Walter SST Core Cutter 1-1/4 Inch Diameter x 2 Inch Depth

Technical Analysis: Walter 05A404 SST Core Cutter

The Walter 05A404 SST Corecut represents a significant advancement in annular cutter design, specifically engineered for industrial MRO and heavy fabrication environments. This 1-1/4" diameter cutter with a 2" depth of cut utilizes a high-speed steel substrate enhanced by a specialized bronze SST (Super Speed Tip) surface treatment. Unlike standard oxide coatings, this bronze treatment provides a lower coefficient of friction, which is crucial when drilling deep holes in gummy materials like aluminum or work-hardening alloys like stainless steel. The reduction in frictional heat preserves the temper of the cutting edge and prevents premature failure due to thermal shock.

Structurally, the cutter features fully ground, extra-large flutes. In deep hole drilling (up to 2 inches), chip evacuation is often the limiting factor for feed rates. If chips pack inside the flutes, catastrophic tool failure can occur. Walter's flute geometry maximizes the space available for chip flow, allowing for higher feed rates without the risk of clogging. The modern tooth design is optimized for efficient shearing action, breaking chips into manageable sizes that are easily ejected. This geometry also contributes to the tool's ability to produce a surface finish that is virtually free of porosity and irregularities.

The universal shank design ensures broad compatibility with major magnetic drill press brands, including those utilizing Weldon flat systems and quick-change arbors. This eliminates the need for specialized adapters in mixed-fleet environments. For optimal performance, this cutter should be used in conjunction with high-quality cutting lubricants, such as Walter's ICECUT or COOLCUT fluids, to further manage thermal loads and extend the life of the bronze coating. The 05A404 is an ideal solution for structural steel erection, pipe flange fabrication, and general maintenance where large diameter holes must be produced on-site with portable magnetic drills.

Technical Specifications & Operational Notes:

• Diameter: 1-1/4 inches
• Depth Capacity: 2 inches
• Material Suitability: Optimized for Stainless Steel, Steel, and Aluminum.
• Surface Treatment: Bronze SST for friction reduction.
• Shank: Universal fit for magnetic drills.
• Maintenance: Keep flutes clean; use appropriate coolant flow.