Temco Hydraulic Knockout Punch Th0004 - Electrical Conduit Hole Cutter Set Ko Tool Kit 5 Year Warranty

This is actually my 3rd tool from TEMCo. I’m consistently impressed how they get this quality at the price point. Works just as well as the Greenlee it’s replacing. It’s smooth, cuts clean, and it’s easy to remove the punched out piece the way it bends it. If you need a punch kit, and this one has the sizes you need, you won’t be disappointed.

i bought one for myself as electrician, after couple months i got another one for my brother. because of good customer service and fast reply to my request. the kit is easy to work with. so far so good.

This product is great and compared to other manufacturers you cant beat the price. This is an electrician tool so the sizes are for conduit so they aren't true measurements. So the 1/2 inch knock out is 7/8 if you want to know the rest look them up its a standard. If you don't understand this, this isn't the product for you. Stop complaining the sizes are wrong they aren't you just don't understand the product. The bit does pull much faster then others I've used so I do expect it to fail eventually but who knows.

This is the 3rd kit of knock outs and they work great! The price is much lower than the leading competitors but the quality is comparable to the top brands in the industry

I actually would give this unit 4.75 stars, but I didn't want Amazon to show 5 stars, because it's not quite perfect. But with just a little bit more effort by TEMCo, it could be truly excellent. I bought this unit to punch various holes in project boxes for my electronics projects. The boxes are made of about 1mm thick (20 gauge) aluminum. I have not previously used a hydraulic punch, just manual ones, so this review is written from the perspective of somewhat of a beginner. On the positive side, the various pieces are well packaged and seem very sturdy. As others have remarked, this unit is a great bargain for the price. TEMCo has obviously put some care into the presentation. And I like the warranty. I tried out all of the punches and they work beautifully. The four largest punchout die (1" -> 2") thread on to a main stud, which in turn threads into the hydraulic ram. The other two (1/2" and 3/4") punchout die thread on to a smaller adapter stud, which in turn threads into the main stud. Two thick spacers (provided) fit over the main stud and are used to accommodate the thicknesses of the various punchout die. You will need to play with the spacers a bit to maximize the throw of the hydraulic ram to get the best punch, depending on which punch die you use. Here's where a problem appeared. I could ... not... get (frustration!) the right spacer combination for any of the four largest die. The two spacers provided were too thick. I needed something smaller. I suppose that I could have adjusted how deep the main stud threaded into the hydraulic ram to change the throw distance of the punch. But that seems risky since a lot of force is applied to the main stud and I wanted it fully threaded into the ram. So I went to my local hardware store and purchased some hardened washers that were large enough to fit over the main stud. Each washer was about 9/64" thick. I found that three of these washers worked perfectly to give optimum throw for the 1-1/4", 1-1/2" and 2" die. And I added a fourth washer to optimize the throw for the 1" punch out die. For the small 1/2" and 3/4" die, two of these washers in addition to the thick spacers provided in the kit gave the best throw. I think these should have been provided in the kit, or if they really aren't needed, then a better description of how to use the spacers provided would have been nice. A couple of other useful tips. Put a little oil on the threads of the studs and the punchout die. It makes it easier to assemble and disassemble the die, especially as they tend to jam if the cut is not complete. Also, the pilot hole that you must drill in the panel is very large if you are using any of the larger (1", 1-1/4", 1-1/2", 2") punchout die. I found that the 1/2" punchout die gives a hole exactly the right size for the pilot hole of the larger punchout die. This saves having to muck around with a very large drill bit. So, all in all, a beautiful unit. Just needs a few smaller spacer/washers and a bit better written description to be perfect.