Starrett 65633 Hole Saw 3-3/8 in Carbide Tipped

Product Description

The STARRETT 65633 is a carbide-tipped hole saw designed for cutting through demanding materials that quickly wear down standard bi-metal blades. With a 3-3/8 inch saw diameter and a 1-5/8 inch cutting depth, this saw handles full-depth cuts through thick substrates including fiberglass, masonry brick, MDF, plaster, Formica, and suspended flooring. The toothed cutting edge with a constant pitch pattern delivers consistent chip clearance and reduces vibration during the cut. It is used by HVAC technicians, electricians, plumbers, and general contractors who routinely work with abrasive or composite materials.

This hole saw is well-suited for trade applications involving penetrations through fiberglass duct board, plaster walls, masonry brick, MDF panels, and Formica surfaces. The 3-3/8 inch diameter makes it a practical choice for cutting openings sized for standard pipe, conduit, or duct fittings. The carbide-tipped construction is particularly valued in situations where a single cut through an abrasive substrate would destroy a standard steel blade. Licensed trades across HVAC, plumbing, and electrical regularly use this size for rough-in and finish penetration work.

Key Features

• Carbide-tipped cutting edge resists wear on abrasive materials including masonry brick and fiberglass
• 3-3/8 inch saw diameter suits standard pipe, conduit, and fitting penetration sizes
• 1-5/8 inch cutting depth handles thick panels, walls, and flooring substrates in a single pass
• Constant pitch tooth pattern provides smooth, consistent chip clearance throughout the cut
• Rated for fiberglass, Formica, masonry brick, MDF, plaster, and suspended floor applications
• Non-arbored design allows use with compatible arbor/mandrel systems selected by the installer

Compatibility

Designed for use with separately sourced arbors and mandrels compatible with standard hole saw shanks. Suitable for use on fiberglass, Formica, masonry brick, MDF, plaster, and suspended floor materials as specified by the manufacturer.

Installation Notes

This hole saw requires a compatible arbor or mandrel before mounting in a drill or drill press — the 65633 is non-arbored and does not include an arbor. Secure the workpiece before drilling and use appropriate RPM settings for the material being cut, as abrasive substrates like masonry and fiberglass generate significant heat. Wear eye and respiratory protection when cutting MDF, fiberglass, or plaster, as these materials produce fine particulate. Follow applicable OSHA and local safety codes for rotary cutting tools on job sites.