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55HRC 2 flute lollipop end mill for steel is specially developed for stable machining of alloy and pre-hardened steels up to 55HRC, where reliable 3D contouring and undercut milling are required. Using fine-grain carbide and a tough 55HRC-capable design, this lollipop carbide end mill provides a strong cutting edge with good wear resistance, helping to control chipping and extend tool life in continuous production.
The 2-flute geometry and polished flute surfaces support smooth chip evacuation when machining slots, pockets and deep cavities, reducing built-up edge and heat in steel cutting. With its spherical cutting end and relieved neck, this lollipop end mill can safely reach behind walls, machine fillets, blend surfaces and clean up hidden corners that standard tools cannot access. It is well-suited for mold and die work, automotive and general engineering parts where you need a compact lollipop end mill solution for precise finishing and semi-finishing on steel components.
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 |
| 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. |
A lollipop end mill is a ball-shaped tool with a relieved neck, designed to machine undercuts, fillets and hard-to-reach areas. It is ideal for 3D finishing, deburring and blending surfaces on multi-axis machines.
HNCarbide lollipop end mill tools can be used on alloy steel, stainless steel, hardened steel within the rated hardness, aluminum and cast iron. Different carbide grades and coatings are available to match your specific material and cutting conditions.
For aluminum and other non-ferrous materials, a 2 flute lollipop end mill gives more space for chip evacuation. For steel and stainless steel, higher flute counts can provide smoother cutting and longer tool life when the setup is rigid.
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.
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.
Yes.
Regional or customer protection based on sales targets, avoiding price wars among our partners.
Catalogs, brochures, product photos, technical data sheets, online materials.
For key partners, joint promotion, exhibitions and digital marketing support.
Safety stock for fast-moving items and forecast-based production.
Priority production and regular shipments to reduce stock-out risk.
Clear quality warranty policy, quick response to claims.
Replacement, credit or other solutions after confirmation of issues.
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.
HNCarbide lollipop end mill tools are designed to solve typical “hard-to-reach” machining areas in modern workshops. With a spherical cutting end and slim neck, they make it easy to finish transitions between walls and floors, clean up small radii and remove stock in undercuts that standard end mills cannot touch.
In mold and die, aerospace, medical and precision parts, the lollipop end mill helps you shorten hand-polishing time, improve consistency between cavities and reduce the number of special form tools required. Whether you are deburring sharp edges, blending 3D surfaces or finishing slots from the back side, an HNCarbide lollipop end mill cutter provides a practical solution for flexible 5-axis and multi-axis machining.
To support reliable daily production, every HNCarbide lollipop carbide end mill is made from micrograin carbide and finished in-house on precise CNC grinders. Controlled radius tolerance, balanced cutting edges and strict runout inspection help keep vibration low and extend tool life, even when the tool is working deep inside cavities.
Special neck relief and optimized flute layout allow chips to escape smoothly and reduce the risk of rubbing on steep walls. Coating options are available for steel, stainless steel and aluminum, so you can choose one lollipop end mill family that covers different materials while keeping programming and tool management simple across multiple machines.
We Are Commited To Providing High-Quality, Customized solutions At An Affordable price While Also Prioritizing sustainability And ExcellentCustomer Service, These Qualities Make Us A Great choice For Your Lollipop End Mill Needs
We Only Use unground tungsten carbide rods with HlP sintering and100% virgin material. Our grade includes lsO K05 to K40, frommachining carbon steel to aluminium, non-ferrous metals andtitanium or we develop grade for your applications.
As a HNCarbide customer, you can enjoy five-axis high-precisiongrinding machines from Australia’s ANCA or Germany’s Walter. Themodern workshop with constant temperature and humidity ensuresthe accuracy of each Lollipop End Mill.
Each of your tungsten Lollipop End Mill will be sandblasted to effectively remove burrs and improve the finish.
All HNCarbide’s Lollipop End Mill will be monitored on WALTER HELICHEEK andZOLLER GENlUS 3 to ensure that every dimension is qualified. We arecommitted to controlling the tolerance within 3 UM.
At HNCarbide, every shipment is meticulously packaged to ensure your tools arrive intact.
Each HNCarbide’s Lollipop End Mill is individually placed in a shock-resistant protective case, labeled with complete specifications, and sealed in moisture-proof packaging material before being boxed.
Large-volume orders are reinforced with double-wall cardboard boxes or wooden crates to maximize safety during international shipping.
We collaborate with reliable logistics partners to ensure goods are delivered quickly and securely to their destination via air freight, sea freight, or express courier.
A lollipop end mill is a ball-shaped tool with a relieved neck, designed to machine undercuts, fillets and hard-to-reach areas. It is ideal for 3D finishing, deburring and blending surfaces on multi-axis machines.
HNCarbide lollipop end mill tools can be used on alloy steel, stainless steel, hardened steel within the rated hardness, aluminum and cast iron. Different carbide grades and coatings are available to match your specific material and cutting conditions.
For aluminum and other non-ferrous materials, a 2 flute lollipop end mill gives more space for chip evacuation. For steel and stainless steel, higher flute counts can provide smoother cutting and longer tool life when the setup is rigid.
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.
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.
Yes.
Regional or customer protection based on sales targets, avoiding price wars among our partners.
Catalogs, brochures, product photos, technical data sheets, online materials.
For key partners, joint promotion, exhibitions and digital marketing support.
Safety stock for fast-moving items and forecast-based production.
Priority production and regular shipments to reduce stock-out risk.
Clear quality warranty policy, quick response to claims.
Replacement, credit or other solutions after confirmation of issues.
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.
Before you go, please note that we offer the most up-to-date industry research reports and the most comprehensive product catalogs, so please contact us if you are interested!
Before you go, please note that we offer the most up-to-date industry research reports and the most comprehensive product catalogs, so please contact us if you are interested!
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