Hole Saw bi-metal M.K. Morse 73 mm x 2 (7/8") MORSE-PTA-MHS46

The Hole Saw bi-metal M.K. Morse 73 mm x 2 (7/8") is a bi-metal hole cutter designed for making clean circular cuts in a range of materials. With a 73 mm cutting diameter and 2 mm wall thickness, this hole saw balances strength and cutting clearance for through-holes and recesses. Its bi-metal construction combines high-speed steel cutting edges with a flexible backing steel, giving increased wear resistance and toughness for repeated drilling operations when mounted on compatible drill arbors or power drills.

Advantages

Bi-metal construction provides a durable cutting edge and resistance to heat and wear during prolonged use. The 73 mm diameter is suitable for common openings while the 2 mm wall thickness offers a compromise between rigidity and chip evacuation. Compatibility with standard arbors and drill drivers allows use across metalworking, plumbing and electrical tasks. The saw’s geometry is designed to reduce vibration and improve cutting stability in a variety of materials.

Suitable for

• Cutting circular openings in thin to medium-thickness metals (steel, stainless steel, non-ferrous metals)
• Creating holes in wood and composite panels for pipe and cable passage
• Electrical box and conduit installation requiring precise round holes
• Plumbing applications where pipe collars or fittings require accurate bore holes
• General construction and maintenance tasks involving through-holes

Key specifications

• Cutting diameter: 73 mm (approximately 2.87 inches)
• Wall thickness: 2 mm
• Material: bi-metal (high-speed steel teeth bonded to flexible backing steel)
• Intended mounting: compatible with standard drill arbors and drill drivers
• Suitable materials: carbon steel, stainless steel, non-ferrous metals, wood, plastics and composite panels

How to use

Secure the hole saw to an appropriate arbor and pilot drill bit, then mount the assembly in a drill or drill press rated for the intended material. Mark the center of the intended hole, position the pilot bit, and start drilling at low speed to establish the cut. Apply steady, moderate pressure and increase speed as the cut progresses, using cutting fluid when working with metals to reduce heat and extend tool life. Periodically withdraw the saw to clear chips and prevent clogging. After completing the cut, remove the workpiece and deburr the hole edges as needed.

Usage recommendations

For best results when cutting metal, use appropriate cutting fluid, maintain controlled speed and feed, and ensure secure clamping of the workpiece. Inspect the saw for wear before each use and replace if teeth show significant dulling or damage.