767 Greenlee

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daleuger

Senior Member
Location
earth
Love them to death, and they don't leave a whole mess of shavings like a hole saw. Ratchet cutter is just as good for smaller holes depending on what kind of box you're cutting into.
 

physis

Senior Member
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There's a real set.
 

220/221

Senior Member
Location
AZ
I use it for 2" and above. Anything under I holesaw.

Mine is old and leaks oil so it's not exactly a pleasure to use.


Never seen one, how's it work?

It's simply a mechanical hydraulic pump used to pull punches. The hose and KO punches are not pictured.


Well NOW they are.

Mine doesn't look QUITE that clean.
 

480sparky

Senior Member
Location
Iowegia
No - I have not never seen a hydraulic pump. ;)

Think I got it - drill hole, insert shaft through hole, connect cutter, pump to pull cutter through material, making larger hole?

Pretty much it. KO sets come in three parts: a cutter, a die and a draw bolt. The cutter and die work like a pair of scissors on paper, basically shearing the metal. The draw bolt is used to bring the two other parts together.

With a hydro set, the drawbolt is replaced by a piston.

With a C-punch, there's no need to predrill any holes. Real time-saver for punching out panels in commercial apps.


..... I'm curious to see his power tools now.

Put your shades on! :grin:
 

physis

Senior Member
I personally hate this stupid thing. All it does is save me lots of time and make really clean holes, damn it man. :grin::grin:
 

LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
Occupation
Electrical Contractor
Think I got it - drill hole, insert shaft through hole, connect cutter, pump to pull cutter through material, making larger hole?
Let's not leave out the fun step of punching out the 1/2" pilot hole with the thinner drawstud first, and then making the final hole with the main drawstud.

Unless, of course, you use a holesaw to make the larger pilot hole in one feww swoop. But then, that would be gauche, no? :cool:
 
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