01H016 - Walter 1/4 Inch SST Stub Length Drill Bit for Stainless Steel

Precision Engineering for Industrial Drilling: Walter SST Stub Series

The Walter 01H016 1/4" SST Stub Drill Bit represents the pinnacle of drilling technology for maintenance, repair, and operations (MRO) professionals. Engineered to address the common failure points of standard high-speed steel bits, this tool is specifically designed for high-performance drilling in thin-walled materials and tough alloys. The "stub" or screw machine length configuration significantly reduces the overall length of the bit relative to its diameter. This geometric alteration drastically increases the torsional rigidity of the tool, minimizing deflection under load and virtually eliminating the risk of breakage caused by side-loading or vibration.

At the tip of the 01H016 lies a precision-ground 135° split point. Unlike standard 118° points that require significant axial force to penetrate and often wander on the workpiece, this split point geometry is self-centering. It engages the material immediately upon contact, ensuring precise hole location without the prerequisite of center-punching. This feature is particularly advantageous when drilling on curved surfaces, such as pipes or tubing, where bit walking is a frequent issue. The 135° angle also distributes the cutting load more efficiently, allowing for faster penetration rates in high-tensile materials like stainless steel.

To further enhance performance, Walter applies a proprietary Bronze SST surface treatment to the bit. This specialized coating serves a dual purpose: it increases surface hardness to resist abrasion and significantly lowers the coefficient of friction between the tool and the chip. The result is improved chip evacuation and reduced heat generation—the primary enemy of drill bit longevity. Whether deployed in a stationary drill press for production runs or used in a portable hand drill for on-site repairs, the Walter 1/4" SST Stub Drill delivers consistent, burr-free holes in mild steel, non-ferrous metals, and stainless steel. It is an essential component for any industrial tooling inventory requiring reliability and precision in confined spaces.