01W152 - Walter Multi-Step Reamer Bit 9/16-13/16 Inch for Heavy Plate

Precision Hole Enlargement for Heavy Plate

The Walter Surface Technologies 01W152 Multi-Step Reamer is a specialized cutting tool engineered to bridge the gap between standard step drills and industrial reamers. While traditional step bits are often limited to thin sheet metal applications due to their shallow step height, this Multi-Step Reamer is designed with a substantial 1/2-inch step thickness. This critical design feature allows the tool to drill through, enlarge, and deburr holes in metal plates up to 1/2 inch thick in a single pass. It is an indispensable asset for fabrication shops and industrial maintenance teams requiring precision and versatility.

Constructed from premium high-speed steel and engineered for durability, this tool covers a diameter range from 9/16" to 13/16" across five distinct steps. This range is particularly useful for standard bolt hole sizes found in structural steel and heavy machinery. The tool's geometry is optimized to cut through tough materials, including stainless steel, mild steel, and aluminum, maintaining a sharp edge even under rigorous use. The specialized flute design ensures efficient chip evacuation, reducing heat buildup and prolonging the life of the bit.

One of the most common challenges in drilling operations is bit slippage within the chuck, especially when applying the torque necessary to cut through thick plate. Walter has addressed this with a robust 3/8-inch shank featuring three flattened sides. This "tri-flat" shank design locks securely into standard drill chucks, ensuring maximum torque transmission without spinning or damaging the tool holder. Whether you are enlarging a pilot hole or correcting a misalignment in stacked assemblies, the 01W152 delivers consistent, chatter-free performance.

This tool serves a dual purpose: it functions as a drill for enlarging existing holes and as a reamer for aligning mismatched holes in overlapping materials. This capability makes it a superior alternative to carrying a heavy magnetic drill or a large index of twist drills. With the Walter Multi-Step Reamer, operators can achieve clean, accurate holes with the convenience of a portable power drill, significantly improving efficiency on the shop floor or in the field.