M6420 Xtra·tec S3 High-Feed Cutter Mills Steel to Superalloys
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Nov. 9, 2026
2 min read
High-feed milling across steels and superalloys puts heavy loads on inserts and generates chips that need to clear the cut fast. Walter's M6420 Xtra·tec S3 is a high-feed, indexable insert milling cutter with a patent-pending chip clearance space design and an insert design that allows feeds up to 0.118 in. (3 mm) per tooth. The high feed per tooth shortens machining times on everything from steel to superalloys.
Applications
- Ramping and plunging
- Face milling
- Slot milling
- Pocket and circular interpolation milling
Industries
- Aerospace
- Energy
- General mechanical engineering
Who It's For
- Shops running steel, stainless, cast iron, and super alloys on one cutter body
- Operations consolidating several milling tasks onto one tool
- Shallow-depth, high-feed roughing where cycle time drives cost
Features
- Diameter: 2 to 4 in. (40 to 100 mm)
- Depth of cut: Up to 0.079 in. (2 mm)
- Feed per tooth: Up to 0.118 in. (3 mm)
- Approach angle: 20°
- Pitches: Two, for different requirements
- Cooling: Up to three channels per cutting edge
- Inserts: Double-sided ENMX with four cutting edges
- Insert grades: Tiger·tec Gold
- L5 "light" geometry: First choice for stainless steels and superalloys (ISO M and ISO S)
- M5 "medium" geometry: Universal for all ISO material groups; first choice for slot milling
- R5 "roughing" geometry: Maximizes feed rates; first choice for face milling steel and cast iron (ISO P and ISO K)
- Insert seat with a large contact surface supports inserts in the cut
- Reduced pocket deformation under high loads, based on FEM analysis
- High feed per tooth for short machining times
Walter USA, LLC
Greer, SC
(800) 945-5554
walter-tools.com
Contributors:
This piece was created with the help of generative AI tools and edited by our content team for clarity and accuracy.