01R229 - Walter SST+ 29/64" Drill Bit, 3/8" Reduced Shank, 135° Split Point

Technical Overview of the Walter SST+ 29/64" Drill Bit

The Walter 01R229 is a high-performance engineering tool designed to bridge the gap between portable drill capacity and heavy-duty hole requirements. Part of the renowned SST+ series, this drill bit features a specific 29/64-inch diameter cutting head integrated with a reduced 3/8-inch shank. This configuration allows operators to utilize standard 3/8-inch chuck power drills to create holes that would typically require a larger, heavier 1/2-inch drill motor. This versatility makes it an essential component in maintenance, repair, and operations (MRO) environments where tool portability is critical.

Technically, the bit is manufactured using Walter's proprietary SST+ geometry. This involves a high-speed steel formulation enriched with a cobalt blend, providing the thermal stability necessary to machine high-tensile materials such as stainless steel and other ferrous alloys. The bit is ground to a precise 135° split point. Unlike standard 118° chisel points, the 135° split point engages the material immediately upon contact, effectively eliminating "walking" or skating across the workpiece surface. This self-centering capability significantly improves hole accuracy and reduces the axial force required by the operator, thereby reducing fatigue during repetitive drilling tasks.

The flute design of the 01R229 is optimized for rapid chip evacuation, a critical factor when drilling deep holes in gummy materials like aluminum or work-hardening alloys like stainless steel. The bronze surface treatment further aids in reducing friction coefficient, keeping the cutting edge cooler and extending the tool's service life. Whether utilized in a stationary drill press or a handheld power tool, this bit delivers consistent, round holes with minimal burr formation.

Key Technical Specifications:

• Diameter: 29/64 inch
• Shank Configuration: 3/8 inch Reduced Shank
• Point Geometry: 135° Split Point (Self-Centering)
• Material Suitability: Stainless Steel, Mild Steel, Aluminum, Non-Ferrous Alloys