Greenlee 744 Hydraulic Knockout Set 7 Piece

Product Description

The GREENLEE 744 is a 7-piece hydraulic knockout set designed for punching clean, round holes in electrical enclosures, panels, and conduit entry points. It uses hydraulic force to drive a round punch through mild steel up to 10 gauge, producing accurate holes for conduit fittings without distorting the surrounding material. The set covers 1/2 inch through 1-1/4 inch conduit sizes, making it a practical single-kit solution for the most common conduit entry sizes encountered on commercial and industrial electrical work. Licensed electricians and panel installers are the primary users of this tool.

The GREENLEE 744 is suited for residential service panel work, commercial electrical rough-in, and industrial enclosure fabrication wherever conduit entries must be added to sheet metal boxes, panels, or enclosures. The hydraulic operating method reduces the physical effort required compared to manual punch sets, making it well-suited for repetitive knockout work on multiple enclosures in a single job. The included punch and die range covers the conduit sizes most frequently specified in low-voltage and power distribution installations.

Key Features

• Hydraulic operation reduces effort on 10-gauge mild steel knockout work
• Round punch profile produces clean, burr-minimized holes sized for conduit fittings
• Covers 1/2 inch to 1-1/4 inch conduit sizes in a single set
• 7-piece set includes matched punches, dies, and draw studs for each size
• Punch hole diameter range: 22.5 mm to 43.2 mm
• Maximum material capacity: 10-gauge mild steel

Compatibility

Designed for use with standard 1/2 inch to 1-1/4 inch conduit fittings. The included draw studs, punches, and dies are sized for those conduit ranges. Verify hydraulic driver compatibility before use if pairing with a separate hydraulic unit not included in this set.

Installation Notes

This tool is installed and operated by licensed electricians working under NEC guidelines. De-energize and lock out any panel or enclosure before performing knockout work. Use a center punch to mark and pilot-drill the draw stud hole before threading in the stud and assembling the punch and die. Do not exceed the rated material gauge capacity, as overloading can damage the punch or die.