--- title: 4 Flutes Flat End Mill description: 4 Flutes Flat End Mill Special Deal on 4 Flutes Flat End Mill! Improve your ability to shape objects with the high-quality 4 Flutes Flat End Mill made by SAMHO. This instrument was designed for maximum cutting efficiency and long-lastingness by skilled artisans who are part of our staff. Trusting us as a reliable Chinese […] image: https://samhotool.com/wp-content/uploads/2024/08/6-4.jpg --- [Skip to content](#content) # 4 Flutes Flat End Mill ## Special Deal on 4 Flutes Flat End Mill! Improve your ability to shape objects with the high-quality 4 Flutes Flat End Mill made by SAMHO. This instrument was designed for maximum cutting efficiency and long-lastingness by skilled artisans who are part of our staff. Trusting us as a reliable Chinese producer, [Home](https://samhotool.com/) » [Steel Milling Bit](https://samhotool.com/steel-milling-bit/) » 4 Flutes Flat End Mill **Designed for Hardened Steels up to 65HRC — Superior Wear and Edge Resistance** Manufactured using ultra-fine grain tungsten carbide and enhanced with a high red-hardness nano-coating (e.g., TiAlN or AlCrN), this tool is optimized for machining high-HRC materials like SKD11, H13, D2, and other heat-treated tool steels. It offers excellent abrasion resistance and edge retention during prolonged cutting operations. **4-Flute Geometry for High Feed Rates and Surface Finish Quality** The 4-flute configuration increases the number of cutting edges in contact with the workpiece, enabling higher feed rates and improved material removal efficiency. This design ensures smoother cutting action, reduced vibration, and excellent surface integrity—especially suitable for finishing passes in hardened steel molds and precision components. **Flat End Geometry Ensures Precision in Slotting, Shoulder Milling, and Pocket Finishing** The flat tip delivers precise 90-degree edges and clean bottom surfaces, making this tool ideal for precision cavity milling, step finishing, and complex structural detail machining in hardened and heat-treated materials. **Enhanced Core Strength and Short Flute Design for Rigidity and Stability** Engineered with a reinforced core and short cutting length, the tool resists deflection and minimizes tool chatter—critical for high-tolerance machining in small features, narrow slots, and tight corners. **Advanced Heat-Resistant Coating Supports Dry and High-Speed Machining** The high-temperature-resistant coating ensures consistent cutting performance even under dry or minimum-quantity lubrication (MQL) conditions. This supports efficient, sustainable production while reducing coolant usage and operating costs. **Application-Specific Cutting Parameters Provided for 65HRC Materials** Samho provides precise machining parameters including spindle speed, feed rate, and depth of cut for various hardened steels, helping users minimize trial-and-error, reduce tool breakage, and achieve stable, repeatable performance. ![](https://samhotool.com/wp-content/uploads/2024/08/1723023066819-1024x108.webp) - ![](https://samhotool.com/wp-content/uploads/2023/11/4-1-1.png) ## Highly Recommend for Machining [![End Mill for Hardened Steel](https://samhotool.com/wp-content/uploads/2024/09/End-Mill-for-Hardened-Steel.webp)](https://samhotool.com/wp-content/uploads/2024/09/End-Mill-for-Hardened-Steel.png) [enquiry now](#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjY5NiIsInRvZ2dsZSI6ZmFsc2V9) - ![](https://samhotool.com/wp-content/uploads/2023/11/4-1-1.png) ## Specialty [![](https://samhotool.com/wp-content/uploads/2024/08/1723023108522.webp)](https://samhotool.com/wp-content/uploads/2024/08/1723023108522.png) ![End Mills](https://samhotool.com/wp-content/uploads/2024/08/pdf.webp) ### 4 Flutes Flat End Mill Catalog [Download](https://samhotool.com/wp-content/uploads/2025/07/4-Flutes-Flat-End-Mill-Catalog-2.pdf) ## Total 24 Models-Unit(Mm) ![](https://samhotool.com/wp-content/uploads/2024/08/Total-24-Models-UnitMm.webp) - ![](https://samhotool.com/wp-content/uploads/2023/11/4-1-1.png) ## 4 Flutes Flat End Mill Milling Conditions [![](https://samhotool.com/wp-content/uploads/2024/08/1723023296807-1024x571.webp)](https://samhotool.com/wp-content/uploads/2024/08/1723023296807.png) - ![](https://samhotool.com/wp-content/uploads/2023/11/4-1-1.png) ## Milling Amountfor Side Milling(mm) [![](https://samhotool.com/wp-content/uploads/2024/08/1723023308537-1024x579.webp)](https://samhotool.com/wp-content/uploads/2024/08/1723023308537.png) [For OEM Customization, Please Contact Us](https://samhotool.com/contacts/) Whatsapp: 8613316909493, Email: zane@samhotool.com ## Related Product Recommendation ![4 flutes corner radius end mill](https://samhotool.com/wp-content/uploads/2024/08/6-3.webp) 4 Flutes Corner Radius End Mill High-Quality... [Read More](https://samhotool.com/steel-milling-bit/4-flutes-corner-radius-end-mill/) ![mini end mill](https://samhotool.com/wp-content/uploads/2024/08/6-5.webp) 4 Flutes Long Neck Corner Radius End... [Read More](https://samhotool.com/steel-milling-bit/4-flutes-long-neck-corner-radius-end-mill/) ![4 Flutes Long Neck Flat End Mill](https://samhotool.com/wp-content/uploads/2024/08/6-6.webp) 4 Flutes Long Neck Flat End Mill... [Read More](https://samhotool.com/steel-milling-bit/4-flutes-long-neck-flat-end-mill/) × ## Table of Contents Table of Contents ### Get in touch with us Contact Form Demo First Name Email Phone/Mobile Your Message Submit Form ```json {"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/samhotool.com\/steel-milling-bit\/4-flutes-flat-end-mill\/","url":"https:\/\/samhotool.com\/steel-milling-bit\/4-flutes-flat-end-mill\/","name":"4 Flutes Flat End Mill - SAMHO","isPartOf":{"@id":"https:\/\/samhotool.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/samhotool.com\/steel-milling-bit\/4-flutes-flat-end-mill\/#primaryimage"},"image":{"@id":"https:\/\/samhotool.com\/steel-milling-bit\/4-flutes-flat-end-mill\/#primaryimage"},"thumbnailUrl":"https:\/\/samhotool.com\/wp-content\/uploads\/2024\/08\/6-4.webp","datePublished":"2024-08-07T09:29:11+00:00","dateModified":"2025-07-15T07:13:18+00:00","breadcrumb":{"@id":"https:\/\/samhotool.com\/steel-milling-bit\/4-flutes-flat-end-mill\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/samhotool.com\/steel-milling-bit\/4-flutes-flat-end-mill\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/samhotool.com\/steel-milling-bit\/4-flutes-flat-end-mill\/#primaryimage","url":"https:\/\/samhotool.com\/wp-content\/uploads\/2024\/08\/6-4.webp","contentUrl":"https:\/\/samhotool.com\/wp-content\/uploads\/2024\/08\/6-4.webp","width":800,"height":800,"caption":"hard milling end mill"},{"@type":"BreadcrumbList","@id":"https:\/\/samhotool.com\/steel-milling-bit\/4-flutes-flat-end-mill\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/samhotool.com\/"},{"@type":"ListItem","position":2,"name":"Steel Milling Bit","item":"https:\/\/samhotool.com\/steel-milling-bit\/"},{"@type":"ListItem","position":3,"name":"4 Flutes Flat End Mill"}]},{"@type":"WebSite","@id":"https:\/\/samhotool.com\/#website","url":"https:\/\/samhotool.com\/","name":"SAMHO","description":"China's Top Cutting Tools Manufacturers","publisher":{"@id":"https:\/\/samhotool.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/samhotool.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/samhotool.com\/#organization","name":"SAMHO","url":"https:\/\/samhotool.com\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/samhotool.com\/#\/schema\/logo\/image\/","url":"https:\/\/samhotool.com\/wp-content\/uploads\/2023\/11\/1.png","contentUrl":"https:\/\/samhotool.com\/wp-content\/uploads\/2023\/11\/1.png","width":"512","height":"512","caption":"SAMHO"},"image":{"@id":"https:\/\/samhotool.com\/#\/schema\/logo\/image\/"}}]} ```