YG-1 29257 5/16″ HSSCo8 End Mill, 4 Flute, Corner Rounding, Uncoated Finish, 3-1/4″ Length

Description

Product Overview

The YG-1 29257 5/16″ HSSCo8 End Mill is engineered for demanding machining environments where precision and durability are paramount. Constructed from high‑speed steel (HSS) with a cobalt‑8 alloy composition, the tool offers superior hardness, heat resistance, and wear resistance, ensuring a long service life even under heavy cutting loads. Its 4‑flute design delivers a balanced chip evacuation and rigidity, allowing for consistent material removal while maintaining tight tolerances on corner rounding operations.

Measuring 3‑1/4″ in overall length, this end mill provides ample reach for deep pockets and complex geometries without sacrificing stiffness. The uncoated finish reduces friction and prevents premature buildup of material residues, which can affect surface finish and dimensional accuracy. With a 5/16″ shank diameter, the mill fits standard collet sizes, offering flexibility across a wide range of CNC machines and manual milling setups. The tool’s compact package dimensions (4.8 x 1.3 x 1.2 inches) and lightweight design (4.8 ounces) make it easy to handle, store, and integrate into existing tool inventories.

Designed specifically for corner rounding applications, the YG-1 end mill excels at creating smooth fillets on workpieces ranging from steel alloys to stainless steel. Its geometry minimizes the risk of burr formation, delivering clean edges that reduce post‑processing time. The product’s performance is reflected in its market ranking, holding a notable position among corner rounding end mills, which underscores its acceptance by professionals seeking reliable, high‑quality tooling.

Usage

Manufacturers and machining shops can employ this end mill in a variety of settings, from high‑volume production lines to low‑batch prototyping. Its robust HSSCo8 composition makes it suitable for machining hardened steels, alloy steels, and other tough materials where conventional high‑speed steel tools might fail. The 4‑flute configuration is particularly advantageous in CNC milling where high spindle speeds and rapid feed rates are required to achieve efficient material removal while maintaining surface integrity.

Typical applications include the creation of rounded edges on automotive components, aerospace brackets, medical device housings, and precision tooling parts. The tool’s uncoated finish also lends itself well to dry machining processes, reducing the need for coolant and simplifying shop floor logistics. Operators appreciate the tool’s ease of setup; the 5/16″ shank aligns seamlessly with standard collet chucks, allowing for quick tool changes and minimal downtime.

Why Choose Us

Choosing the YG-1 end mill means selecting a product backed by a reputable South Korean manufacturer known for rigorous quality control and continuous innovation. Each batch undergoes strict dimensional inspection to guarantee that the flute geometry, cutting edges, and overall length meet exact specifications, reducing variability and ensuring repeatable performance across multiple machining cycles.

Beyond the material advantages, YG-1 provides comprehensive customer support, including technical assistance for optimal cutting parameters, tool life optimization, and troubleshooting. Our after‑sales service includes a responsive help desk, detailed product documentation, and access to a network of regional distributors who can provide rapid replacements or additional tooling solutions as your production needs evolve.

Key Features

• High‑speed steel with 8% cobalt delivers exceptional hardness and heat resistance.
• Four‑flute design ensures stable cutting and efficient chip evacuation for smooth fillets.
• Uncoated finish reduces friction, extending tool life and simplifying cleanup.
• 3‑1/4″ overall length provides deep reach while maintaining rigidity for accurate machining.
• Dedicated customer support and technical guidance for optimal performance.

FAQ

What materials can this end mill effectively machine?

The YG-1 29257 end mill is suitable for a wide range of metals, including carbon steel, alloy steel, stainless steel, and other hardened alloys. Its HSSCo8 composition provides the hardness needed to cut through tough materials while maintaining a sharp cutting edge.

How does the uncoated finish affect tool performance?

The uncoated finish minimizes built‑up edge formation and reduces friction during cutting, which helps maintain consistent surface finish and prolongs tool life. It also allows for dry machining, reducing the need for coolant in certain applications.

Can this end mill be used in high‑speed CNC machines?

Yes. The 4‑flute geometry and balanced design make it well‑suited for high‑speed CNC milling. It can handle rapid spindle speeds and feed rates while delivering precise corner rounding and stable operation.

What is the recommended spindle speed and feed rate?

While exact parameters depend on the material being machined, a typical starting point for steel is a spindle speed of 3,000–4,500 RPM with a feed rate of 0.001–0.003 in/rev per flute. Adjustments should be made based on cutting depth, material hardness, and desired surface finish.

Is there a warranty or guarantee for this product?

YG‑1 offers a limited warranty covering manufacturing defects for a period of 12 months from the date of purchase. Should any issues arise, customers can contact our support team for replacement or repair options.