Starrett 65640 Carbide Tipped Hole Saw 4-3/8 in

Product Description

The STARRETT 65640 is a carbide-tipped hole saw designed for cutting through hard and abrasive materials that would quickly dull standard bi-metal blades. With a 4-3/8 inch saw diameter and a 1-5/8 inch cutting depth, this saw handles applications where consistent bite and edge retention are critical. The toothed cutting edge runs at a constant pitch pattern, producing clean, repeatable cuts. It is used by trade professionals and skilled DIYers working on projects that involve fiberglass, masonry brick, plaster, MDF, Formica, and suspended flooring. The non-arbored design means an appropriate arbor must be selected separately to match the drill chuck in use.

This hole saw is suited for residential and commercial installation work where penetrations through composite, masonry, or laminated panel materials are required. Electricians, HVAC technicians, and plumbers cutting through walls, ceilings, or flooring panels made of plaster, MDF, or fiberglass will find the 4-3/8 inch diameter appropriate for standard duct knockouts, pipe penetrations, and access openings. The carbide-tipped construction extends tool life significantly compared to standard steel hole saws when working in abrasive material categories.

Key Features

• 4-3/8 inch saw diameter for standard to large-diameter penetrations
• 1-5/8 inch cutting depth handles typical panel and wall material thicknesses
• Carbide-tipped construction resists wear in fiberglass, masonry, plaster, and composite materials
• Constant pitch toothed edge delivers consistent cut quality throughout the stroke
• Non-arbored design — pairs with a compatible arbor selected for the application

Compatibility

Rated for use in fiberglass, Formica, masonry brick, MDF, plaster, and suspended floor materials. Not arbored — requires a separately sourced compatible arbor sized for this hole saw.

Installation Notes

Installation should be performed by qualified tradespeople following applicable safety practices for rotary cutting tools. Ensure the drill or drill press is set to an appropriate speed for the material being cut, as excessive RPM in masonry or carbide applications can reduce tool life and create hazardous conditions. Always secure the workpiece before cutting and wear appropriate eye and respiratory protection when cutting abrasive materials such as masonry or fiberglass. Select and properly seat the arbor before mounting the saw in the tool.