Walter #30 Cobalt Stub Drill Bit for Stainless Steel

The Welder's Choice for Tough Drilling Jobs

Every welder knows the frustration of a drill bit snapping off right in the middle of a critical job. The Walter #30 SST Stub Drill (01J030) is built to solve exactly that problem. Known in the trade as a "stubby" or screw machine length bit, its short, stout profile provides the strength needed to lean into the cut without the bit flexing or shattering. This is especially important when drilling out spot welds, rivet holes, or pilot holes in automotive frames and heavy structural steel where side-loading a standard length bit often leads to failure.

When you are fabricating with stainless steel, heat is the enemy. Standard bits burn up quickly as stainless work-hardens. Walter has engineered these bits with a premium cobalt blend that thrives in high-heat applications. This means you can drill through 304 or 316 stainless steel brackets, flanges, and sheets without stopping constantly to sharpen or replace your bit. The unique Bronze SST coating acts as a lubricant and heat shield, helping chips slide out of the hole smoothly and keeping the cutting edge cooler for longer life.

Speed matters on the shop floor. The 135° split point tip on the 01J030 bites into the metal instantly. You won't have to worry about the bit wandering off your mark, which saves you time and protects your base material from scratches. It is sized as a #30 wire gauge bit (approx. 0.1285 inches), making it a versatile size for rivet work and tapping preparation. Whether you are modifying a truck bed, repairing agricultural equipment, or building a custom stainless exhaust, this is the reliable bit you need in your arsenal.

Why Welders Prefer Walter SST

• Unbreakable Performance: The short length prevents the flexing that causes standard bits to snap.
• Stainless Ready: Specifically formulated to cut through hard metals that destroy lesser bits.
• No Walking: The split point tip grabs the metal instantly, perfect for freehand drilling.