HRC70 Metal Ceramics Corner Radius End Mills

HRC70 Metal Ceramics Corner Radius End Mills 4 Flutes

Coating: NO

Grain Size: Metal Ceramics

HRC: 70

Helix Angle: 40

Flutes: 4             

Application:   HRC＜70 Carbon steel, Cast Iron steel, Die steel, Alloy steel, Tool steel, Welding auxiliary steel......

Non-standard production & OEM is welcomed anytime.

Carbide Corner Radius End Mills: RoundedCorner Transitions + Flat Panel Machining, Multi-functional and More Efficient

In mold manufacturing, machining,automotive parts production, and precision hardware processing, many workpiecesrequire not only smooth surfaces but also precise rounded cornertransitions—whether it's the rounded corners of mold cavities, the chamferingof parts' edges, or the junctions between flat and curved surfaces, theaccuracy of rounded corner machining directly affects the workpiece's assemblyperformance, service life, and appearance. Traditional machining requiresseparate operations using face mills and ball end mills, which is cumbersome,inefficient, and prone to problems such as uneven transitions between roundedcorners and flat surfaces, and dimensional deviations. Carbide round nose endmills (also known as bullnose end mills) combine the smooth cutting advantagesof face mills with the rounded transition advantages of ball end mills,handling multiple processes such as flat surfaces, rounded corners, and stepsin one machine. This makes them a highly efficient "all-rounder,"completely simplifying the machining process and improving machining quality.

Key Design Highlights: Perfect BalanceBetween Rounded Corners and Flat Panels

The core advantage of the carbide roundnose end mill lies in its unique integrated "flat bottom + rounded cuttingedge" design—the front end of the cutter head features a precise roundedcutting edge (corner radius R can be customized), while the rear end has a flatcutting edge. It can perform rough and finish milling of planes and steps likea face milling cutter, and also achieve rounded corner transitions and curvedsurface connections like a ball end mill. This eliminates the need for frequenttool changes, significantly shortening machining steps and improving productionefficiency.

Compared to step-by-step machining, theintegrated design advantages of the round nose end mill are particularlyevident: smooth transition between rounded corners and flat panels, withouttool marks or steps, avoiding subsequent grinding and correction; the roundedcutting edge disperses cutting forces, reducing tool wear and the risk ofchipping, especially suitable for high-strength, high-feed machining; precisecorner radius control (error ≤ 0.01mm) perfectly matches workpiece designrequirements, ensuring assembly accuracy and avoiding workpiece jamming andwear problems caused by corner size deviations.

Powered by robust materials, durability andprecision are both top-notch.

Polymer Corner Radius end mills need tohandle both continuous cutting of planes and localized high-pressure cutting ofrounded corners, placing higher demands on the material, rigidity, and wearresistance of the tool. Our carbide round nose end mills utilize an ultra-finegrain tungsten carbide matrix, sintered through precision powder metallurgy,They possess high rigidity and excellent compressive strength, capable ofwithstanding the dual loads of high-speed and high-pressure cutting, and areresistant to deformation and chipping.

The cutter head surface is coated with anAlCrN/TiAlN nano-coating, which not only further enhances hardness and wearresistance but also effectively blocks cutting temperatures of 800-1000℃,reducing cutting friction, minimizing tool sticking and chip buildup, andextending tool life. Compared to ordinary high-speed steel round nose endmills, their core performance represents a qualitative leap:

- Multi-functional, doubling efficiency:Simultaneously completes plane, rounded corner, and step machining without toolchanges, simplifying the machining process by over 30%, significantlyshortening the production cycle, and adapting to mass production needs.

- Precise and controllable corner radiusaccuracy: The rounded cutting edge is ground at the micron level, with a cornerradius R ranging from 0.1-10mm, customizable to meet specific needs. Minimaldimensional errors result in smooth, seamless transitions, eliminating the needfor subsequent adjustments.

- Outstanding durability: The basematerial's wear resistance is 6-12 times that of high-speed steel round noseend mills. The coating has strong adhesion, maintaining a sharp cutting edgeeven during long-term continuous cutting. This significantly reduces tool changefrequency and saves over 50% on consumable costs.

- Wide material compatibility: Stablemachining of various materials including hardened steel, die steel, stainlesssteel, aluminum alloys, titanium alloys, and cast iron. Whether for roughmilling, semi-finish milling, or finish milling, it consistently delivershigh-quality results.

Meticulous Detail Optimization for AllMachining Needs

To meet the machining requirements ofdifferent industries and working conditions, we have refined the details tomake our carbide round nose end mills adaptable to more complex scenarios:

1. Optimized Helical Flutes Design:Utilizing a 35°-45° helix angle, the chip removal channel is wide and smooth,allowing for rapid chip removal during cutting without clogging or scratchingthe workpiece surface. This is especially suitable for machining deep steps andhigh feed rates.

2. Comprehensive Coverage with MultipleTooth Counts and Specifications: Available in 2-flute, 3-flute, and 4-fluteoptions. 2-flute versions are suitable for rough milling and scenarios withhigh chip removal, while 4-flute versions are suitable for finish milling andhigh-speed cutting. Diameter range: 1mm-20 mm; Corner radius: R0.1-R10mm;Cutting length: Standard and extended cutting lengths are available, and customspecifications are also supported to meet personalized machining needs.

3. Precision Edge Processing: Micron-leveledge grinding and micro-passivation treatment ensure a sharp and resilientcutting edge, guaranteeing cutting efficiency while preventing chipping androlling during corner machining, and minimizing scratches on the workpiecesurface.

4. Upgraded Tool Holder: High-precisionground tool holder with high concentricity and rigidity, eliminating vibrationand runout during high-speed cutting, ensuring flatness and consistent cornerradius. Compatible with various CNC machining centers and milling machines, andeasy to install.

Core Application Scenarios, EmpoweringEfficient Machining Across Multiple Industries

With its core advantages of"multi-purpose, precise, efficient, durable, and worry-free," carbideround nose end mills are widely used in various high-end manufacturing fields,becoming the preferred tool for multi-process machining:

- Mold Manufacturing: Machining of moldtemplates and bases, as well as corner radius transitions and step machining ofmold cavities and cores, ensuring precise corner radius, extending mold life,and improving mold forming quality.

- Automotive Parts Machining: Machining offlat surfaces, fillets, and steps for engine blocks, transmission housings, andchassis components; suitable for high-strength, high-volume production,ensuring component assembly precision.

- Precision Hardware Machining: Chamferingand flat surface machining of precision hardware parts, fasteners, andconnectors; achieving smooth workpiece edges and corners, avoiding sharp burrs,and improving product quality and safety.

- Mechanical Parts Machining: Machining offlat surfaces, steps, and fillets for shafts, gears, flanges, and other parts;simplifying machining processes and improving component precision and assemblyperformance.

- New Energy Equipment Machining: Machiningof flat surfaces and fillets for new energy vehicle battery trays and motorhousings; suitable for cutting high-hardness materials, ensuring componentstructural stability.