Irwin 373134BX Bi-metal Hole Saw 1-3/4 Inch

Product Description

The IRWIN 373134BX is a bi-metal hole saw with a 1-3/4 inch diameter cutting capacity. It is built for trade use across multiple materials, including wood, aluminum, copper, iron, stainless steel, and zinc. The bi-metal construction combines a high-speed steel cutting edge with a flexible alloy steel body, which resists breakage under the stress of repeated use. Electricians, plumbers, and HVAC technicians rely on this saw size for conduit knockouts, pipe penetrations, and duct openings. It operates at a maximum of 195 RPM for controlled, clean cuts in harder materials.

This hole saw is suited for both residential and light commercial work. Common applications include drilling through wall framing, metal junction boxes, copper pipe flanges, and sheet aluminum. The 1-3/4 inch diameter is a frequently used size for low-voltage wiring pass-throughs, small conduit entries, and PVC drain line penetrations. It fits standard arbors used with most handheld and drill press setups found on service trucks and job sites.

Key Features

• Bi-metal construction cuts wood, aluminum, copper, iron, stainless steel, and zinc
• 1-3/4 inch diameter for conduit knockouts, pipe penetrations, and pass-throughs
• 195 RPM maximum operating speed for controlled cuts in metal
• Flexible alloy steel body resists cracking and breakage under load
• Compatible with standard arbor systems used across trade applications

Compatibility

Designed as an OEM-style replacement and standard trade hole saw fitting universal arbor systems compatible with 1-3/4 inch bi-metal hole saws.

Installation Notes

Install using a compatible arbor and a variable-speed drill or drill press. Secure the workpiece before cutting and keep the RPM at or below 195 when cutting metal. Wear appropriate eye and hand protection. Reduce feed pressure near breakthrough to avoid grabbing or binding in thin materials.