Walter SST+ #40 Cobalt Stub Drill Bit for Stainless Steel

Reliable Cobalt Drilling for Fabricators

For professional welders and fabricators, a broken drill bit is more than just an annoyance—it's a stoppage in production and a potential safety hazard. The Walter 01J040 #40 SST Stub Drill is engineered to withstand the rigors of the metalworking shop, specifically targeting the challenges of drilling stainless steel and other ferrous metals. With a diameter of #40 (0.0980 inches), this bit is sized for precision work where accuracy and durability are non-negotiable. It is the ideal solution for creating pilot holes, drilling out rivets, or preparing assemblies for fasteners.

The secret to the 01J040's longevity lies in its Cobalt Blend construction. Unlike standard HSS bits that dull quickly on hardened alloys, this cobalt-infused tool resists the thermal stress that ruins lesser bits. Stainless steel has a tendency to work-harden if the drill bit dwells too long in one spot; the Walter SST's ability to cut aggressively and stay sharp helps prevent this phenomenon. The stub length design further enhances its suitability for the welding shop; the shorter profile allows for access into tighter spaces, such as inside chassis or frames, and provides the stiffness needed to push through tough materials without flexing or snapping.

Efficiency is key in any fabrication job. The quick-cutting split point ensures you spend less time starting the hole and more time drilling. The specialized bronze surface treatment acts as a lubricant and shield, keeping the bit cooler and preventing chip welding. This coating is a hallmark of the Walter SST line, signaling a tool that is built for performance. When your project demands a hole in sheet metal or a structural component, trust the Walter SST Stub Drill to get through it cleanly and quickly. It is a tool built for those who demand professional-grade performance from their consumables, ensuring that every hole is precise and every bit lasts as long as possible.