01J039 - Walter SST+ Stub Drill Bit #39 - Cobalt Blend

High-Rigidity Drilling for Sheet Metal

The Walter SST+ Stub Drill Bit #39 (01J039) is engineered to solve the common challenges faced when drilling through thin gauge metals and hard alloys. Unlike standard length bits that can flex and break under pressure, this stub (screw machine length) drill bit features a compact design that maximizes rigidity. This structural stability allows for higher feed rates and significantly reduces the likelihood of snapping, making it an essential tool for high-volume fabrication and maintenance tasks.

Manufactured from a specialized cobalt blend, the SST+ series is designed to withstand the intense heat generated when drilling tough materials like stainless steel. The addition of Walter's exclusive bronze SST surface treatment further enhances performance by reducing friction and facilitating smooth chip evacuation. This combination of material science and geometric design ensures that the bit stays sharp longer, providing a better return on investment for professional workshops.

Precision is paramount with the 01J039. It features a 135° split point that self-centers immediately upon contact with the material. This eliminates the need for center punching and prevents the bit from "walking" or skating across the surface, which is critical when working with polished or finished sheet metal. Whether used in a stationary drill press or a portable hand drill, this bit delivers clean, round holes with minimal burr formation.

Key Applications

• Sheet Metal Fabrication: Short flute design prevents flexing on thin materials.
• Stainless Steel: Cobalt content resists heat and wear in hard alloys.
• Confined Spaces: Compact length fits easily into tight areas.
• General Maintenance: Reliable performance on mild steel and non-ferrous metals.