Corner Radius End Mill

HNCarbide offers a dedicated range of corner radius end mill tools for high-speed, high-precision milling of steel, stainless steel, aluminum and cast iron. Compared with a square end, a corner radius end mill cutter helps reduce chipping at the edges, improves tool life and gives a cleaner surface in 3D profiles and contour machining.

Using advanced CNC grinding and strict ISO-based quality control, each carbide corner radius end mill features accurate geometry, stable cutting and reliable chip evacuation in daily production. We supply practical corner radius end mill sizes from small diameters for fine details and cavities, such as a 1/8 corner radius end mill, to larger tools for efficient roughing. You can choose 2 flutes end mill corner radius designs for aluminum and other non-ferrous materials, or 4 flute corner radius end mill options for alloy steels and tougher applications.

Whether you are optimizing corner radius vs square end mill performance on a new program or standardizing tools across multiple machines, HNCarbide supports you with consistent quality, fast delivery and flexible options for special radii and shanks.

Our Corner 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.

Corner Radius End Mill Product Details

HRC55 4 Flute Corner Radius End Mill for Steel

This HRC55 4 flute corner radius end mill is specially designed for efficient machining of alloy and stainless steel parts. Made from solid carbide, this carbide corner radius end mill offers a strong cutting edge and optimized chip flow for stable performance in side milling, profiling and shallow slots. The reinforced end mill corner radius reduces edge chipping compared with a square end, extending tool life and improving surface finish on critical features. As a versatile 4 flute corner radius end mill for steel and common tool steels, it is ideal for mould components, mechanical parts and general machining where reliability, accuracy and consistent quality are required.

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.

Corner Radius End Mill Dimensions & Technical Drawings

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

FAQ

What is a corner radius end mill?

A corner radius end mill is a cutting tool with a rounded corner instead of a sharp 90° edge. This small radius reduces chipping at the edge, improves tool life and helps achieve a smoother surface finish in profiling and contour milling.

When should I choose a corner radius end mill vs square end mill?

When you compare corner radius vs square end mill, the corner radius type is better for parts with 3D profiles, shoulders and pockets where corners are stressed or prone to chipping. Square end mills are suitable for sharp internal corners, but they usually wear faster at the edge than a corner radius design.

Which materials can HNCarbide corner radius end mills machine?

HNCarbide carbide corner radius end mill tools are designed for steel, stainless steel, cast iron and aluminum. We offer dedicated geometries such as corner radius end mill for aluminum and end mill corner radius for stainless steel to match cutting conditions for different materials.

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 Corner Radius End Mill for Stainless Steel

This HRC60 4 flute corner radius end mill is engineered specifically for difficult stainless steel machining where stability and tool life are critical. Made from fine-grain solid carbide, this stainless steel corner radius end mill combines a tough substrate with a wear-resistant coating to handle high cutting temperatures and interrupted cuts. The optimized end mill corner radius for stainless steel reduces edge chipping and notch wear compared with a square end, while the 4 flute corner radius end mill geometry provides smooth cutting, low vibration and a clean surface finish in side milling and profiling. Ideal for austenitic and martensitic stainless steels, it is well suited to precision components, mould inserts and medical or food-grade parts where consistent dimensional accuracy and reliable performance are required.