Walter SST+ Stub Drill Bit #39 - Cobalt Blend

Heavy-Duty Cobalt Performance

Tackle your toughest drilling jobs with the Walter #39 SST+ Stub Drill Bit. Built for the professional welder and fabricator, this bit (SKU: 01J039) combines industrial-grade durability with precision engineering. The core of this tool is its high-performance cobalt blend construction, which maintains hardness even at high temperatures. This makes it the ideal choice for drilling through work-hardening materials like stainless steel, where standard high-speed steel bits often fail.

The "Stub" or screw machine length configuration is a favorite among professionals for its superior strength. By shortening the overall length and the flutes, Walter has created a bit that resists bending and breaking, even under heavy feed pressure. This rigidity is particularly beneficial when drilling into rounded surfaces or when using hand-held power tools where maintaining a perfectly perpendicular angle is difficult. The bronze SST finish acts as a lubricant and heat shield, ensuring smooth operation and extending the life of the cutting edges.

Efficiency is built into the tip design. The 135-degree split point bites into the metal instantly, allowing for rapid penetration with less force required from the operator. This feature speeds up workflow and reduces fatigue during repetitive drilling tasks. From automotive bodywork to industrial HVAC installation, the Walter SST+ Stub Drill Bit delivers consistent, professional results every time.

Features & Benefits

• Cobalt Blend: Superior heat and abrasion resistance for hard metals.
• Stub Geometry: Short length provides maximum torque transfer and breakage resistance.
• Self-Centering: Split point tip prevents wandering for precise hole placement.
• Versatile Use: Excellent for mild steel, aluminum, and stainless steel.