01J021 - Walter SST+ #21 Cobalt Stub Drill Bit for Sheet Metal

High-Performance Drilling for Tough Materials

The Walter #21 SST Stub Drill Bit (01J021) is an industrial-grade cutting tool engineered for professionals who demand precision and durability. Part of Walter's renowned SST+ line, this drill bit is manufactured from a premium cobalt blend that provides exceptional heat resistance, allowing it to maintain its cutting edge even when drilling through hard materials like stainless steel and high-tensile alloys.

What sets this bit apart is its stub length design. Unlike standard jobber drills, the shorter overall length and flute geometry provide maximum rigidity. This structural integrity virtually eliminates the flexing and bowing common in longer bits, significantly reducing the risk of breakage during operation. It is the ideal choice for drilling into sheet metal where control and stability are paramount.

The bit features a specialized Bronze SST surface treatment, a proprietary finish that reduces friction between the tool and the workpiece. This coating not only helps in heat dissipation but also promotes smoother chip flow, preventing clogging and binding. Combined with a heavy-duty split point, the Walter 01J021 self-centers immediately upon contact, ensuring accurate hole placement without the need for a center punch or pilot hole.

Key Industrial Benefits

Designed for versatility, this drill bit excels in both portable hand drills and stationary drill presses. Its robust web construction allows for higher feed rates, increasing productivity in manufacturing and maintenance environments. Whether you are working with mild steel, non-ferrous metals, or challenging stainless steel sheets, the Walter SST Stub Drill delivers consistent, high-quality results.