- Aerospace frame open and closed pocket milling
- Full slotting and hole making with helical ramping cycles
- Long overhang cavity milling
- Low engagement shoulder milling
- Multi-task turn milling
Challenges
- Chip evacuation
- Insert security and reliability
- Tool life
- Cutter body damage (chip rubbing)
CoroMill® MS20 solution
- Use E-L50 geometry for excellent chip formation and evacuation in sticky materials
- M-M20 and M-M30 geometries give higher security in tougher applications in titanium and Inconel, respectively
- The higher edge line toughness of these geometries allows the inserts to be used with higher productivity (high cutting data) in stable operations
- Robust steel shank design ensures better stability and less deflection. The improved tool body material can withstand chip rubbing better
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, higher productivity or machine with a more sustainable approach.
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Sandvik Coromant UK
+44 (0)121 368 0305