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Irwin 373 Series WELDTEC Bi-Metal Hole Saw
The Irwin 373 Series Bi-Metal Hole Saw is engineered to help pros get more done on the jobsite, delivering fast, clean cuts through the materials encountered in everyday electrical, plumbing, and construction work. Built with heavy-duty bi-metal construction and Irwin's WELDTEC variable tooth design, this hole saw series runs quieter while cutting more efficiently, and it is offered across 14 diameters within the 373 Series lineup to match a wide range of hole-cutting applications. Variable depth gullets keep chip removal quick and friction low, so every saw in the series stays cooler and cuts longer between tooth changes.
Key Features
- Trade Size: Offered across the 373 Series lineup in multiple diameters to match a wide range of hole-cutting applications.
- Durable Construction: Heavy-duty bi-metal construction for added toughness and long tool life across every size in the series.
- WELDTEC Variable Tooth Design: 4/6 variable pitch teeth reduce noise and improve overall cutting performance.
- Electron Beam Welded Teeth: Creates a stronger bond at the tooth base for longer-lasting, more reliable cutting edges.
- Variable Depth Gullets: Provide more efficient chip clearance with less friction for quicker, smoother cuts.
Technical Specifications
- Warranty: NLW
- Claims Needed: No
- Country of Origin: USA
- Battery Included: No
- Power Source: NON-ENERGY USING
Typical Applications
- Cutting Holes for Electrical Boxes and Conduit Penetrations
- Wood and Metal Fabrication
- Plumbing and Mechanical Rough-In Work
- Commercial and Residential Construction
- Renovation and Remodeling Projects
Why Irwin?
Irwin engineers the 373 Series bi-metal hole saws with electron-beam-welded teeth and a WELDTEC variable pitch tooth design to give tradespeople a lineup that cuts smoothly, runs quieter, and holds up to daily jobsite use across every diameter offered. The heavy-duty bi-metal construction is built for toughness and long service life, making the 373 Series a dependable choice for professionals who need consistent results size after size. Choose Irwin for hole saws engineered to keep pace with demanding electrical, mechanical, and construction work.
Manufacturer Resources
Product Specs
- Warranty:
- NLW
- Claims Needed:
- No
- Individual Vs. Set (Syndigo):
- INDIVIDUAL
- Product Material Group:
- METAL
- Country Of Origin:
- United States
- Battery Included:
- No
- Product Primary Material:
- Bi-Metal
- Power Source:
- NON-ENERGY USING
- list_batch:
- IRW-20260923
- Product Type:
- Hole Saw
- Series:
- 373 Series
- Configuration:
- Variable Tooth Design
- Department:
- Electrical
- Product Subgroup:
- Hole Saws & Bits
- Product Material:
- Bi-Metal
- Product Group:
- Power Tools & Accessories
Irwin 373114BX – Frequently Asked Questions
1) What sizes does the Irwin 373 Series WELDTEC bi-metal hole saw come in?
Fourteen diameters, from 3/4 in. up to 3-1/2 in.: 3/4, 7/8, 1, 1-1/8, 1-1/4, 1-3/8, 1-1/2, 1-3/4, 2, 2-1/8, 2-1/4, 2-1/2, 3 and 3-1/2 in. Each diameter is its own part number, for example 373034BX for the 3/4 in. and 373312BX for the 3-1/2 in.
2) Is the Irwin 373 hole saw sold individually or as a kit with arbor and pilot bit?
These are sold as individual saws, one cup per part number. No arbor, pilot drill, or carrying case is included, so if you don't already have a mandrel on the truck you need to order one separately along with a pilot bit.
3) Will an Irwin 373 bi-metal hole saw cut steel, or is it wood only?
Bi-metal construction means it handles both. The 373 Series is built for wood and metal fabrication, electrical box and conduit penetrations, and plumbing and mechanical rough-in, so sheet metal, studs and junction box knockouts are all in scope rather than wood alone.
4) Which Irwin 373 hole saw size do I need for 1/2 inch and 3/4 inch EMT conduit?
Pick the saw by the knockout diameter, not the trade size of the pipe. A 1/2 in. trade conduit connector takes a 7/8 in. hole and a 3/4 in. trade connector takes a 1-1/8 in. hole, which the series covers with the 373078BX and 373118BX. Larger runs are served up through 3-1/2 in.
5) What does WELDTEC variable tooth design actually do on a hole saw?
It's a 4/6 variable pitch tooth pattern instead of a single constant pitch. Mixing tooth spacing breaks up harmonics, so the saw runs noticeably quieter and chatters less when it bites. The teeth are electron beam welded at the base for a stronger bond, and variable depth gullets clear chips faster with less friction, which keeps the cup cooler on deep cuts.
6) Can I run these hole saws in a cordless drill, or do they need a special tool?
They're plain cutting tools with no power source of their own and no battery, so they run off whatever you chuck the arbor into: cordless drill, corded drill, or a mag drill. For the 3 in. and 3-1/2 in. cups, use a drill with a low gear and a side handle, since large diameters load up fast.
7) Where are Irwin 373 Series hole saws made?
Country of origin is the United States. That matters on public projects with domestic sourcing requirements, so the 373 Series is worth flagging to your procurement group if you're filling a Buy American tool line.
How fast can I get the Irwin 373114BX 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 Irwin 373114BX come with a warranty?
Absolutely. The Irwin 373114BX 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 Irwin 373114BX?
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installation tips, and troubleshooting. Contact Us
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