Greenlee 645-1-1/8 Quick-Change Carbide-Tipped Hole Cutter – 1-1/8 Inch Stainless Steel Metal Cutting Hole Saw

Overview

Meet the Greenlee 645-1-1/8 Quick-Change Carbide-Tipped Hole Cutter, a tool built for speed and precision on demanding metalwork and plumbing tasks. The 1-1/8 inch cutter is designed to produce clean, round holes for 3/4 inch conduit, cutting through stainless steel, mild steel, aluminum, brass, fiberglass, and plastics with minimal effort and no oil required.

Key benefits at a glance

• Burr-free, accurately sized holes thanks to precision tungsten carbide teeth.
• Versatile cutting across multiple materials, including stainless steel, with long-lasting durability.
• No oil needed, reducing mess and maintenance on the job site.
• Easy tool changes with a push-and-turn quick-change arbor, maximizing time on task.
• Replaceable cobalt steel pilot drill with a step design for smoother starts and less resistance.
• Flange stop prevents over-drilling, while slug ejector helps remove cutouts quickly.

In the field

Real-world drilling tasks benefit from a setup that stays sharp and aligned. The quick-change feature allows you to switch between cutter sizes without re-chucking, so you can adapt on the job as conduit diameters or panel thickness change. The slug ejector and flange stop contribute to cleaner holes and less drill retreat time in tight spaces.

Durability and design

The core of the tool is a carbide-tipped cutter with a replaceable cobalt steel pilot drill. The split-point tip helps prevent walking when you start the cut, and the step design reduces required force for metal cutting, resulting in smoother operation and less hand fatigue over long jobs.

How to use (highlights)

1. Attach the 1-1/8 inch cutter to the quick-change arbor with a simple push and turn.
2. Position over the mark and begin; the pilot drill helps locate the bore while the carbide teeth cut.
3. Finish the cut, using the slug ejector to clear the piece and the flange stop to prevent over-drilling.

What’s included and compatibility

The system uses a single arbor for multiple cutter heads, and a range of removable heads is available from 5/8 inch to 3 inch. This enables quick adaptation if you need other hole sizes on the same job.