Knockout Punches & Dies

Knockout Punches and Dies: Precision Conduit Entry Solutions

Creating clean, burr-free openings in electrical panels and sheet metal requires specialized shearing tools. At Ohio Power Tool, we provide professional knockout punches and dies designed to deliver perfectly sized holes for conduit, cabling, and HVAC access points with minimal effort and maximum accuracy.

The Mechanics of a Clean Shear

A knockout system utilizes a high-torque shearing action rather than abrasive cutting. This ensures that no metal shavings enter sensitive electrical components. The system relies on three critical components:

• The Punch: The hardened steel cutting head featuring a precision-ground edge designed to penetrate the substrate.
• The Die: The matching base that supports the material and receives the punch, ensuring a clean break without deforming the surrounding metal.
• The Draw Stud: The high-tensile threaded rod that provides the mechanical leverage needed to pull the punch through the material.

Hydraulic vs. Manual Operation

Depending on the gauge of the material and the volume of holes required, professionals choose between two primary drive methods:

• Manual Knockouts: Utilizes a standard wrench or ratcheting handle to tighten the draw stud. Ideal for light-gauge steel and service work where portability is key.
• Hydraulic Knockout Kits: Uses a hand-operated or battery-powered hydraulic pump to provide tons of force instantly. These systems are essential for heavy-duty stainless steel and high-volume commercial electrical rough-ins.
• Slug-Splitting Technology: Our premium punch sets feature "slug-splitting" geometries that break the waste metal into two pieces, making them effortless to remove from the die.

Industry Applications

Knockout tools are the industry standard for trades requiring precise penetrations in finished enclosures:

• Electrical Panels & Junction Boxes: Creating standardized 1/2" to 4" openings for conduit fittings and cable glands.
• HVAC & Ductwork: Precision holes for refrigeration lines, thermostat wiring, and ventilation sensors.
• Industrial Fabrication: Customizing control consoles and sheet metal housings for manufacturing equipment.

Shop Professional Knockout Sets at Ohio Power Tool

Don’t risk damaging expensive enclosures with improper tools. Ohio Power Tool stocks a full range of knockout punches and dies from industry leaders like Greenlee and Milwaukee. Whether you need a single replacement punch or a comprehensive hydraulic knockout kit, we have the specialized equipment you need to ensure a professional, code-compliant finish.