Walter SST Cobalt Stub Drill Bit - Wire Gauge #23

Precision Engineering: Walter 01J023 Cobalt Stub Drill

The Walter 01J023 SST Stub Drill represents the pinnacle of drilling technology for industrial MRO and fabrication environments. Engineered for heavy-duty performance, this #23 wire gauge drill bit (0.1540 inch diameter) is specifically optimized for machining materials with high tensile strength, including 300 and 400 series stainless steels. The core of its performance lies in its substrate: a premium cobalt blend that maintains cutting edge hardness at elevated temperatures where conventional HSS bits would fail. This thermal stability is critical for maintaining hole tolerance and surface finish in hard alloys.

Structurally, the bit features a "stub" or screw machine length profile. In engineering terms, reducing the length of the column (the drill bit) significantly increases its resistance to buckling and deflection. This rigidity is essential when using hand-held power tools, where off-axis forces often lead to premature tool failure. The short flutes also provide a more robust web construction, allowing for higher feed rates and aggressive cutting action without compromising the structural integrity of the tool. This makes the 01J023 an excellent choice for high-throughput sheet metal operations.

Surface tribology is addressed through Walter's proprietary bronze SST surface treatment. This coating serves a dual purpose: it acts as a solid lubricant to lower the coefficient of friction between the tool and the workpiece, and it creates a thermal barrier that directs heat away from the cutting interface and into the chip. Combined with a 135-degree split point geometry that reduces thrust load requirements, this drill bit offers exceptional efficiency. It effectively eliminates the need for center punching in many applications and ensures round, burr-free holes in thin-gauge materials.

Technical Specifications:

• Substrate: High-performance Cobalt Blend.
• Geometry: Stub / Screw Machine Length with Split Point.
• Surface Finish: Bronze SST (Super Speed Treatment).
• Application Range: Stainless steel, mild steel, non-ferrous metals, and sheet metal.