End Mill Radius

At HNCarbide, we specialize in end mill radius solutions designed for high-speed, high-precision milling of steel, stainless steel, aluminum, and cast iron. Compared with traditional square end mills, our end mill radius cutter range offers stronger edges, reduced chipping, and smoother surface finishes, especially in 3D profiling and contour machining.

Each carbide end mill radius tool is produced on advanced CNC grinding machines and inspected under strict ISO-based quality control. This guarantees accurate geometry, stable cutting performance, and reliable chip evacuation. We supply a wide selection of standard end mill radius options, from small 1/8 tools for fine detail work to larger sizes for heavy-duty roughing, as well as 2-flute designs for softer materials and 4-flute versions for tougher metals.

Whether you want to improve tool life with an optimized end mill radius or standardize tooling across your production line, HNCarbide offers consistent quality, fast delivery, and flexible solutions tailored to your machining needs

Our End Mill Radius Product Range

HN55-C4 Read More HN60-VCS4 Read More GM-C4 Read More HN65-C4 Read More

Simplify Complex Contours!

Leveraging advanced CNC grinding technology and strict ISO-compliant quality control, we ensure stable cutting performance, long tool life, and consistent batch-to-batch accuracy.

End Mill Radius Product Details

HRC55 4 Flute End Mill Radius for Steel

The HRC55 4 Flute End Mill Radius for Steel is a high-performance tool engineered for reliable steel machining in both roughing and finishing. With its reinforced corner end mill radius design, it significantly reduces edge chipping and extends tool life, delivering smoother finishes and more stable performance in 3D profiling, contour milling, and general side cutting. The 4-flute geometry offers a good balance of productivity and control, ensuring stable cutting forces and efficient chip evacuation, even at higher feed rates.

Designed as a versatile end mill radius cutter, it is suitable for alloy steel, carbon steel, pre-hardened steel, and related materials. Multiple standard end mill radius sizes are available so you can match the tool to different operations, from semi-finishing to light roughing. Whether you are upgrading from a square end mill or standardizing tooling across your CNC lines, this HRC55 4 flute end mill radius provides consistent accuracy, dependable wear resistance, and a cost-effective solution for daily steel machining tasks.

Order Number:

HN55-C4

In-stock products, fast delivery.

RODS & PREFORMS

Grade HN40 is made from submicron WC powder, some speclal additlves added to optimize theproperties with good combination of hardness and toughness.

Its suitable for making drills and miling tools for machining stainless steel, tool steel and heat-resistingalloys.

Grade	Cobalt content %	Grain size	Density g/cm³	Hardness HRA	Hardness HV30	MPa Transverse rupture strength	MPa ·m1/2 Fracture toughness MPa ·m1/2
HN40	10	0.8	14.45	91.8	1,580	3,600	11.8

COATING

Scientific name	Composition	Physical properties	Features	Typical applications
TiSiN	Ti (titanium): main element, forms TiN nanocrystalline phase. Si (silicon): usually 6–10%, forms amorphous Si₃N₄ phase, refines grains and increases hardness. N (nitrogen): combines with Ti and Si to form a composite structure.	Colour: TiSiN coatings usually appear bronze or dark grey-bronze; exact colour depends on Si content, deposition process (such as PVD) and thickness (1–4 μm). Hardness: 34–42 GPa (≈3400–4200 HV). Friction coefficient: 0.3–0.6 (against steel). Temperature resistance: 1000–1200°C (oxidation resistance). Coating thickness: 1–5 μm (typically 2–3 μm). Deposition temperature: 200–400°C (suitable for carbide tools).	Ultra-high hardness: amorphous Si₃N₄ phase suppresses dislocation movement, giving much higher hardness than TiN (~23 GPa) and TiAlN (~35 GPa). High-temperature stability: suitable for dry cutting and high-speed machining (e.g. quenched steels HRC 60+). Anti-adhesion: reduces built-up edge when machining aluminium alloys, stainless steels and other sticky materials.	Tool coatings: drills, mills (especially suitable for PCB routers, tool life increased by 2–3 times). High-speed cutting of quenched steels, titanium alloys and high-nickel alloys. Mould strengthening: die-casting moulds and stamping dies, improving wear resistance. Industrial parts: piston rings and other high-temperature wear parts.

End Mill Radius Dimensions & Technical Drawings

Our End Mill Radius drawings clearly show key End Mill Radius dimensions such as diameter, radius, flute length and overall length. This helps you confirm the right End Mill Radius sizes for your CNC setup and machining depth before ordering.

FAQ

Why use an end mill radius instead of a square end mill?

A corner end mill radius cutter reduces edge chipping and stress concentration at the corner, which improves tool life and produces smoother surface finishes, especially in contour milling and side milling of hardened materials.

Which materials can this tool machine effectively?

The HRC65 4 flute end mill radius is mainly optimized for hardened tool steel, die steel, and high-hardness alloys up to around HRC65. It can also be used on pre-hardened steels where long tool life and precision are required.

Can this tool replace a ball nose end mill in 3D machining?

For general contouring with small corner fillets, a corner end mill radius can sometimes replace a ball nose end mill radius and offer higher productivity. However, for deep 3D surfaces and complex freeform shapes, a dedicated ball nose end mill radius is still recommended.

Do you offer non-standard / customized cutting tools?

Yes. We can produce non-standard tools according to your drawings, samples or machining requirements (material, coating, size, tolerance and application). Our engineers will evaluate and provide a quotation and lead time.

Can I get free samples?

For serious buyers and distributors, we can offer free standard samples if in stock. Usually you only need to cover the freight cost. For customized tools, a sample fee may apply, which can be refunded or deducted in bulk orders.

Do you support OEM and ODM service?

Yes.

OEM:Your logo and brand on tools, labels and boxes, with agreed MOQ.
ODM:We work with you to design or optimize tools for your market. NDAs can be signed to protect your projects and drawings.

Do you have a distributor / dealer support program? What support can I get?

Yes, for qualified distributors we provide a complete support package:

1.Market protection

Regional or customer protection based on sales targets, avoiding price wars among our partners.

2.Marketing support

Catalogs, brochures, product photos, technical data sheets, online materials.

For key partners, joint promotion, exhibitions and digital marketing support.

3.Stable supply

Safety stock for fast-moving items and forecast-based production.

Priority production and regular shipments to reduce stock-out risk.

4.Worry-free after-sales

Clear quality warranty policy, quick response to claims.

Replacement, credit or other solutions after confirmation of issues.

5.Technical support

Tool selection and cutting parameter advice.

Problem analysis for different materials and machines.

Online training, documents, and when possible, on-site support for key accounts.

HRC60 4 Flute End Mill Radius for Stainless Steel

The HRC60 4 Flute End Mill Radius for Stainless Steel is designed for high-precision machining of austenitic and martensitic stainless steels where wear resistance and surface finish are critical. With a reinforced corner end mill radius design, it offers better edge strength than square end mills, reducing micro-chipping and tool breakage in interrupted cuts, side milling, and light slotting. The 4-flute geometry provides stable cutting and smooth chip evacuation, helping you maintain consistent dimensional accuracy at higher speeds and feeds.

Manufactured from ultra-fine grain carbide and heat-treated to HRC60, this end mill radius cutter delivers excellent hardness and oxidation resistance under both dry and wet cutting conditions. A range of standard end mill radius sizes is available to match different depths of cut and finishing requirements, making it suitable for stainless steel components, food-processing parts, medical hardware, and precision fittings. It is an ideal choice when you need a durable, long-life end mill radius dedicated to stainless steel machining.