01K016 - Walter 1/4 Inch SST+ Double-Ended Cobalt Stub Drill Bit

High-Performance Drilling for Precision Fabrication

The Walter 01K016 1/4" SST Double-End Stub Drill represents the pinnacle of efficiency for industrial drilling applications. Engineered specifically for the demands of sheet metal fabrication and thin-walled material processing, this tool combines advanced metallurgy with a geometry designed for resilience. The core of the bit is constructed from a proprietary Cobalt High-Speed Steel (HSS) blend, which provides significantly higher heat resistance and wear durability than standard black oxide or titanium-coated alternatives. This material composition allows the bit to maintain its cutting edge even under the thermal stress of repetitive drilling in tough metals.

One of the defining features of this product is its double-ended configuration. By integrating cutting points on both ends of the shaft, Walter effectively doubles the lifespan of a single unit, reducing inventory costs and downtime associated with tool changes. The "stub" length is a critical design choice; by shortening the overall length of the bit, torsional stress is minimized, and rigidity is maximized. This virtually eliminates the risk of snapping the bit, a common issue with jobber-length drills in portable applications. Furthermore, the bit features Walter's exclusive SST surface treatment, which utilizes a bronze-oxide tempering process to enhance lubricity, facilitate chip flow, and reduce heat buildup.

Precision is ensured through a 135-degree self-centering split point. This geometry prevents the bit from "walking" or wandering across the workpiece surface, allowing for accurate hole placement without the prerequisite of a center punch. The high-flow flute design complements this by rapidly evacuating swarf and chips, preventing clogging that can lead to overheating. Whether used for drilling out rivets, creating pilot holes, or general fabrication in mild steel, stainless steel, or aluminum, the Walter 01K016 delivers consistent, professional-grade performance.