High Speed Steel (HSS) End Mills

Comprehensive range of HSS & HSS-Co milling cutters engineered for steel, aluminum, and heavy-duty machining. Featuring AlTiN, DLC, and TiN PVD coatings. Direct factory pricing, OEM branding, and bulk wholesale distribution.

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High Speed Steel (HSS) End Mills
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Why Source HSS End Mills From Our Factory?

Superior Toughness

HSS offers exceptional transverse rupture strength, making it the ideal choice for interrupted cuts, less rigid machine setups, and heavy stock removal where carbide tools might chip.

Cost-Effective Resharpening

Unlike solid carbide, HSS end mills can be resharpened multiple times by your local tool room while maintaining the original geometry, drastically reducing long-term tooling costs.

HSS-Co Red Hardness

Our HSS-Co (M35/M42) variants contain 5-8% cobalt, providing exceptional red hardness (up to 800°C). Essential for continuous high-speed milling of abrasive alloy steels.

Advanced PVD Coatings

We apply AlTiN for steel heat resistance, DLC for aluminum anti-adhesion, and TiN for general wear resistance, ensuring optimal performance for every specific material.

Complete HSS End Mill Product Series

Engineered solutions for steel, aluminum, heavy-duty milling, and hole making. Available for immediate dispatch or OEM customization.

HSS 4-Flute End Mills for Steel

HSS 4-Flute End Mills for Steel

Premium HSS/HSS-Co (M35/M42) 4-flute mills. Choose AlTiN nano-coated or uncoated. D6-D25mm for precision steel machining.

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HSS Roughing End Mills for Steel

HSS Roughing End Mills for Steel

4-flute HSS/HSS-Co roughing mills with AlTiN. Scalloped edge for heavy steel stock removal. D6-D25mm.

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HSS End Mills for Aluminum

HSS End Mills for Aluminum

HSS/HSS-Co 3-flute aluminum end mills. DLC or uncoated. D6-D25mm for high-speed non-ferrous CNC milling.

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HSS Roughing End Mills for Aluminum

HSS Roughing End Mills for Aluminum

3-flute HSS/HSS-Co roughing mills with DLC/uncoated. Large gullet for aluminum chip flow. D6-D20mm.

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Large Diameter HSS End Mills

Large Diameter HSS End Mills

Uncoated HSS heavy duty end mills. 4-flute & 6-flute for large steel parts. D26-D52mm, resharpenable.

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HSS M35 Chamfer End Milll

HSS M35 Chamfer End Milll

HSS/HSS-Co chamfer cutters with TiN. 1-flute for aluminum, 3-flute for steel. 90° angle for CNC deburring.

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HSS Pilot Counterbore End Mills

HSS Pilot Counterbore End Mills

HSS/HSS-Co pilot counterbore mills with TiN coating. Integrated pilot for perfect concentricity. M3-M20 full range.

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Quick Selection Guide: Choose the Right HSS Mill

For Steel & Ferrous Metals

Use 4-Flute Steel Series (AlTiN Coated)

  • Carbon Steel (A36, 1045)
  • Alloy Steel (4140, 4340)
  • Mold Steel (P20, 718)
  • Cast Iron (GG20, GG30)
For Aluminum & Non-Ferrous

Use 3-Flute Aluminum Series (DLC / Uncoated)

  • Aluminum (6061, 7075, 5052)
  • Copper / Brass / Bronze
  • Plastics / Acrylic / Wood
  • Graphite
For Heavy Stock Removal

Use Roughing End Mills (Scalloped Edge)

  • Mold cavity roughing
  • Large volume material removal
  • Interrupted cuts & cast surfaces
  • Protecting CNC spindle load
For Edge Breaking & Bolt Holes

Use Chamfer Mills & Counterbore Cutters

  • Part edge chamfering & deburring
  • Weld preparation
  • Bolt hole spotfacing (Counterbore)
  • Ensuring flush fastener seating

Material Compatibility Matrix

Workpiece Material Recommended Series Coating / Substrate Key Benefits
Carbon / Alloy Steel (< 35 HRC) 4-Flute Steel / Roughing HSS-Co + AlTiN AlTiN prevents built-up edge; HSS-Co resists high heat.
Mold Steel (P20, 718) 4-Flute Steel HSS-Co + AlTiN Handles heat generated in mold milling; excellent for semi-finishing.
Aluminum (6061, 7075) 3-Flute Aluminum / Roughing HSS/HSS-Co + DLC DLC prevents material adhesion; 3-flute gullets prevent chip clogging.
Cast Iron (GG20, GG30) 4-Flute / Large Diameter HSS-Co + AlTiN/Uncoated Resists abrasive wear from graphite flakes. Use air blast.
Large Steel Plates / Bases Large Diameter Heavy-Duty Standard HSS (Uncoated) Superior toughness; 6-flute design suppresses chatter; easy resharpening.
Bolt Holes / Fastener Seats Pilot Counterbore Mills HSS-Co + TiN Integrated pilot ensures perfect concentricity and flush seating.

Frequently Asked Questions

Standard HSS is cost-effective and offers high toughness, making it ideal for general-purpose machining and unstable setups. HSS-Co (M35/M42) contains 5-8% cobalt, which drastically increases "red hardness." This allows HSS-Co to maintain edge sharpness at high cutting temperatures (up to 800°C), making it essential for continuous high-speed milling of abrasive alloy steels and cast iron.

Aluminum produces large, gummy chips. A 3-flute design provides significantly larger gullets (chip clearance) than a 4-flute tool. This prevents chip clogging and re-cutting, which are the primary causes of tool failure and built-up edge (BUE) in aluminum machining. Combined with DLC coating, it ensures zero material adhesion.

Uncoated HSS offers superior toughness and shock resistance, which is critical for large-diameter tools (D26-D52mm) that experience high cutting forces and intermittent cuts. Additionally, without a coating layer, these tools can be resharpened multiple times by your local tool room while maintaining the original geometry, making them highly cost-effective for heavy-duty operations.

Yes, as a direct manufacturer, we provide comprehensive OEM/ODM services. We can laser engrave your logo on the tools and create custom packaging (plastic tubes, blister boxes, or custom cartons) for bulk wholesale orders. Minimum Order Quantity (MOQ) for OEM services is typically 50-100 pcs per item.

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