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Greenlee 1-3/8" Quick-Change Carbide-Tipped Hole Cutter with Split-Point Cobalt Pilot Drill
Professional precision cutting for metal fabrication and electrical applications
The Greenlee 1-3/8" Quick-Change Carbide-Tipped Hole Cutter delivers professional-grade performance for cutting clean, burr-free holes in stainless steel, mild steel, aluminum, copper, brass, fiberglass and plastics. Featuring tungsten carbide teeth optimized for maximum life and a split-point cobalt steel pilot drill with step design, this hole cutter provides fast, accurate metal cutting with less force required. The quick-change design allows switching between cutter sizes without re-chucking through a simple push and turn connection.
Professional Features & Benefits
- Tungsten Carbide Teeth: Optimized design delivers fast, easy cutting and maximum tool life in stainless steel applications without requiring oil lubrication.
- Split-Point Cobalt Steel Pilot Drill: Step design enables fast, accurate metal cutting with reduced force requirements for improved operator efficiency.
- Quick-Change Connection: Simple push and turn mechanism allows rapid switching between cutter sizes without re-chucking, maximizing productivity.
- Flange Stop Design: Eliminates over-drilling risk and ensures consistent hole depth for professional results.
- Slug Ejector Spring: Provides quick, easy slug removal for continuous operation and reduced downtime.
- Burr-Free Cutting: Produces clean, round holes that meet professional standards for electrical and fabrication work.
- Multi-Material Compatibility: Cuts stainless steel, mild steel, aluminum, copper, brass, fiberglass and plastics for versatile applications.
Technical Specifications
- Country Of Origin: China
- Cutting Edge: Tungsten Carbide Teeth
- Hole Size: 1-3/8" (34.9 mm) for 1" conduit
- Maximum Cutting Depth: 8 ga
- Pilot Drill: Replacement 645-001 sold separately
- Pilot Drill Size: 1/4" x 2-1/2" (6 mm x 64 mm)
- Product Type: Carbide-Tipped Hole Cutter
- Shank Size: 645-011 arbor sold separately (3/8" shank)
Professional Applications
- Electrical conduit installation and panel work
- HVAC ductwork and mechanical systems
- Metal fabrication and sheet metal work
- Plumbing and pipe fitting applications
- Industrial maintenance and repair
- Commercial construction projects
- Automotive and marine applications
Why Choose Greenlee Quality?
Greenlee delivers professional-grade tools engineered for durability and precision in demanding applications. The carbide-tipped construction and cobalt steel pilot drill provide extended tool life and consistent performance, while the quick-change design maximizes productivity for professional contractors and technicians.
Manufacturer Resources
Product Specs
- Pilot Drill:
- Replacement 645-001 sold separately
- Product Type:
- Carbide-Tipped Hole Cutter
- Country Of Origin:
- China
- Department:
- Electrical
- Shank Size:
- 645-011 arbor sold separately (3/8" shank)
- Cutting Edge:
- Tungsten Carbide Teeth
- Pilot Drill Size:
- 1/4" x 2-1/2" (6 mm x 64 mm)
- Product Subgroup:
- Hole Saws & Bits
Greenlee 645-1-1/8 – Frequently Asked Questions
1) Does the Greenlee 645 hole cutter come with an arbor, or do I need to buy that separately?
You need the arbor separately. The Greenlee 645 series carbide-tipped hole cutters mount on the 645-011 arbor, which has a 3/8 inch shank and is sold on its own. The cutter itself is just the cutting head, so first-time buyers ordering a 645 cutter alone will not be able to chuck it up. Once you have the arbor, the push-and-turn quick-change connection lets you swap between cutter sizes without re-chucking.
2) Is the pilot drill included with the Greenlee 645 carbide hole cutter?
The pilot drill is a replaceable wear part, ordered as Greenlee 645-001 and sold separately. It is a split-point cobalt steel drill measuring 1/4 inch by 2-1/2 inches (6 mm x 64 mm), with a step design that starts the hole with less feed pressure. Keep a spare on the truck, since the pilot typically dulls before the carbide teeth do.
3) What size hole do I need for 1 inch conduit?
For 1 inch conduit, use the 1-3/8 inch cutter (34.9 mm), which is the larger of the two sizes in the Greenlee 645 quick-change family. The other size offered is 1-1/8 inch. Both run on the same 645-011 arbor, so you can carry both heads and swap them without re-chucking.
4) How thick a panel can the Greenlee 645 hole cutter go through?
Maximum cutting depth is 8 gauge. That covers enclosure and panel sheet steel, HVAC duct, and typical strut or box walls, but it is not a cutter for structural plate. The flange stop behind the teeth limits how far the cutter can advance, so you cannot push it past its depth into thicker stock.
5) Will a carbide hole cutter cut stainless steel enclosures without cutting oil?
Yes. The tungsten carbide teeth on the Greenlee 645 cutters are made for stainless steel and do not require oil lubrication. They also handle mild steel, aluminum, copper, brass, fiberglass and plastics. Run steady moderate speed and let the carbide do the work rather than leaning on the drill.
6) Carbide hole cutter or a bi-metal hole saw for panel work?
For sheet metal and enclosure work the carbide-tipped cutter is the better tool: a shallow cutter body with carbide teeth cuts clean, round, burr-free holes fast and holds an edge in stainless, where bi-metal teeth wear quickly. A bi-metal hole saw is the choice when you need depth, since the Greenlee 645 is limited to 8 gauge material and cannot cut through thick stock or wood framing at any useful depth.
7) How do you get the slug out of the Greenlee 645 cutter between holes?
There is a slug ejector spring inside the cutter that pushes the plug out once you clear the hole, so you are not prying a disc out with a screwdriver on every knockout. That matters when you are cutting a row of holes in a panel and want to keep moving.
How fast can I get the Greenlee 645-1-1/8 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Greenlee 645-1-1/8 come with a warranty?
Absolutely. The Greenlee 645-1-1/8 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Greenlee 645-1-1/8?
You can call, text, or email our expert support team for fast answers. We’re here to help with
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selection,
installation tips, and troubleshooting. Contact Us
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