Radius End Mill

At HNCarbide, we provide a versatile range of corner radius end mill tools designed for high-speed, high-precision milling of materials such as steel, stainless steel, aluminum, and cast iron. These tools are more durable than square end mills, reducing edge chipping and delivering smoother finishes, especially in 3D profiling and contour machining.

Each of our carbide corner radius end mill tools is crafted with advanced CNC grinding and follows strict ISO-based quality control standards. This ensures that you get tools with accurate geometry, stable cutting performance, and effective chip evacuation. We offer various sizes, from small 1/8 corner radius end mills for fine details to larger ones for heavy-duty roughing, as well as both 2-flute designs for softer materials and 4-flute options for tougher metals.

Whether you’re looking to optimize performance with corner radius end mills or standardize tooling across your production line, HNCarbide delivers consistent quality, fast shipping, and tailored solutions to meet your specific needs.

Our Radius End Mill 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.

Radius End Mill Product Details

HRC55 4 Flute Radius End Mill for Steel

The HRC55 4 Flute Corner Radius End Mill for Steel is a high-performance tool designed specifically for steel machining. Featuring a corner radius end mill design, it helps reduce chipping and extend tool life, offering smoother finishes and more reliable results in 3D profiling and contouring. The 4-flute design ensures superior chip removal, enhancing cutting stability and efficiency, particularly in tougher materials.

Available in a range of sizes, including options like carbide corner radius end mill and stainless steel corner radius end mill, this tool delivers optimal performance across various applications. Whether you’re working with alloy steels or aluminum, the HRC55 4 flute corner radius end mill guarantees precision and consistency, making it a versatile choice for both HRC45 corner radius end mill tasks and more demanding jobs

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.

Radius End Mill Dimensions & Technical Drawings

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

FAQ

What is a radius end mill used for?

A radius end mill is used to create rounded edges and smooth curves in materials like steel, stainless steel, aluminum, and cast iron. It’s ideal for 3D profiling, contour machining, and tasks requiring a corner radius end mill cutter design that reduces edge chipping and enhances tool life.

Can I use the radius end mill for aluminum machining?

Yes, the corner radius end mill for aluminum is designed specifically for use with soft metals like aluminum. The 2 flute corner radius end mill design is especially effective for high-speed cutting in non-ferrous materials, ensuring clean cuts and high-quality finishes.

How can I choose the right size of radius end mill for my application?

The size of the radius end mill depends on the detail and material you’re working with. For fine, detailed work, tools like the 1/8 corner radius end mill are ideal. For roughing tasks or larger cuts, we offer larger sizes to provide the necessary strength and efficiency.

Do you offer corner radius end mills for hardened steel?

Yes, HNCarbide supplies hrc45 corner radius end mill tools for general steels and hrc65 corner radius end mill options for hardened and high-hardness materials. These grades are optimized for wear resistance, heat resistance and stable performance at higher cutting speeds.

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 Radius End Mill for Stainless Steel

The HRC60 4 Flute Radius End Mill for Stainless Steel is designed for precision milling of stainless steel and other hard metals. With a hardness rating of HRC60, this carbide radius end mill provides excellent wear resistance and durability, making it perfect for tough cutting tasks. The 4-flute design improves chip removal, providing stable cutting performance even in demanding operations.

This tool’s corner radius end mill cutter design reduces edge chipping, extends tool life, and delivers cleaner, smoother finishes, especially when machining complex 3D profiles and contours. Available in various sizes, including options like the 1/8 corner radius end mill and larger diameters for roughing, this tool excels in both fine-detail and heavy-duty applications.

Whether you’re working with stainless steel or other alloy steels, the HRC60 4 flute radius end mill guarantees high performance and reliability for a variety of applications, ensuring you get the job done with precision every time.