Micro 100 Corner Rounding End Mill CRE-312-109 Double-Ended 5/16″

Description

Product Overview

The Micro 100 CRE-312-109 Corner Rounding End Mill is engineered for high‑precision corner radius machining across a broad range of industrial applications. Featuring a robust 5/16″ shank, the tool provides excellent rigidity and stability during high‑speed cutting, while the .060″ flute diameter ensures clean material removal with minimal chip buildup. The double‑ended configuration doubles productivity by allowing users to flip the tool without changing the holder, effectively extending tool life and reducing downtime.

Designed with a 7/64″ radius profile, this end mill creates smooth, burr‑free corners that are essential for parts requiring tight tolerances and aesthetic finish. The uncoated carbide construction delivers consistent performance in a variety of metals, including stainless steel, aluminum alloys, and hardened steels, making it a versatile choice for both prototype development and high‑volume production runs. Its compact overall length of 2‑1/2″ (63.5 mm) enables use in tight machine setups while maintaining excellent chip evacuation.

Precision engineering is evident in the tool’s geometry: the 1° max flare at the pilot and shoulder eliminates step formation, while the tangent design reduces the risk of workpiece deformation. The tool’s maximum lead‑in length of .005″ ensures smooth entry into the material, further enhancing surface finish quality. With a weight of only 0.35 oz, the end mill offers a balance of durability and ease of handling during tool changes.

Micro 100 Tool Corporation, a trusted name in cutting tool manufacturing, guarantees that each end mill meets stringent quality standards. The CRE‑312‑109 model has been in production since 2013, reflecting a proven track record of reliability and performance in demanding machining environments. Whether you are a CNC programmer, a machine shop owner, or a maintenance engineer, this corner rounding end mill provides the accuracy and repeatability needed for critical machining tasks.

Usage

This end mill excels in applications where clean corner radii are required, such as aerospace component fabrication, automotive part machining, and medical device manufacturing. Its ability to produce consistent 7/64″ radius cuts makes it ideal for creating mating features, reducing assembly stress, and improving overall part durability. The tool performs well in both CNC milling centers and manual machining stations, offering flexibility for various shop floor configurations.

When machining harder materials like stainless steel or titanium, the double‑ended design allows operators to quickly switch cutting direction without re‑tooling, maximizing uptime. The tool’s compact shank and overall length enable use in tight fixturing scenarios, such as deep‑hole drilling or slotting where space is limited. Additionally, the uncoated carbide material provides excellent wear resistance, extending tool life even under heavy cutting conditions.

For finishing operations, the smooth radius profile reduces the need for secondary deburring processes, saving both time and labor costs. The tool’s low lead‑in length ensures a gentle entry into the workpiece, minimizing surface distortion and preserving tight tolerances. Whether you are producing prototype parts or high‑volume production runs, the Micro 100 CRE‑312‑109 delivers reliable performance across a spectrum of machining challenges.

Why Choose Us

Choosing Micro 100 means selecting a brand with decades of experience in precision cutting tools. Our commitment to quality is reflected in rigorous testing protocols, ensuring each end mill meets exacting standards for dimensional accuracy, hardness, and balance. The CRE‑312‑109 model benefits from advanced carbide formulation that resists chipping and maintains edge integrity, even under demanding cutting speeds and feeds.

We stand behind our products with comprehensive technical support and a responsive customer service team ready to assist with tool selection, machining parameters, and troubleshooting. Our distribution network ensures rapid delivery, minimizing inventory holding costs for your operation. By partnering with Micro 100, you gain access to a suite of complementary cutting tools, allowing you to standardize on a single trusted supplier for all your milling needs.

Key Features

• Double‑ended design doubles productivity by eliminating tool changes for opposite cuts.
• 5/16″ shank provides superior rigidity and compatibility with standard collet sizes.
• .060″ flute and 7/64″ radius create clean, burr‑free corners, reducing secondary finishing.
• Uncoated carbide offers high wear resistance for machining steel, aluminum, and tougher alloys.
• Backed by Micro 100’s technical support and rapid parts availability for minimal downtime.

FAQ

What materials can I machine with this end mill?

The CRE‑312‑109 is suitable for a wide range of metals, including stainless steel, carbon steel, aluminum alloys, brass, and even harder materials like titanium when appropriate cutting parameters are used.

Can I use this tool in a high‑speed CNC machine?

Yes, the tool’s geometry and carbide composition are designed for high‑speed applications. Adjust spindle speeds and feed rates according to the material and desired surface finish for optimal results.

Is the tool compatible with standard collet sizes?

The 5/16″ (8 mm) shank fits standard 8 mm collets and chucks commonly found on most CNC milling machines, making it easy to integrate into existing setups without additional adapters.

How does the double‑ended design improve efficiency?

With two usable cutting edges, you can flip the tool after one side wears, effectively doubling the usable life of the tool holder and reducing the number of tool changes required during a machining cycle.

What warranty or support does Micro 100 provide?

Micro 100 offers a limited warranty against manufacturing defects and provides technical assistance for tool selection, machining parameters, and troubleshooting to ensure you achieve the best possible performance.