Milwaukee 49-57-4120 Annular Cutter 4-1/8 in Steel Hawg

Product Description

The MILWAUKEE 49-57-4120 is a threaded Steel Hawg annular cutter designed for high-speed hole cutting in ferrous and non-ferrous metals. Rated at 2 TPI with a 4-1/8 inch diameter, it cuts holes up to 2 inches deep in steel, stainless steel, cast iron, and aluminum. The cutter uses carbide teeth arranged in an alternating tooth form geometry, which reduces cutting resistance and extends tool life compared to standard high-speed steel cutters. A spring-loaded, self-ejecting pilot pin serves as both a centering pin during setup and a plug ejector after the cut is complete. Licensed electricians, ironworkers, and mechanical contractors use this tool with electromagnetic drill presses on structural and plate steel applications.

This annular cutter is suited for commercial and industrial applications where repetitive hole cutting in metal is required. Common install scenarios include bus bar drilling, structural steel fabrication, conduit knockout work, and mechanical equipment mounting. The 4-1/8 inch cutting diameter makes it well-suited for large-bore penetrations in steel plate. The M18 x 1.5 metric threaded shank interfaces directly with compatible mag drill arbors. Milwaukee specifies use with arbor 49-57-0030 on the Milwaukee 4262-1 magnetic drill press and arbor 49-57-0010 on the Milwaukee 4292-1 mag press. It is also compatible with a No. 3 Morse taper arbor assembly 49-57-0010.

Key Features

• Alternating tooth form geometry cuts steel up to 3 times faster than twist drill bits
• Carbide teeth resist abrasion and produce cleaner hole edges for longer cutter life
• Spring-loaded self-ejecting pilot pin doubles as centering pin and speeds plug removal
• M18 x 1.5 metric threaded shank for direct mount on compatible arbors
• 2 inch maximum cutting depth in steel, stainless steel, cast iron, and aluminum
• Compatible with most electromagnetic drill presses

Compatibility

Use with arbor 49-57-0030 on the Milwaukee 4262-1 magnetic drill press or arbor 49-57-0010 on the Milwaukee 4292-1 mag press. Also compatible with No. 3 Morse taper arbor assembly 49-57-0010. Fits most electromagnetic drill presses accepting an M18 x 1.5 threaded shank.

Installation Notes

Annular cutters of this type are installed and operated by qualified tradespeople familiar with magnetic drill press equipment. Before mounting or removing the cutter, ensure the mag drill is fully powered down and the magnet is disengaged. Secure the workpiece and verify the magnetic base has full contact with a flat, clean steel surface before beginning a cut. Always use a cutting fluid or lubricant appropriate for the base material to protect carbide tooth edges and extend cutter life.

Technical Specifications

• Cutting Diameter: 4-1/8 inches
• Cutting Depth: 2 inches
• Teeth Per Inch (TPI): 2
• Shank Thread Size: M18 x 1.5 metric
• Compatible Materials: Steel, stainless steel, cast iron, aluminum
• Package Length: 6.7 inches
• Package Width: 6.65 inches
• Package Height: 4.15 inches
• Weight: 2 pounds
• UOM: Each

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 49-57-4120