Hole Saw for Metal MILWAUKEE A113MO10051 51 mm Bimetal

The MILWAUKEE 51 mm bimetal hole saw is designed for cutting precise round openings in thin to medium-thickness metal sheets. Constructed with high-speed steel teeth welded to a flexible backing, this hole saw balances cutting performance with resistance to heat and wear. It is intended for use with drills or compatible hole saw arbors to create openings for cables, pipes and conduit in metal panels and enclosures.

Advantages

The bimetal construction provides improved durability compared with simple stamped teeth, while the high-speed steel cutting edge maintains sharpness when cutting ferrous and non-ferrous metals. The flexible backing reduces the risk of tooth breakage under load and helps absorb shock during plunge cutting. The 51 mm diameter offers a common opening size for electrical and plumbing penetrations, and the saw’s geometry is optimized for smooth cutting with reduced burr formation.

Suitable for

• Creating cable and conduit entries in metal electrical boxes and panels
• Cutting holes for pipes and fittings in thin to medium-gauge sheet metal
• Installing ventilation or sensor openings in metal enclosures
• General metal fabrication tasks requiring 51 mm circular cutouts

Key specifications

• Cutting diameter: 51 mm
• Material: bimetal (high-speed steel teeth with flexible backing)
• Suitable workpiece thickness: thin to medium-thickness metal sheets
• Intended use: for drilling with compatible drills or hole saw arbors
• Typical applications: ferrous and non-ferrous metals

How to use

Mount the hole saw on a compatible arbor and secure it to a drill with adequate torque capacity. Mark the center of the desired opening and, if possible, drill a pilot hole to guide the arbor. Start drilling at low speed to establish the cut and increase speed as needed, applying steady axial pressure. Use cutting fluid or lubricant when cutting thicker or harder metals to reduce heat and prolong tool life. Clear metal chips periodically to prevent clogging and allow the hole saw to cut efficiently.

Usage recommendations

Use appropriate personal protective equipment including eye protection and gloves. Match drill speed and feed to the metal thickness and type; reduce speed for stainless steel and thicker materials. Ensure the arbor and pilot bit are compatible and in good condition before use to maintain concentricity and extend the life of the hole saw.