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cab light knock out tool?

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Old Mar 13, 2012 | 08:30 PM
  #1  
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cab light knock out tool?

I want to pick up the knock out tool you all talk about for a cab light install. I have a step drill but if this other tool is better I will pick one up. But I am not sure on the size I have seen 1/2" and I have seen 7/8". Which one is it?
 
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Old Mar 14, 2012 | 04:12 PM
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Just installed my lights last week I just used a 3/4 Drill then used a dremill tool to smooth off the edges worked fine I used a shop vac to catch all the shavings but was much cheaper the buying a Knock out tool
 
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Old Mar 14, 2012 | 05:28 PM
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Great so now I have 1/2" 3/4" and 7/8".. Next person will post up 5/8" haha
 
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Old Mar 14, 2012 | 05:32 PM
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The tool you want is called a Greenlee Knockout Punch. You can rent one at any tool rental yard. The size you want is called 1/2" conduit, or 7/8", which is actual hole diameter. Just get the one that you crank down with a wrench. You don't need the fancy one with a driver.

Using that you will only need to drill a 3/8" hole for the punch bolt. Much less chips than drilling bigger holes.

Looks like this:
 
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Old Mar 14, 2012 | 06:27 PM
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Greenlee tool # 14722, Its called a 1/2 inch but makes a 7/8 hole. This is the one I used when doing mine works great.
 
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