L H Dottie Co HPD78 Knockout Die 1/2 Inch Conduit

Product Description

The L H Dottie Co HPD78 is a 7/8 inch knockout die designed for punching clean, precise holes to accommodate 1/2 inch conduit. Used with a compatible knockout punch driver, this die produces consistent knockout openings in electrical enclosures, junction boxes, panels, and sheet metal. It is a single-piece die sold individually and is a standard tool component for electricians working conduit installations that require field-cut penetrations. The 7/8 inch cutting diameter meets the standard trade dimension required for 1/2 inch electrical conduit entry points.

This die is suited for residential and light commercial electrical work where conduit entry points must be field-fabricated. Common applications include metal enclosures, load centers, pull boxes, and equipment cabinets. It is used by licensed electricians and electrical contractors who need repeatable, clean-edged knockouts without distorting the surrounding panel material. The die is sold as an individual unit, making it a practical replacement or addition to an existing knockout punch set.

Key Features

• 7/8 inch cutting diameter sized for standard 1/2 inch conduit entry
• Designed for use with knockout punch driver systems
• Produces clean, burr-minimized openings in sheet metal enclosures
• Sold individually as a single replacement or supplemental die
• Compact hardware accessory for field conduit work

Compatibility

Designed as an OEM-style replacement die for knockout punch sets that accept a 7/8 inch die for 1/2 inch conduit applications. Verify thread and stud compatibility with your specific punch driver before use.

Installation Notes

Installation of knockout dies is typically performed by licensed electricians in accordance with NEC guidelines. De-energize and lock out any panel or enclosure before punching knockouts. Secure the punch stud through a pilot hole, seat the die, and apply force with the punch driver tool until the slug is fully separated. Inspect the knockout opening edge for sharpness and deburr as needed before pulling conduit.