01U005 - Walter 5/16 Inch 82-Degree VP High Speed Steel Countersink

Precision Countersinking with Walter Surface Technologies

The Walter 5/16" 82° Variable Pitch Countersink (SKU: 01U005) is a high-performance cutting tool engineered to deliver superior results in metalworking applications. Designed by Walter Surface Technologies, a leader in industrial abrasives and tooling, this countersink addresses common issues found in standard tooling, such as chatter, vibration, and poor surface finish. Whether you are a professional fabricator, machinist, or maintenance technician, this tool provides the reliability and precision needed for critical finishing tasks.

Advanced Variable Pitch Design

One of the standout features of this tool is its Variable Pitch (VP) geometry. Unlike traditional countersinks that often vibrate and leave chatter marks on the workpiece, the Walter VP design utilizes unevenly spaced flutes. This engineering breakthrough disrupts the harmonic resonance that causes chatter, ensuring a smooth, mirror-like finish every time. This is particularly important when preparing holes for flush-mount screws where surface integrity and aesthetics are paramount.

Durable M2 HSS Construction

Durability is at the core of the 01U005. It is crafted from M2 High-Speed Steel (HSS), a material renowned for its toughness and wear resistance. To further enhance its performance, the tool undergoes a special surface treatment that increases hardness and reduces friction. This makes it exceptionally capable of handling tough materials, including stainless steel, mild steel, and various non-ferrous alloys, without losing its cutting edge prematurely.

Versatile Applications

This 5/16-inch tool is not limited to just countersinking. It excels at deburring drilled holes to remove sharp edges and chamfering workpiece edges for assembly preparation. Its 82-degree angle is the industry standard for most flat-head screws used in North America, making it an essential addition to any tool crib. Whether used in a portable hand drill or a stationary drill press, the Walter 01U005 delivers consistent, high-quality performance.