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Need Help with Double D Knock Out Punch #4874931 09/21/18 02:41 PM
Joined: Oct 2011
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user52165 Offline OP
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OK - that got your attention, but it's not that.

Need a Greenlee double "D" knockout punch. Or equivalent.

3/4" x 2/3" - .75 x .67

It used to be a common size for electronics chassis - used to be............... that is 40+ years ago.

Some upward tolerance is OK.

Doesn't seem to be made now.

Ideas? Thanks guys.

Last edited by wwillson; 09/21/18 08:16 PM. Reason: subject clarification
Re: Need Help with Double D Knock Out Punch [Re: user52165] #4874944 09/21/18 02:51 PM
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kschachn Offline
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Aren’t there a bunch of them for sale on eBay?


1994 BMW 530i, 251K
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Re: Need Help with Double D Knock Out Punch [Re: user52165] #4874950 09/21/18 02:53 PM
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gathermewool Offline
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Did you check the etherwebs?


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Re: Need Help with Double D Knock Out Punch [Re: kschachn] #4875080 09/21/18 05:25 PM
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user52165 Offline OP
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Originally Posted by kschachn
Aren’t there a bunch of them for sale on eBay?


Not that size.

Re: Need Help with Double D Knock Out Punch [Re: user52165] #4875440 09/21/18 09:53 PM
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jhellwig Offline
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Unless you can find a Chinese knockoff or a used one on eBay you don’t have much options other than greenlee. There are a few meant for locks out there. Is it a lock application or electrical? If it is electrical you can find a good selection of 22mm or 30mm round devices.

Last edited by jhellwig; 09/21/18 09:53 PM.

Sparks fly from my fingers.

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Re: Need Help with Double D Knock Out Punch [Re: user52165] #4875689 09/22/18 08:05 AM
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NYEngineer Offline
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In the past, I needed to make some D shaped holes for bulkhead connectors and I didn't have a D punch so I used a punch that was close and small and then filed one side flat and went at the rest with a round file to make up the diameter. Worked great but took some time. No where near as fast as a punch.

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