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ProductsMicro Corner Radius End Mill Long Neck 4 Flute | Tungsten Carbide Deep Reach Cutter for Steel
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Micro Corner Radius End Mill Long Neck 4 Flute | Tungsten Carbide Deep Reach Cutter for Steel

High-precision Tungsten Carbide Micro Corner Radius End Mills (4 Flute, Long Neck) designed for deep rib processing in steel. Features high rigidity and extended effective lengths (4mm-25mm). In-stock with factory-direct pricing. Get a free sample today!

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Micro Corner Radius End Mill Long Neck 4 Flute For Steel

Product Function

This Tungsten Carbide Micro Corner Radius End Mill features a specialized Long Neck (Deep Reach) design with 4 Flutes, specifically engineered for high-precision machining of steel materials.
The "Micro Corner Radius" geometry combines the advantages of a square end mill and a ball nose end mill. It prevents chipping at the cutter tip (common in square mills) while offering better flat-surface finishing than ball mills. The "Long Neck" design resolves the challenge of machining deep ribs, slots, and cavities without shank interference, ensuring superior rigidity and minimizing tool deflection compared to standard long-flute cutters.

Product Features

  • Material: Premium Micro-Grain Tungsten Carbide substrate ensures high wear resistance and toughness.
  • Design: 4-Flute geometry provides excellent surface finish and chip evacuation in steel applications.
  • Geometry: High-precision Corner Radius (R0.1 / R0.2) protects the cutting edge and extends tool life in hardened materials.
  • Long Neck: A wide range of effective lengths (4mm to 25mm) allows for deep cavity machining while maintaining tool strength.
  • Coating: Advanced coating (e.g., TiSiN/AlTiN) for heat resistance and dry machining capabilities.
  • Tolerance: Strictly controlled diameter and radius tolerance for mold and die making.

Specifications

We offer a comprehensive range of sizes in stock. Below is our standard specification list tailored for steel machining.
Cutter Dia (mm) D
Corner Radius (R)
Shank Dia (mm) d
Flute Length (mm) L2
Effective Length (Neck) (mm)
OAL (mm)L1
1.0
R0.1 / R0.2
4
2.5
4, 5, 6, 8, 10, 12, 14, 15, 16, 18, 20
50
1.5
R0.1 / R0.2
4
3.8
6, 8, 10, 12, 14, 15, 16, 18, 20
50
2.0
R0.1 / R0.2
4
5.0
8, 10, 12, 14, 15, 16, 18, 20
50
3.0
R0.1 / R0.2
4
7.5
10, 12, 14, 15, 16, 18, 20, 25*
50 / 60*
3.0
R0.1 / R0.2
6
7.5
10, 12, 14, 16, 18, 20, 25*
50 / 60*
(Note: Please select the specific Effective Cutting Length required for your project depth.)

RPM/Feed Reference

Target Material: Carbon Steel, Alloy Steel, Mold Steel (up to HRC 45-55)
Cutter Dia (mm)
RPM (min-1)
Feed Rate (mm/min)
Feed per Tooth (fz)
Max Depth (Ap)
1.0
18,000 - 30,000
400 - 800
0.005 - 0.015
0.02 - 0.05
1.5
12,000 - 20,000
600 - 1000
0.010 - 0.020
0.05 - 0.10
2.0
9,000 - 15,000
800 - 1200
0.015 - 0.030
0.10 - 0.20
3.0
6,000 - 10,000
900 - 1500
0.025 - 0.045
0.15 - 0.30
Attention: For Long Neck tools with an Effective Length > 10x Diameter, please reduce RPM and Feed by 20-40% to prevent vibration.

Promotion Policy

We value our partnerships and offer the following incentives to support your business:
  1. Free Sample: Free sample can be provided, if clients agree to pay for shipping cost.
  1. First Order Coupon: New clients can enjoy a **USD
    50discountcoupon∗∗forthefirstorder,ifthetotalorderamountismorethanUSD50 discount coupon** for the first order, if the total order amount is more than USD
    
    500.
  1. Big Order Discount: Clients can enjoy 2%~5% discount, if the total order amount is more than USD $5,000.

Client Benefits

  • Factory Direct: Eliminate middlemen. Get the most competitive price directly from our manufacturing facility.
  • Huge Inventory: As shown in the specifications, we keep a vast stock of various neck lengths (Effective Lengths) ready for immediate shipment.
  • Quality Assurance: 100% inspection before shipping. We use high-quality carbide rods to ensure consistent performance.
  • Technical Support: Our expert team is available to suggest optimal cutting parameters for your specific CNC machines.

FAQ

Q1: What is the main advantage of a Corner Radius over a Square End Mill? A1: The corner radius (R0.1/R0.2) strengthens the cutting tip, significantly reducing the risk of chipping, especially in harder steels. It also provides a smoother finish on mold floors compared to sharp corners.
Q2: How do I choose the correct Effective Length (Neck Length)? A2: Always choose the shortest effective length that can clear your feature depth. Shorter necks are more rigid and allow for faster cutting speeds.
Q3: Can these tools machine hardened steel above HRC 55? A3: While these are optimized for general steel and alloy steel, we have specific coating upgrades available for High Hardness Steel (HRC 55-65). Please contact us for details.
Q4: Do you offer custom sizes not listed in the table? A4: Yes! As a manufacturer, we can produce custom dimensions (different neck lengths or radii) with a quick turnaround time.