Greenlee 730PBB-3-34 Round Pun...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,112.46
Greenlee 730PBB-3-34 Round Punch Unit, 3-3/4"

Greenlee 730PBB-3-34 Round Punch Unit, 3-3/4"

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Model: 730PBB-3-3/4

In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,112.46
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Greenlee 730PBB-3-34 Round Punch Unit, 3-3/4"

The Greenlee 730PBB-3-34 Round Punch Unit is a complete standard round metal punch unit sized at 3-3/4 In, built for electricians and panel fabricators who need clean, fast, and accurate holes in enclosures and equipment housings. Each unit ships as a full assembly consisting of punch, die, and draw stud, so there is no need to source components separately — simply assemble the unit through a properly sized pilot hole and drive it through the workpiece. This round punch unit is designed to work with battery-powered, hydraulic, ratchet, or manual drivers, giving crews flexibility to match the tool to the job at hand, whether that is a bench-mounted hydraulic press or a portable manual driver used in the field. Manufactured in the United States, the 730PBB-3-34 is engineered to punch mild steel, aluminum, fiberglass, and plastic, making it a versatile addition to any panel-building or enclosure-fabrication toolkit.

Key Features

  • Trade Size: 3-3/4 In round punch for standard enclosure and panel penetrations.
  • Complete Assembly: Includes punch, die, and draw stud as one ready-to-use unit — no separate components to source or match.
  • Round Shape: Standard round profile produces a clean, consistent hole suitable for conduit, fittings, and hardware installation.
  • Driver Versatility: Compatible with battery-powered, hydraulic, ratchet, or manual drivers for use across a range of job-site setups.
  • Multi-Material Punching: Rated for mild steel, aluminum, fiberglass, and plastic, covering the most common enclosure materials.
  • Pilot-Hole Assembly: When properly assembled through a pilot hole, the unit produces clean, fast, and accurate holes with minimal burring.

Technical Specifications

  • Country of Origin: United States
  • Size: 3-3/4 In
  • Type: Standard round punch unit
  • Shape: Round

Typical Applications

  • Electrical Panel and Enclosure Fabrication
  • Punching Mild Steel and Aluminum Cabinets
  • Fiberglass and Plastic Enclosure Modification
  • Conduit Entry and Hardware Mounting Holes
  • Field and Bench Panel-Building Work

Why Greenlee?

Greenlee's round punch units are engineered as complete, ready-to-assemble kits so electricians and panel builders get clean, accurate holes without sourcing mismatched components. Made in the United States and rated to punch mild steel, aluminum, fiberglass, and plastic, the 730PBB-3-34 delivers the reliable, code-ready performance professionals expect from Greenlee's metalworking tool line.

Manufacturer Resources

Product Specs

list_batch:
GREE-20260923
Product Type:
Knockout Punch
Configuration:
Round
Country Of Origin:
United States
Department:
Electrical
Product Subgroup:
Electrical Installation Tools
Product Size:
3-3/4"
Product Group:
Jobsite Supplies

Greenlee 730PBB-3-3/4 – Frequently Asked Questions

1) What comes in the Greenlee 730PBB-3-34 punch unit, or do I have to buy the die and draw stud separately?
The 730PBB-3-34 ships as a complete assembly: punch, die, and draw stud in one unit. Nothing else has to be matched or sourced to make the hole, though you do need a driver and you have to drill a pilot hole for the draw stud first.
2) Can I use this Greenlee round punch with a battery hydraulic driver, or does it need a manual ratchet?
Either works. The 730PBB-3-34 is built to be driven by battery-powered, hydraulic, ratchet, or manual drivers, so you can run it off a bench hydraulic press or a hand ratchet wrench in the field. At 3-3/4 inches, a powered driver will save a lot of effort in steel.
3) Will this punch go through stainless steel enclosures?
No. The 730PBB-3-34 is rated for mild steel, aluminum, fiberglass, and plastic. Stainless is not among the materials it is rated to punch, so for stainless cabinets you need a punch unit specifically rated for it.
4) What size hole does the Greenlee 730PBB-3-3/4 punch make?
It cuts a 3-3/4 inch round hole. That is the trade size of the unit, used for large conduit entries and equipment penetrations in panels and enclosures.
5) Is the Greenlee 730PBB-3-3/4 punch unit made in the USA for federal or Buy American jobs?
Country of origin is the United States. That matters to government and institutional buyers working under domestic-sourcing requirements, and the manufacturer part number to put on the submittal is 730PBB-3-3/4.
6) Do I need to drill a pilot hole before using this knockout punch?
Yes. The draw stud passes through a pilot hole in the workpiece, then the punch and die are drawn together to shear the slug. Assembled properly through a correctly sized pilot hole, the 3-3/4 inch unit gives a clean hole with minimal burring.
7) What is the exact part number to order a Greenlee 3-3/4 inch round knockout punch?
Order Greenlee 730PBB-3-3/4, a standard round punch unit in the 730 series. Distributors should note the 730PBB designation covers the complete punch, die, and draw stud assembly rather than a loose punch half.
How fast can I get the Greenlee 730PBB-3-3/4 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 730PBB-3-3/4 come with a warranty?
Absolutely. The Greenlee 730PBB-3-3/4 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 730PBB-3-3/4?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Greenlee 730PBB-3-3/4 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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