Starrett 00493 Hole Saw 1-3/8 in Hss Toothed Edge

Product Description

The STARRETT 00493 is a high speed steel hole saw designed for cutting clean, accurate holes in metal, steel, and wood. It features a toothed cutting edge with a constant pitch pattern at 5.5 teeth per inch, providing consistent material removal across a range of workpiece types. With a 1-3/8 inch saw diameter and a 1-5/8 inch cutting depth, it handles typical trade applications including conduit knockouts, pipe penetrations, and panel cutouts. Licensed electricians, plumbers, and pipefitters commonly reach for this size when boring through studs, sheet metal, or junction box blanks.

The 00493 is suited for both residential and light commercial work. Its 1-3/8 inch diameter is a commonly specified size for conduit entry holes and pipe rough-in penetrations. The high speed steel construction holds up to repeated use on metal substrates without the rapid edge degradation seen with bi-metal alternatives on softer materials. It is sold individually and fits standard arbors accepting this saw diameter.

Key Features

• 1-3/8 inch saw diameter for conduit, pipe, and panel cutout applications
• 1-5/8 inch cutting depth accommodates typical wall thickness and material stack-ups
• High speed steel construction for durability on metal, steel, and wood
• Constant pitch toothed edge at 5.5 TPI for consistent, controlled cutting
• Compact profile — 1.4 x 1.4 x 1.6 inches overall — fits confined work areas

Compatibility

Designed as an OEM-style replacement hole saw compatible with standard arbors accepting a 1-3/8 inch saw body. Suitable for cutting metal, steel, and wood as noted in the product specifications.

Installation Notes

Installation and use of this hole saw is typically performed by licensed electricians, plumbers, or pipefitters working under NEC or IPC guidelines. Always disconnect power or shut off fluid supply before cutting into live panels or pressurized assemblies. Secure the workpiece firmly before starting the cut, and use appropriate cutting fluid when boring through metal to extend saw life. Inspect the arbor connection before each use to confirm the saw is fully seated and locked.