01J028 - Walter SST+ #28 Cobalt Stub Drill Bit for Stainless Steel

High-Performance Rigidity for Tough Drilling

The Walter SST+ #28 Stub Drill Bit (01J028) is a premium cutting tool designed to solve the common frustrations of drilling into hard metals and thin gauge sheets. Unlike standard jobber length bits that can flex and wander, this stub drill features a short flute design that maximizes rigidity. This structural stability allows for higher feed pressure without the risk of the bit snapping, making it an indispensable tool for industrial MRO environments where reliability is paramount.

Manufactured from a specialized cobalt blend, the SST+ series is engineered to withstand the intense heat generated when drilling high-tensile materials like stainless steel. The addition of cobalt to the high-speed steel matrix ensures that the cutting edges remain sharp far longer than standard HSS bits. Furthermore, the bit is finished with Walter's exclusive bronze SST surface treatment, which acts as a lubricant to reduce friction and heat buildup, facilitating smoother chip flow and cleaner holes.

Precision is key with the 01J028. It features a 135° split point geometry that bites into the material immediately upon contact. This self-centering action eliminates the need for pre-punching and prevents the bit from "walking" across the surface, which is critical when working with polished stainless steel or rounded surfaces. Whether you are drilling out rivets, working on automotive body panels, or fabricating industrial enclosures, this #28 wire gauge bit delivers consistent, professional results.

Key Technical Benefits

• Enhanced Durability: Cobalt blend construction resists heat and wear in abrasive materials.
• Breakage Resistance: Short overall length reduces torque stress and flexing.
• Precision Starting: 135° split point ensures accurate hole placement without wandering.