Carto punch - will this work?

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Mapultz

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Dec 6, 2013
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I accidentally bought un-punched cartos online. Instead of returning them, I decided to grab a carto punch tool from my local B&M. I got a hole punched without any trouble...but now there's a dent around the hole. Will that affect the way the carto performs?

Also, is there any way to punch a carto yourself without denting it?

 

mobocracy

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Oct 21, 2013
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I used a cheap punch for a while and what I found was that as the punch tip dulled, the dents got bigger.

Eventually they were deformed enough that I had a really hard time getting them into a tank. I even managed to cut a finger trying once.

I bought a better punch which supports the carto better and appears to have a better punch tip, too, and the deformation doesn't really affect getting into the tank anymore.
 

mostlyclassics

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I used carto tanks for quite a while until devices like Vivi Novas were available. And I used a simple punch I picked up at a Big Box store. I think it was four bucks.

It worked fine at punching holes, but always put quite a dent in my cartos. Never had a problem with the dented cartos.

If the dent was so large that it impeded insertion into the tank's end-grommet, I just changed out the pointed bolt in the punch for a new, sharp one. A bolt would last for about 5-8 cartos before needing replacement.
 

r77r7r

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  • Feb 15, 2011
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    For those that want a good punch with replaceable screws, this was one of the first good ones ( by a fellow ECF'r). The coupler was shipping for free. The screws are available also at auto stores.

    http://www.drillspot.com/products/157425/Lovejoy_AL050_Aluminum_Shaft_Coupler_Body

    Amazon.com: 25 1/4-20x7/8 Mirror Mounting Screw Phos W/Nylon Washer: Automotive

    SUPCO bullet piercing valves are also a fav. Remember- with all punches it only takes about 1 full turn past puncture to give a good hole. Anymore just increases the Dent. Better to make a few small holes than a couple big dented ones.
     
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    oplholik

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    Before I punch, I take a dremel and a thin(approx. .023" thick) cut off wheel in the area it's to be punched and grind away some metal. Makes punching a lot easier, and no deformation.. Just do it slowly and gently so as not to break the wheel. A thicker one would work also.
    Doing this does not take long. If you don't already own a Dremel, obviously it wouldn't be worth the investment just for this.
     

    r77r7r

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  • Feb 15, 2011
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    Before I punch, I take a dremel and a thin(approx. .023" thick) cut off wheel in the area it's to be punched and grind away some metal. Makes punching a lot easier, and no deformation.. Just do it slowly and gently so as not to break the wheel. A thicker one would work also.
    Doing this does not take long. If you don't already own a Dremel, obviously it wouldn't be worth the investment just for this.

    Why not put a drill bit in it and drill the hole??
     
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