Starrett 65638 Carbide Tipped Hole Saw 4-1/8 Inch

Product Description

The STARRETT 65638 is a carbide-tipped hole saw designed for cutting through hard and abrasive materials that standard bi-metal saws struggle to handle cleanly. With a 4-1/8 inch saw diameter and a 1-5/8 inch cutting depth, this saw covers a wide range of rough-in and retrofit applications. The toothed cutting edge and constant pitch pattern deliver consistent chip removal throughout the cut. Installers working in residential and light commercial environments will find this saw well-suited for penetrations through walls, floors, and structural panels where abrasive materials are present.

This hole saw is built for use on fiberglass, Formica, masonry brick, MDF, plaster, and suspended floor materials. It is a practical choice for HVAC technicians cutting duct and pipe penetrations through composite or masonry substrates, plumbers boring through MDF or plaster for drain and supply lines, and electricians running conduit or low-voltage cable through abrasive panel materials. The 4-1/8 inch diameter suits common trade rough-in sizes for piping, conduit, and access openings.

Key Features

• 4-1/8 inch saw diameter for large-bore penetrations
• 1-5/8 inch cutting depth accommodates standard wall and floor assemblies
• Carbide-tipped construction resists wear on abrasive materials
• Toothed cutting edge with constant pitch for smooth, consistent cuts
• Rated for fiberglass, masonry brick, MDF, plaster, Formica, and suspended floor materials
• Non-arbored design — requires a compatible arbor for use with a drill

Compatibility

Designed for use on fiberglass, Formica, masonry brick, MDF, plaster, and suspended floor substrates. This is a non-arbored saw and requires a separately sourced arbor sized for the 4-1/8 inch diameter.

Installation Notes

Installation should be performed by a qualified tradesperson familiar with rotary cutting tools and appropriate PPE for the substrate being cut. Secure the workpiece before drilling and use a center punch or pilot bit to prevent walking at the start of the cut. When cutting masonry or abrasive composites, reduce speed to extend carbide life and clear chips frequently. Because this saw is non-arbored, confirm arbor compatibility before use.