01W303 - Walter SA-3 Non-Ferrous Carbide Burr for Aluminum

Technical Overview of Walter 01W303

The Walter 01W303 is a high-precision carbide burr from the Allsteel™ series, specifically engineered with a Non-Ferrous (NF) cut pattern. This tool features the industry-standard SA-3 shape, a cylindrical geometry with a flat end (no end cut), making it optimal for surface milling, contouring, and deburring parallel to the axis of rotation. The burr typically measures 3/8" in head diameter with a 3/4" length of cut, mounted on a standard 1/4" hardened steel shank.

The defining technical characteristic of this SKU is its flute geometry. Unlike double-cut burrs designed for steel, the NF cut utilizes a more open, aggressive flute design with high relief angles. This geometry is critical for machining soft, ductile materials like aluminum, magnesium, and plastics, where chip evacuation is paramount to prevent "loading" (material welding to the cutting edges). By maintaining clear flutes, the 01W303 ensures consistent cutting action and reduces heat generation, which preserves both the tool life and the metallurgical integrity of the workpiece.

Manufactured in the USA, these burrs undergo rigorous quality control to ensure concentricity. High concentricity minimizes runout, which reduces vibration (chatter) during operation. This is essential for protecting the bearings of high-speed pneumatic die grinders and CNC spindles, ensuring operator safety and part accuracy.