Making A Large Hole The Easy Way

I wanted to remove the perforated fan grill on an old ATX case I’m rehabilitating.

First I drilled a 3/4” hole with a step bit.

Then I got out the largest Greenlee punch I have.

And my hydraulic driver. One of the best tool scores of my life, I paid $7.00 at a yard sale. Look at the price of a kit on Amazon.

Assembled through the 3/4” hole. A little easy pumping…and the punch makes the hole.

Releasing the hydraulic pump.

The hole and slug. This is a lot easier than using a hole saw.