01B513 - Walter SST+ Cobalt Jobber Drill Bit #13 (0.1850")

The Fabricator's Choice for Stainless Steel Drilling

For professional welders and metal fabricators, hole preparation is a critical step that sets the stage for high-quality assembly. The Walter 01B513 SST+ Jobber Drill Bit #13 is designed to meet the rigorous demands of the welding industry, particularly when working with stainless steel and other tough alloys. Precision fit-up is essential for structural integrity, and this drill bit ensures that every rivet hole and bolt passage is drilled to exact specifications (0.1850 inches) with minimal effort.

Engineered for the Toughest Alloys

Stainless steel fabrication presents unique challenges, primarily due to the material's tendency to work-harden as it is cut. If a drill bit dulls or rubs instead of cutting, the material becomes impenetrable. The Walter SST+ series combats this with a heavy-duty cobalt blend construction. This material provides the red-hardness necessary to cut aggressively through stainless steel without losing its edge. For welders working in the field with cordless power tools, this aggressive cutting action translates to extended battery life, as less pressure and time are required to complete each hole.

Self-Centering Accuracy on Curved Surfaces

Fabricators often need to drill into pipes, tubing, or curved profiles where standard bits are prone to slipping. The 01B513 features a sophisticated 135° split point "Speed Tip" that bites into the metal immediately upon contact. This self-centering capability is a game-changer for pipe welders and fitters, allowing for precise hole placement on round surfaces without the tedious step of using a center punch. The result is a clean, accurate hole that facilitates perfect alignment for subsequent welding or fastening operations.

Durability That Lasts

The structural design of the Walter SST+ bit is focused on longevity. The body of the bit is back-tapered, a feature that slightly reduces the diameter of the bit behind the cutting tip. This clever engineering prevents the sides of the bit from binding in the hole, reducing friction and the likelihood of breakage—a common frustration when drilling deep holes or stacking sheets. Combined with the high-flow flute geometry that ejects hot chips away from the cutting zone, the 01B513 runs cooler and lasts longer. Whether you are drilling pilot holes for TIG welding or clearance holes for fasteners, the Walter SST+ #13 delivers the reliability professional fabricators demand.