Hole saw M.K. Morse Advanced Bi-Metal 19 mm (3/4") — bi-metal hole saw for metal and wood

Bi-metal hole saw M.K. Morse Advanced Bi-Metal, 19 mm (3/4") diameter, is designed for cutting clean circular holes in metal, wood and mixed materials. The tool combines high-speed steel cutting teeth with a flexible alloy backing to provide a balance of cutting performance and resistance to tooth breakage. Its 19 mm size is suitable for creating through-holes in sheet metal, pipes, door panels and other surfaces where a precise round opening is required.

Advantages

This bi-metal hole saw offers durable cutting edges due to high-speed steel teeth welded to a flexible body, which improves resistance to chipping and extends tool life compared with standard carbon-steel saws. The construction supports efficient chip evacuation and reduces binding during cutting. The compact 19 mm diameter enables accurate holes with minimal material wastage and is compatible with common arbor systems for easy mounting and replacement.

Suitable for

• Cutting through thin and medium-thickness sheet metal
• Making circular openings in wood and wood-based panels
• Creating passage holes for cables and pipes
• Installing fittings in doors, cabinets and panels

Key specifications

• Diameter: 19 mm (3/4")
• Material: bi-metal (high-speed steel teeth on flexible alloy backing)
• Suitable materials: metal, wood, mixed materials
• Cut type: through-hole, circular
• Compatibility: fits common hole saw arbors/drills

How to use

Secure the hole saw to a compatible arbor and tighten according to the arbor manufacturer's instructions. Mark the center of the desired hole and, if appropriate, drill a pilot hole or use the arbor pilot bit to guide the saw. Use steady, moderate feed pressure and appropriate rotational speed for the material: lower speeds for metal, higher speeds for wood. Apply cutting lubricant on metal when cutting steel or stainless steel to reduce heat and prolong blade life. After completing the cut, back the saw out slowly to clear chips and inspect the cut edge for burrs; deburr if necessary.

Usage recommendations

For best results when cutting metal, use a cutting lubricant and maintain low-to-moderate speed to minimize heat buildup. Wear appropriate personal protective equipment, secure the workpiece firmly, and clear chips frequently to prevent clogging and to extend tool life.