HRC70 Square Carbide End Mill for Hardened Steel | China Factory Direct

🎯 High-Performance Milling for Extreme Hardness (Up to 70 HRC)

Our HRC70 Square Carbide End Millis engineered for the most demanding CNC milling operations. As a specialized carbide tool factory in China, we developed this series to excel in side milling, slotting, and profile milling of materials that break standard tools.

It is the ultimate solution for machinists dealing with hardened die steel, heat-treated components, and aerospace superalloys, ensuring exceptional dimensional stability and significantly longer tool life in high-speed machining (HSM).

💎 Key Features & Technical Advantages

Superior Hardness (HRC70):Made from ultra-fine micro-grain tungsten carbide substrate (0.2μm), offering exceptional wear resistance and the rigidity needed for hardened steel.

Nano-Silicon Blue Coating (AlTiSiN):Features a proprietary high-heat resistant coating that reduces friction and prevents Built-Up Edge (BUE). This is crucial for machining sticky materials like Titanium and Stainless Steel.

Wide Material Applicability:Perfectly suited for:
Hardened Steel:HRC 50-70 (Die Steel, Mold Steel)
Superalloys:Titanium Alloys, Inconel
Stainless Steel:304, 316, and Duplex

Vibration Absorption:The optimized flute geometry minimizes chatter, ensuring a superior surface finish even during heavy-duty cuts.

Extra Long Reach Options:We offer an extra-long series (up to 150mm)specifically designed for deep cavity machining where stability is paramount.

📊 Technical Specifications (Standard & Extra Long)

We keep a large stock of standard and extended lengths for immediate global shipping.

Cutter Dia (D)	Shank Dia (d)	Flute Length (L2)	Overall Length (L1)	Series Type
1.0 mm	4 mm	3 mm	50 mm	Standard
1.5 mm	4 mm	3 mm	50 mm	Standard
2.0 mm	4 mm	4 mm	50 mm	Standard
3.0 mm	4 mm	6 mm	50 mm	Standard
4.0 mm	4 mm	8 mm	50 mm	Standard
4.0 mm	4 mm	15 mm	75 mm	Long Reach
4.0 mm	4 mm	20 mm	100 mm	Long Reach
6.0 mm	6 mm	15 mm	50 mm	Standard
6.0 mm	6 mm	24 mm	75 mm	Long Reach
6.0 mm	6 mm	30 mm	100 mm	Long Reach
6.0 mm	6 mm	45 mm	150 mm	Extra Long
8.0 mm	8 mm	20 mm	60 mm	Standard
8.0 mm	8 mm	35 mm	100 mm	Long Reach
8.0 mm	8 mm	50 mm	150 mm	Extra Long
10.0 mm	10 mm	25 mm	75 mm	Standard
10.0 mm	10 mm	40 mm	100 mm	Long Reach
10.0 mm	10 mm	60 mm	150 mm	Extra Long
12.0 mm	12 mm	30 mm	75 mm	Standard
12.0 mm	12 mm	60 mm	150 mm	Extra Long
16.0 mm	16 mm	70 mm	150 mm	Extra Long
20.0 mm	20 mm	70 mm	150 mm	Extra Long

📈 Recommended Cutting Parameters (Side Milling)

Note: Adjust parameters based on machine rigidity. Air cooling or oil mist is highly recommended for HRC60+ materials.

Material	Hardness	Tool Dia (mm)	RPM (r/min)	Feed (mm/min)
Hardened Steel	HRC 50-60	6	2800 - 4000	400 - 600
Hardened Steel	HRC 60-70	10	1800 - 2500	450 - 700
Titanium Alloy	-	6	2500 - 3500	150 - 250
Stainless Steel	300 Series	10	2000 - 2800	350 - 600

🏭 Why Source from CZQT Tools Factory?

Factory Direct Pricing:Eliminate middlemen and get the most competitive wholesale pricing for HRC70 high-end tools.

Quality Assurance:100% inspection before shipment using advanced Zoller measuring equipmentto ensure h6 shank tolerance.

B2B Promotion Policy:
Free Samples:Available for industrial testing (shipping cost excluded).
First Order Coupon:USD $50 OFFfor your first order over $500.
Bulk Discount:2% - 5% OFFfor orders exceeding USD $5,000.

Technical Support:Our engineering team provides optimized tooling solutions for your specific CNC projects.

❓ FAQ: HRC70 Carbide Milling

Q1: Can this HRC70 end mill cut Aluminum?

A: While it is hard enough, we do not recommend it. The AlTiSiN coating is designed for heat resistance in hard metals. For Aluminum, we recommend our DLC-coated or Uncoated seriesto prevent chip welding.

Q2: What is the advantage of the 150mm Extra Long series?

A: Many suppliers only offer standard lengths. Our 150mm series is specifically reinforced to handle deep cavity millingin mold steel without excessive vibration or breakage.

Q3: Do you offer OEM/ODM for custom sizes?

A: Yes. As a direct factory, we can manufacture custom tools based on your drawings, including specific neck lengths, corner radii, or taper angles.

Q4: How fast is the shipping?

A: All sizes in the specification table are in stock. Orders typically ship via DHL/FedEx/UPS within 24-48 hours.

Looking for ball nose? Check our [Long Neck Micro Ball Nose for Aluminum]