Hougen 12421 Annular Cutter 0.8268 in Hss Weldon

Product Description

The HOUGEN 12421 is a high speed steel annular cutter designed for clean, fast hole-cutting in mild steel and general steel stock. Unlike twist drills, an annular cutter removes only a core of material at the perimeter of the hole, reducing heat buildup and extending tool life. The cutter measures 0.8268 inches in diameter and reaches a cutting depth of approximately 1.969 inches (50 mm). The 3/4-inch Weldon flat shank with two flats provides a positive, slip-resistant connection in compatible magnetic drill press chucks. The bright, uncoated finish is standard for high speed steel tooling in light to medium-duty applications.

This cutter is suited for steel fabrication, structural work, and maintenance applications where accurately sized holes are required in mild or low-carbon steel. It is a common choice for ironworkers, pipefitters, fabricators, and maintenance mechanics using magnetic base drills or drill press setups equipped with a Weldon-style chuck. Typical use cases include punching clean holes in plate steel, angle iron, tube steel, and structural channel without the need for a pilot hole in many setups.

Key Features

• 0.8268-inch (21 mm) cutting diameter for precise, consistent hole sizing
• High speed steel construction handles mild steel and general steel stock
• Cutting depth of 1.969 inches (50 mm) accommodates thick plate and structural sections
• 3/4-inch Weldon flat shank with 2 flats locks securely in Weldon-compatible chucks
• Bright/uncoated finish — no coating to chip or peel under heavy use
• Annular cutting geometry removes less material than a twist drill, reducing cycle time and heat

Compatibility

Designed for use with magnetic base drills and drill presses equipped with a 3/4-inch Weldon flat shank chuck. Rated for material applications including mild steel and general steel stock.

Installation Notes

Installation and operation should be performed by qualified fabricators or mechanics familiar with rotary cutting tools and magnetic drill equipment. Before mounting the cutter, ensure the drill is powered off and the chuck is fully secured around both Weldon flats to prevent rotation under load. Use cutting fluid or a cutting oil appropriate for high speed steel tooling on steel stock to manage heat and extend cutter life. Always secure the workpiece before engaging the magnetic base and beginning the cut.