01J004 - Walter SST #4 Cobalt Stub Drill Bit for Sheet Metal

High-Performance Drilling for Sheet Metal

The Walter #4 SST Stub Drill (01J004) is a premium cutting tool engineered specifically for the demands of sheet metal fabrication and industrial maintenance. Unlike standard jobber-length bits, this stub drill features a shorter flute and overall length. This compact design significantly increases the rigidity of the bit, minimizing the flexing that often leads to breakage, especially when using portable power tools. For professionals working with thin-gauge materials, this added stability ensures cleaner, rounder holes and greater control during the drilling process.

Constructed from a high-grade cobalt blend, the SST Stub Drill is built to withstand the high temperatures generated when drilling tough alloys. The material composition extends the cutting life of the bit, making it an excellent choice for drilling stainless steel, mild steel, and non-ferrous metals. The bit features a specialized bronze SST surface treatment that helps reduce friction and heat buildup, further enhancing its durability and performance in repetitive drilling applications.

One of the standout features of this drill bit is its precision split point geometry. This design allows the bit to self-center immediately upon contact with the workpiece, eliminating the need for a center punch and preventing the bit from "walking" across the surface. This is particularly advantageous when drilling on curved surfaces or polished sheet metal where accuracy is paramount. Whether used in a stationary drill press or a handheld drill, the Walter 01J004 delivers consistent, professional results.