Greenlee 744 is a high - quality knockout punch kit designed for 1/2 - 1-1/4 conduit sizes. It has an impressive capacity, capable of punching through 10 gauge (3.5 mm) stainless steel. The hole size corresponds to the outside diameter of US conduit sizes. For instance, the 1/2' conduit size punch creates a 7/8' hole.
This kit comes well - equipped. It includes punches and dies for 1/2', 3/4', 1', and 1-1/4' conduit sizes, two draw studs (7/16' x 4-1/4' and 3/4' x 5-1/2'), and a metal case for easy storage and transportation.
One of the key features of the Greenlee 744 is its Slug - Splitter SC (self - centering) knockout punches. These punches can handle up to 10 gauge stainless steel. The self - centering design allows the punch to align itself on the pilot hole, eliminating the need to draw crosshairs or line up die alignment marks, saving you time and effort.
Using the Greenlee 744 knockout punch kit is straightforward. First, select the appropriate punch and die for the conduit size you're working with. Place the punch on the pilot hole, and thanks to its self - centering feature, it will align itself automatically. Then, use the draw stud to create the hole in your 10 gauge or thinner stainless steel material.
When using the kit, make sure you're working on a stable surface. Wear appropriate safety gear like safety glasses to protect your eyes from any flying debris. Also, don't exceed the 10 gauge (3.5 mm) stainless steel capacity as it may damage the punches or dies.
For maintenance, after each use, wipe down the punches, dies, and draw studs with a clean, dry cloth to remove any metal shavings or debris. You can also apply a light coat of lubricant to prevent rusting. Store the kit in the provided metal case in a dry place to keep all the parts organized and in good condition.
