Milwaukee 49-56-0072 Bi-metal Hole Saw 1-3/8 Inches

Product Description

The MILWAUKEE ELECTRIC TOOL CORP 49-56-0072 is a 1-3/8 inch bi-metal hole saw designed for general purpose cutting across metal, wood, and composite materials. It features a 3.5 TPI tooth geometry engineered to extend tooth life in metal applications. A thermoset coating reduces friction during the cut, which translates to faster cutting speeds and improved performance when running on cordless tools. The all-access slots built into the body address one of the most common field complaints: plug removal. The same slots improve pilot bit visibility for accurate hole placement and accelerate chip ejection to keep the cut zone cooler during use. Licensed HVAC techs, electricians, and plumbers reach for this saw when cutting through panels, enclosures, and pipe penetrations.

This hole saw is suited for residential and commercial trade applications where repeatable, clean holes are required in metal, wood, plastic, and similar general-purpose substrates. The 3.5 TPI design is particularly effective in thinner gauge metal, making it a practical choice for electrical box knockouts, conduit penetrations, and HVAC sheet metal work. The thermoset coating is optimized for cordless drill and driver platforms, and the manufacturer rates it at 25% more holes per battery charge compared to uncoated designs. Packaged individually, it fits into standard bi-metal hole saw arbor systems.

Key Features

• 3.5 TPI tooth design engineered for extended life in metal cutting applications
• All-access slots for fast plug removal and reduced downtime between holes
• Thermoset coating optimized for cordless tool platforms, rated at 25% more holes per charge
• Improved pilot bit visibility through redesigned slot geometry for accurate hole placement
• Accelerated chip ejection keeps the cut cool during extended use
• Compatible with Arbor TV 138-923 and Arbor TV 139-793

Compatibility

Compatible with Arbor TV 138-923 and Arbor TV 139-793 as stated by the manufacturer.

Installation Notes

Installation is performed by licensed electricians, plumbers, or HVAC technicians depending on the application. Always de-energize electrical panels and shut off relevant services before cutting into live systems or enclosures. Use a variable-speed drill or driver; start at low speed to seat the pilot bit before increasing RPM. Follow applicable NEC or IFGC guidelines for penetration sealing and fire-stopping where required.

Technical Specifications

• Cutting Diameter: 1-3/8 inches
• Tooth Design: 3.5 TPI bi-metal
• Coating: Thermoset
• Weight: 5.85 pounds
• Unit of Measure: EA
• Package Quantity: 24

Standard Information

• Brand: MILWAUKEE ELECTRIC TOOL CORP
• Manufacturer Part Number: 49-56-0072