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Newsgroups: sci.electronics.design,alt.binaries.schematics.electronic,sci.electronics.cad,sci.electronics.basics
Subject: Re: Knuckle Buster Replacement
From: Doug White <gwh...@alum.mit.edu>
References: <t24698le16ia2ccrmqs37o8pdqcdjsjbmg@4ax.com> <n15698peoh3l4kg64sr7p7v9rqt601fo64@4ax.com> <ru7698pkk06eafv13vulgolj6mehrvqj4m@4ax.com>
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Date: Fri, 02 Nov 2012 12:31:30 GMT
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Jim Thompson <To-Email-Use-The-Envelope-I...@On-My-Web-Site.com> wrote in 
news:ru7698pkk06eafv13vulgolj6mehrvqj4m@4ax.com:

> On Thu, 01 Nov 2012 20:41:16 -0400, Spehro Pefhany
> <speffS...@interlogDOTyou.knowwhat> wrote:
> 
>>On Thu, 01 Nov 2012 17:18:23 -0700, the renowned Jim Thompson
>><To-Email-Use-The-Envelope-I...@On-My-Web-Site.com> wrote:
>>
>>>I have a single-action sheet metal punch, punches holes from 3/32" to
>>>9/32".  I think I got it at Harbor Freight.
>>>
>>>Whilst adding some extra holes to the frame of this work-bench I am
>>>building I royally busted up my knuckles.
>>>
>>>Is there a multi-action device out there that has real pressure
>>>multiplication?
>>>          
>>>                                        ...Jim Thompson
>>
>>Dunno about the ones HFright sells, but the genuine USA-made
>>Roper-Whitney punches are pretty decent:-
>>
>>http://roperwhitney.com/punching/2-45.cfm
>>
>>They come in different sizes. 
>>
>>
>>Best regards, 
>>Spehro Pefhany
> 
> That looks like what I have.  I'm squeezing the dickens on the
> handles, finally punches, knuckles bang adjacent sheet metal :-(
>           
>                                         ...Jim Thompson

Roper Whitney's larger one, the XX, has an optional bench mount.  Also, 
the deep thoat means your knuckles are a lot further away from the sheet 
metal.  Warning:  The set of punches it comes with are slightly weird 
sizes, and the extras you will want aren't cheap.  One plus of the bigger 
one is that it can use D-hole punches for BNC connectors.

Doug White