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ProductsHRC55 Solid Carbide 4 Flute End Mill - Long Cutting Length for Steel (Micro Dia. 1mm-4mm)
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HRC55 Solid Carbide 4 Flute End Mill - Long Cutting Length for Steel (Micro Dia. 1mm-4mm)

Maximize precision in hardened steel with our HRC55 4 Flute Tungsten Carbide End Mills. Featuring long flutes for deep cutting (1mm-4mm Dia). Factory direct, ready to ship, and high wear resistance. Get a free sample today!

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Product Function

Designed for precision and durability, our HRC55 Tungsten Carbide 4 Flute End Mills are engineered specifically for machining hardened steels (up to HRC 55). The "Long Length" design allows for deep slotting and profiling in molds and mechanical parts where standard flute lengths fall short. This tool serves as a critical solution for CNC operations requiring deep reach without sacrificing rigidity, ensuring distinct geometric accuracy in semi-finishing and finishing processes.

Product Features

  • Premium Material: Manufactured from Ultra-fine Micro Grain Tungsten Carbide, offering exceptional wear resistance and toughness.
  • High Hardness Performance: Optimized for Carbon Steel, Alloy Steel, and Hardened Steel up to HRC55.
  • 4-Flute Geometry: Provides excellent surface finish and chip evacuation balance, ideal for peripheral milling and finishing operations.
  • Long Flute Design: Extended Length of Cut (L2) enables machining of deep pockets and tall walls in a single pass or fewer step-downs.
  • Precision Tolerance: Shank diameter (h6) and cutter diameter are ground to tight tolerances for high-speed CNC applications.
  • Protective Coating: Advanced AlTiN/TiSiN coating improves thermal stability and extends tool life under high heat.

Specifications

Stock Availability: Ready to Ship Material: Tungsten Carbide | Flutes: 4 | Helix Angle: 35° | Hardness: HRC55
D1 Cutter Diameter (mm)
L2 Length of Cut (mm)
D2 Shank Diameter (mm)
L1 Over All Length (mm)
1.0
4 / 5 / 6 / 7 / 8 / 10
4
50
1.2
4 / 5 / 6 / 8 / 10
4
50
1.3
5 / 6 / 8
4
50
1.4
6 / 8 / 10
4
50
1.5
5 / 6 / 7 / 8 / 10 / 12
4
50
1.6
6 / 8 / 10
4
50
1.7
6
4
50
1.8
6 / 8 / 10
4
50
2.0
8 / 10 / 12
4
50
2.5
10 / 12 / 14
4
50
3.0
10 / 12 / 14 / 15 / 16
4
50
4.0
12 / 15 / 16 / 20
4
50
1R0.1 (Corner Radius)
4
6
50
1R0.2 (Corner Radius)
4
6
50

RPM/Feed Reference (Recommended Parameters)

Note: Parameters are for reference only. Adjust based on machine rigidity, cooling, and specific material.
Cutter Dia (mm)
RPM (min-1)
Feed Rate (mm/min)
aP (Axial Depth)
aE (Radial Depth)
1.0
12,000 - 20,000
200 - 450
0.05D
0.1D
1.5
10,000 - 16,000
250 - 550
0.1D
0.15D
2.0
8,000 - 14,000
300 - 650
0.15D
0.2D
3.0
6,000 - 10,000
400 - 800
0.2D
0.2D
4.0
4,800 - 8,000
500 - 1000
0.3D
0.3D

Promotion Policy

To support our partners and new clients, we offer the following exclusive policies:
  1. Free sample: Free sample can be provided, if clients agree to pay for shipping cost.
  1. First order coupon: New clients can enjoy USD50 discount coupon for first order, if the total order amount is more than USD500.
  1. Big order discount: Clients can enjoy 2%~5% discount, if the total order amount is more than USD5000.

Client Benefits

  • Factory Direct Pricing: Eliminate middlemen. Get competitive pricing directly from the manufacturer.
  • Consistent Quality: Strict QC inspection for every batch ensures your CNC machines run without interruption.
  • Huge Inventory: As shown in the specifications, we keep specific long-flute micro sizes in stock for immediate dispatch.
  • Technical Support: Our team of engineers is available to suggest the best cutting parameters for your specific steel grade.

FAQ

Q1: Can these end mills cut stainless steel? A1: While these are optimized for Hardened Steel (HRC55), they can cut stainless steel. However, for mass production of Stainless Steel, we recommend our specialized series designed for sticky materials to prevent built-up edge.
Q2: What is the coating on these tools? A2: Standard coating is AlTiN (Aluminum Titanium Nitride) or TiSiN, which provides high heat resistance, crucial for cutting hard metals.
Q3: Do you offer customization for non-standard lengths? A3: Yes! While the list above is our in-stock standard inventory, we have full OEM/ODM capabilities. If you need a specific Cut Length (L2) or Overall Length (L1), please contact our sales team.
Q4: What is the shipping time for the items listed? A4: Since these are in-stock items, we typically ship within 24-48 hours after payment confirmation.
Q5: How do I claim the Free Sample? A5: Simply click the "Contact Us" button or send an inquiry stating your company details and shipping address. We will calculate the shipping cost for you to confirm.