01K005 - Walter SST+ 5/64" Cobalt Double-Ended Stub Drill Bit

Precision Engineering for Thin Gauge Applications

The Walter 01K005 5/64" SST Double-End Stub Drill represents the pinnacle of drilling efficiency for sheet metal and thin-walled fabrication. Engineered by Walter Surface Technologies, this tool addresses the common failure points associated with small-diameter drilling: breakage due to flexion and rapid dulling. By utilizing a stub length geometry, the bit significantly reduces the lever arm during operation, providing exceptional rigidity that prevents the snapping often seen with jobber-length bits in similar applications. This structural integrity is paramount when working with high-tensile materials or when applying manual pressure in portable drilling scenarios.

Metallurgically, the 01K005 is crafted from a premium Cobalt HSS (High-Speed Steel) blend. This composition offers superior hardness and heat resistance compared to standard black oxide bits, allowing it to maintain a cutting edge even under the high thermal loads generated by friction in stainless steel and hard alloys. The bit features Walter's proprietary SST surface treatment, which enhances lubricity and facilitates chip evacuation. This is complemented by a "high flow" flute design that rapidly clears debris from the hole, reducing heat buildup and preventing work-hardening of the material.

The double-ended configuration effectively halves the tooling cost per hole. When one end eventually wears, the operator simply reverses the bit in the chuck to utilize a fresh, factory-ground point. The point itself boasts a specialized self-centering geometry, eliminating the need for center punching and ensuring precise hole placement without "walking," even on curved or polished surfaces. For MRO professionals and industrial fabricators, this drill bit delivers a combination of longevity, precision, and reliability that standard tooling cannot match.