Walter SST+ 1/16 Inch Cobalt Double-Ended Stub Drill Bit

Precision Engineering for Tough Materials

The Walter 1/16" SST+ Double-Ended Stub Drill Bit represents the pinnacle of drilling geometry and metallurgy for thin-walled applications. At the core of its performance is the specialized Cobalt HSS alloy formulation. Unlike standard high-speed steel, this cobalt-enriched material is capable of withstanding significantly higher operating temperatures. This is critical when drilling hard materials like stainless steel, where work-hardening can occur if the bit overheats and dulls. The result is a cutting tool that stays sharp longer and cuts faster.

Precision is paramount in metalworking, and the SST+ geometry delivers exactly that. The bit features a self-centering split point that bites into the material immediately upon contact. This eliminates the "walking" or skating effect often seen with standard chisel-point bits, removing the need for pre-punching center holes. This feature is particularly valuable when working on curved surfaces or when precise hole placement is non-negotiable. Furthermore, the high-flow flute design is engineered to evacuate chips rapidly, preventing clogging and heat accumulation that can lead to premature failure.

The "stub" configuration serves a functional mechanical purpose beyond just size. By reducing the distance between the chuck and the workpiece, the bit offers maximum torsional strength. This rigidity ensures that the energy from the drill is transferred directly into the cut rather than being lost to flexion. For welders and fabricators working with rivets, body panels, or electrical enclosures, this 1/16" bit provides the control and durability required for professional results. The double-ended configuration further enhances value, ensuring a fresh cutting edge is always ready at hand.

Technical Superiority

• SST+ Geometry: Optimized cutting angles for aggressive material removal with minimal feed pressure.
• Self-Centering: 135-degree split point prevents wandering for pinpoint accuracy.
• Surface Treatment: Specialized coating reduces friction coefficient for smoother drilling action.