Carbide Radius Corner Rounding Inner R End Mills 4 Flute TiSiN Coated,for Milling Alloy Steels,Hardened Steel, Metal. (R5*18*D12*75L*4F)

【Factory Direct Sales】  
We operate our own factory, eliminating middlemen to reduce costs and offer higher cost-effectiveness.  
Same price, better quality; same quality, better price.

【Complete Specifications】  
Wide range of specifications available. Contact customer service for special specifications. Custom orders accepted for bulk quantities.

 6 Core Upgrades  
1. Nano Coating  
2. Fine Micro-Grain Structure  
3. High Wear Resistance  
4. Smooth Cutting Performance  
5. Solid Tungsten Carbide Construction  
6. Clean and Smooth Cutting Surface  

【Stringent Material Selection】
0.2UM micro-grain tungsten carbide hard alloy
We use raw tungsten carbide from leading manufacturers—no recycled materials. The tool is integrally formed in one piece, precision-ground with high-end ANCA grinding equipment and high power, ensuring exceptional stability and fundamentally guaranteeing tool quality. The micro-grain tungsten carbide substrate offers higher wear resistance and strength, excellent processing performance, and maintains high hardness even under high temperatures generated during high-speed cutting.

【TiSiN Nano Coating】  
- Multi-layer coating technology enhances processing efficiency  
- TiSiN coating provides high hardness, excellent wear resistance, high thermal conductivity, smooth surface finish, and corrosion resistance  
- Ensures stable performance and extended tool life

【Cutter Head Design】
Four-flute internal R-arc design enables simultaneous internal and external chamfering in a single operation. The R-angle is precise, delivering smooth and burr-free results. The brushed finish inside the flutes improves chip evacuation and reduces chip adhesion. High efficiency and strong vibration resistance. Fully ground cutting edges with passivation treatment balance edge strength and sharpness, enhancing tool rigidity. Reduces chipping, decreases frequency of tool changes, and extends service life.

【Tool Shank Design】  
- Universal chamfered round shank ensures firm grip and easy clamping  
- Durable and user-friendly

【Applications】Internal and external chamfering
【Compatible Materials】
Suitable for processing metals such as cast iron, steel, copper alloys, aluminum, carbon steel, stainless steel, etc.
【Compatible Machines】  
- CNC machines, engraving machines, precision engravers  
- Not suitable for bench drills or hand drills

Specifications： 【Mill Diameter】+【Inner R angle】+【Shank Diameter】+【Overall Length】
unit：mm
R0.5xD4x50: 4 --  R0.5 -- 4 -- 50
R1xD4x50: 4 --  R1 -- 4 -- 50
R1.5xD6x50: 6 --  R1.5 -- 6 -- 50
R2xD6x50: 6 --  R2 -- 6 -- 50
R2.5xD8x60: 8 --  R2.5 -- 8 -- 60
R3xD8x60: 8 --  R3 --   8 -- 60
R4xD10x75: 10 --  R4 -- 10 -- 75
R5xD12x75: 12 --  R5 -- 12 -- 75

【Instructions for Use】
Information buyers need to know when selecting and operating the tool:
1. Before using the tool, check the tool runout. If the runout accuracy exceeds 0.01mm, correct it before proceeding with cutting.  
2. Keep the tool extension out of the collet as short as possible. If a longer extension is necessary, reduce the speed, feed rate, or depth of cut.  
3. If abnormal vibration or noise occurs during cutting, reduce the speed and feed rate until the situation improves.  
4. For cooling steel, mist or air spray cooling is recommended, as it significantly enhances the milling tool’s performance.  
5. Cutting performance can be affected by the workpiece, machine, and software. The provided data are for reference only. Once the cutting process stabilizes, the feed rate can be increased by 30% to 50%.  
6. For other specifications or additional inquiries, please contact customer service.