Hole saw Irwin 10504196 bi-metal 76 mm, variable tooth pitch 4.5/5.5 TPI

The Irwin 10504196 bi-metal hole saw, 76 mm diameter, is designed for creating clean circular openings in metal and other compatible materials. Engineered with a variable tooth pitch of 4.5/5.5 TPI, this hole saw balances fast material removal with controlled cutting to reduce vibration and improve hole quality. It is compatible with standard drill chucks and drill presses when used with the appropriate arbor and pilot bit, and is intended for trades and workshops that require accurate through-holes in thin to medium-thickness sheet metal and similar substrates.

Advantages

The bi-metal construction combines a high-speed steel cutting edge with a flexible alloy backing for extended life and resistance to tooth breakage. Variable tooth pitch improves chip clearance and reduces chatter for smoother cutting and longer tool life. The 76 mm diameter provides a common size for pipe penetrations and fixture mounting, while compatibility with standard drill equipment makes the saw versatile for on-site and workshop use.

Suitable for

• Drilling circular openings in steel sheet, stainless steel and non-ferrous metal sheets
• Creating holes for plumbing pipes and conduits
• Electrical installations and mounting junction boxes
• General metalworking and HVAC ductwork penetrations

Key specifications

• Cutting diameter: 76 mm
• Material: bi-metal construction (HSS teeth with alloy backing)
• Tooth pitch: variable 4.5/5.5 TPI for optimized cutting and chip evacuation
• Suitable application thickness: thin to medium sheet metals and similar materials
• Compatible with drills and drill presses using appropriate arbor and pilot bit

How to use

Secure the appropriate arbor and pilot bit in the drill, fit the hole saw onto the arbor, and tighten according to the arbor manufacturer's instructions. Mark the centre point of the intended hole on the workpiece and clamp the workpiece firmly to prevent movement. Start drilling at low speed to establish the pilot hole, then increase speed as appropriate for the material while applying steady axial pressure. Use cutting fluid when working with steel or stainless steel to reduce heat and prolong tool life. After cutting, remove the slug and deburr the hole as needed.

Usage recommendations

For best results, use the hole saw with a suitable arbor and pilot bit, maintain consistent feed pressure, and apply cutting fluid when cutting ferrous metals. Inspect teeth for wear before use and replace the saw when cutting becomes slow or the quality of holes degrades.