01C521 - Walter Letter "U" Sst Drill Bit

Walter SST+ Letter "U" Cobalt Drill Bit for Fabricators

For professional welders and metal fabricators, time is money, and a dull drill bit is a production bottleneck. The Walter 01C521 Letter "U" SST+ Drill Bit is built to handle the rigorous demands of the welding shop, offering unmatched speed and durability. When fabricating structural components or preparing custom parts, you often encounter a variety of materials ranging from aluminum to hardened stainless steel. The SST+ series is formulated with a high-grade cobalt blend that excels in these mixed-metal environments, cutting through hard alloys that would destroy a standard black oxide bit in seconds.

The geometry of the 01C521 is what truly sets it apart in a fabrication setting. The bit features a heavy-duty, fully ground body with a back taper. This design detail is critical; it slightly reduces the diameter of the bit behind the cutting tip, which significantly reduces friction against the hole walls. This means less heat generation and virtually no binding, allowing you to drill deeper holes with confidence. The "Speed Tip" is another favorite feature among welders—it bites into the metal instantly upon contact. This eliminates the annoying skating effect and ensures your holes are exactly where you marked them, preserving the integrity of your layout.

With a diameter of 0.3680 inches (Letter U), this bit is a specific size often required for precise bolt clearances or tap drills. The bronze SST surface treatment acts as a lubricant and heat shield, further extending the life of the bit. Whether you are drilling out broken bolts, preparing frames for assembly, or creating weep holes in tubing, the Walter SST+ provides the aggressive cutting action and reliability needed to keep your projects moving forward. It is compatible with both cordless power tools and stationary drill presses, making it a versatile addition to any welder's toolbox.

Fabrication Advantages

• Aggressive Cutting: Cuts through stainless steel and hard alloys with ease.
• No Center Punch Needed: Speed Tip bites instantly for faster workflow.
• Reduced Breakage: Robust core and back tapered design withstand torque.
• Heat Management: High-flow flutes clear hot chips quickly to protect the temper.