01J015 - Walter SST #15 Cobalt Stub Drill Bit for Stainless Steel

High-Performance Drilling with Walter SST Stub Drills

The Walter #15 SST Stub Drill Bit (01J015) is an industrial-grade cutting tool engineered for professionals who demand precision and durability. Manufactured by Walter Surface Technologies, this drill bit is part of the renowned SST series, known for its ability to tackle the toughest materials, including stainless steel and hard alloys. The key to its performance lies in its premium cobalt blend construction, which provides significantly higher heat resistance than standard high-speed steel (HSS) bits. This allows the bit to maintain its cutting edge even under the high temperatures generated when drilling through hardened metals.

One of the standout features of this model is its "stub" or screw machine length. By shortening the overall length and the flutes, Walter has created a bit with superior rigidity. This design minimizes flexing and vibration, which are the primary causes of bit breakage, especially when using hand-held drills. The increased rigidity also ensures more accurate holes and allows for higher feed rates. The bit features a specialized bronze SST surface treatment that further enhances performance by reducing friction and facilitating smoother chip evacuation.

Equipped with a self-centering split point, the Walter #15 SST Stub Drill starts cutting immediately upon contact, eliminating the need for a center punch and preventing the bit from "walking" across the workpiece. This is particularly advantageous when drilling on curved surfaces or smooth sheet metal. Whether you are operating a stationary drill press or a portable power tool, this drill bit delivers consistent, reliable results in the most demanding industrial environments.