Tapered ball end mill
The EMA260 series is a professional-grade end mill specifically designed for machining NPT tapered pipe threads and boreholes in American standard applications. It features a 2-flute, 30° helix angle design with an uncoated, high-gloss cutting edge. Powered by a high-toughness, ultra-fine grain cemented carbide substrate, it offers precise tapered thread forming capabilities, high feed efficiency, and high-gloss finish. It is ideal for machining bevels, complex contours, and corner clearing in various materials including steel, stainless steel, aluminum alloys, and mold steel (HRC55 and below). Its excellent chip removal efficiency and high-gloss finish make it ideal for machining NPT tapered pipe threads, tapered holes, and sealing surfaces in aluminum alloys, steel, and stainless steel, providing reliable assurance for your threaded sealing connections.
| Part number | EMA260060T |
|---|---|
| Material | Ultrafine Tungsten Carbide Alloy |
| Product Name | 2-Flute Tapered Ball End Mill – 38º |
| OEM / ODM | Made to your samples or drawings |
| Specifications | 3.0 × 20L × Ø10.0 × 4X |
| Packaging (mm) | 12.5 × 12.5 × 69L |
| Blade Diameter D | 3.0mm |
| Blade Length H | 15.0mm |
| Shank diameter d | Ø10.0mm |
| Overall Length L | 50.0mm |
| Coating | APLUS |
| MOQ | 2 pcs |
| Lead time | 1 week |
| Origin | Shenzhen, China |
Design details engineered for accuracy, tool life and process stability.
Achieves smooth, progressive entry, reducing tool impact and vibration. Taper angle accuracy is controlled within ±0.03°, perfectly matching the 1:16 taper requirement of NPT standard tapered pipe thread pilot holes.
Taper surface roughness Ra≤0.4μm, taper diameter tolerance controlled within ±0.01mm, enabling burr-free precision pilot hole machining without subsequent regrinding.
Utilizes carbide with a grain size ≤0.8μm and a substrate hardness of HRC63, combining high hardness and toughness, improving chipping resistance by 35% compared to ordinary tools.
Adopts DIN6535 standard straight shank, compatible with various clamping devices such as ER collets and hydraulic chucks, allowing for quick clamping on CNC machining centers and high-speed milling machines, improving tool change efficiency by 20%.
The tool surface is mirror polished, resulting in a friction coefficient as low as 0.25, effectively inhibiting built-up edge formation, especially suitable for machining high-gloss bottom holes in aluminum alloys.
Optimized streamlined chip grooves improve chip removal efficiency by 30%, preventing chip clogging in deep taper hole machining and reducing the risk of hole wall scratches.
The core diameter is 10% larger than ordinary taper tools, with a smooth transition to the new diameter, significantly improving tool rigidity and eliminating runout during high-feed machining.
Avoids the risk of coating peeling and provides excellent corrosion resistance, suitable for machining sealed bottom holes in humid environments.
Send your workpiece material and cutter dimensions. We supply standard end mills and special milling cutters made to your samples or drawings.