Micro 100 Corner Rounding End Mill CRE-375-140X Double-Ended AlTiN

Description

Product Overview

The Micro 100 CRE-375-140X corner rounding end mill is a precision‑engineered cutting tool designed to create exact 9/64″ radius corners in a wide range of workpieces. Constructed from high‑grade steel and finished with an AlTiN (Aluminum Titanium Nitride) coating, the mill offers exceptional hardness and thermal stability, extending tool life even under demanding machining conditions. Its .060″ flute provides a balanced chip evacuation rate while maintaining rigidity, and the 3/8″ shank diameter ensures compatibility with standard CNC spindle holders. The double‑ended design effectively doubles productivity by allowing the operator to flip the tool without changing the holder, reducing downtime and increasing overall throughput.

Key specifications include a 2‑1/2″ overall length (OAL), a 9/64″ radius cutting edge, and a maximum lead‑in length of .005″ to minimize entry marks. The tool’s package dimensions are compact at 2.6 x 0.5 x 0.5 inches, weighing only 1.6 ounces, which simplifies inventory handling and reduces shipping costs. Since its introduction in November 2014, the CRE‑375‑140X has consistently ranked among the top performers in the Corner Rounding End Mills category, reflecting its reliability and popularity among professional machinists.

Usage

This end mill excels in applications where clean, rounded corners are essential. Typical use cases include aerospace component fabrication, medical device manufacturing, and high‑precision tooling for automotive parts. The tool is especially effective when machining hardened steels, stainless steels, titanium alloys, and other difficult‑to‑cut materials where traditional flat‑end mills would generate excessive burrs or require secondary deburring operations.

In CNC environments, the CRE‑375‑140X can be programmed for both conventional and climb milling strategies, offering flexibility for various machine configurations. Its 1° max flare tangent at the pilot and shoulder reduces the likelihood of step formation, ensuring a smooth transition from the flat surface to the rounded corner. The double‑ended nature allows the operator to alternate cutting directions without re‑tooling, which is particularly advantageous in high‑volume production runs where cycle time is a critical metric.

When used in conjunction with coolant delivery systems, the AlTiN coating further enhances lubricity, reducing friction and heat buildup at the cutting interface. This results in a more stable cutting process, lower tool wear, and improved surface finish. For best results, users should select appropriate feed rates and spindle speeds based on material hardness and desired surface quality, referencing the manufacturer’s recommended machining parameters.

Why Choose Us

Micro 100 Tool Corporation has a long history of delivering high‑performance cutting tools that meet the rigorous demands of modern manufacturing. The CRE‑375‑140X benefits from the company’s proprietary AlTiN coating technology, which combines the hardness of titanium nitride with the oxidation resistance of aluminum nitride. This synergy provides a tool surface that resists wear, maintains sharpness, and performs reliably at elevated temperatures.

Quality assurance is integral to every production batch. Each end mill undergoes strict dimensional inspection, coating thickness verification, and hardness testing before leaving the factory. This ensures that every unit conforms to the exact tolerances required for precision machining, giving customers confidence in repeatable performance across multiple orders.

In addition to product durability, Micro 100 offers comprehensive technical support. Our engineering team is available to assist with tool selection, machining strategy development, and troubleshooting, helping customers achieve optimal results without unnecessary trial‑and‑error. We also provide a clear warranty policy that covers manufacturing defects, reinforcing our commitment to long‑term customer satisfaction.

Key Features

• AlTiN coating delivers superior wear resistance and reduced friction for longer tool life.
• Double‑ended design cuts production time in half by eliminating tool changes.
• .060″ flute provides efficient chip evacuation while maintaining rigidity for accurate cuts.
• 1° max flare tangent minimizes steps and burrs, ensuring a smooth corner transition.
• Dedicated technical support and warranty give confidence in performance and reliability.

FAQ

What materials can the CRE‑375‑140X effectively machine?

The end mill is suitable for hardened steels, stainless steels, titanium alloys, nickel‑based superalloys, and other high‑strength materials where a clean rounded corner is required.

How does the AlTiN coating improve machining performance?

AlTiN provides a hard, oxidation‑resistant surface that reduces tool wear and maintains cutting edge sharpness at high temperatures, allowing higher cutting speeds and longer intervals between tool changes.

Can the tool be used for both conventional and climb milling?

Yes, the geometry of the CRE‑375‑140X supports both conventional and climb milling strategies, giving flexibility to adapt to different CNC machine setups and material requirements.

What is the recommended coolant type for this end mill?

Using a water‑soluble coolant or a high‑performance oil‑based coolant helps to further reduce heat and improve chip evacuation, especially when machining tough alloys.

Is the double‑ended feature compatible with standard tool holders?

The 3/8″ shank diameter conforms to common CNC spindle and collet specifications, allowing the tool to be mounted in standard holders without special adapters.