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The Walter 01M554 27/32" SST+ Prentice Drill Bit represents the pinnacle of drilling technology for industrial maintenance and fabrication. Designed to bridge the gap between large-diameter hole requirements and standard portable tooling, this bit features a "Prentice" style reduced shank. While the cutting diameter is a substantial 27/32 inches, the shank is precision-turned to 1/2 inch, allowing it to be used in a wide variety of drill presses, magnetic drills, and heavy-duty handheld power drills that are limited to a 1/2-inch chuck capacity.
Material composition is critical in high-torque applications, and Walter has engineered this bit using a proprietary cobalt blend. This high-speed steel formulation provides exceptional hot hardness, meaning the bit retains its cutting edge even when subjected to the extreme temperatures generated during heavy drilling in tensile materials like stainless steel. The addition of the exclusive bronze SST surface treatment further enhances performance by reducing surface friction and aiding in smooth chip evacuation, which is vital for maintaining hole accuracy and surface finish.
One of the most common failure points in large-diameter drilling is shank slippage, which can damage both the bit and the drill chuck. Walter addresses this with a secure 3-flat shank design. These ground flats allow the chuck jaws to seat firmly against the bit, ensuring positive torque transmission and completely eliminating rotation inside the chuck. Furthermore, the tip features a sophisticated self-centering geometry (typically a 135° split point) that bites into the material immediately upon contact. This eliminates the need for center punching or pilot drilling, significantly speeding up workflow in production environments.
The robust design of the SST+ tip is not only aggressive but also durable. It is engineered to drill more holes per sharpening than standard high-speed steel bits. When the time finally comes for maintenance, the bit's web thickness and flute geometry allow for easy re-sharpening, extending the total service life of the tool. Whether used for MRO tasks, structural steel fabrication, or automotive repair, the Walter 01M554 delivers consistent, professional results.
| Additional Information |
|---|
| Packaging Description:1 per each |
| Brand:Walter |
| Diameter (in):27/32" |
| Shank Size:1/2" |
| Shank Type:Prentice (Reduced) with 3 Flats |
| Material:Cobalt Blend |
| Point Angle:135° Split Point |
| Surface Treatment:Bronze SST |
