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SMA Bulkhead Feedthrough Punch - RF Cafe Forums
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| jeffdarrow
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Post subject: SMA Bulkhead Feedthrough Punch
Posted: Wed Dec 29, 2010 3:45 pm
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Joined: Wed Dec 29, 2010
3:36 pm
Posts: 2 |
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biff44 |
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Post subject: Re: SMA Bulkhead Feedthrough Punch
Posted: Mon Jan 03, 2011 9:14 am
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Joined: Wed Apr 08, 2009
11:07 am
Posts: 33 |
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I needed one for a job a few months back, and looked
all over but came up empty handed. I was looking
for a "greeley punch" type device.
To get
by, I took a round file of the appropriate diameter,
and belt-sanded a flat spot on one side. It did
not work all that well...some of the connectors
still rotated. But that was in sheet metal, maybe
if it was thicker metal I could have done a more
precise filing job.
If you find one, let
us know!
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Kirt Blattenberger
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Post subject: Re: SMA Bulkhead Feedthrough Punch
Posted: Tue Jan 04, 2011 9:56 am
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Joined: Sun Aug 03, 2003
2:02 pm
Posts: 308
Location: Erie, PA
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Greetings jeffdarrow:
I have searched high
and low in the past, and again just now, looking
for an SMA panel punch, all in vain. I'm guessing
that panel manufacturers have a die maker fabricate
custom punches. Evidently the market isn't big enough
to support a commercial product.
Greenlee
makes a large set that starts at about 1/2" (which
should work for a BNC type), but nothing smaller.
It's hard to believe that some Chinese company doesn't
offer the SMA and other sizes.
I suppose
what the Tyco rep said is probably ture in some
instances where a CNC machine is cutting an entire
panel, but I remember days way back in the 1980
- back when companies like GE and Westinghouse had
their own in-house machine shops, where the sheet
metal guys punched D holes and the holes for D-Sub
multipin connectors.
If you do manage to
locate the punch you're seeking, please let me (us)
know.
_________________
- Kirt Blattenberger
RF Cafe Progenitor & Webmaster
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jeffdarrow |
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Post subject: Re: SMA Bulkhead Feedthrough Punch
Posted: Tue Jan 04, 2011 1:50 pm
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Joined: Wed Dec 29, 2010
3:36 pm
Posts: 2 |
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Thank you both for your replies. I have given up
my search with the same conclusions you have both
come up with. I suppose for now we will have to
use the drill bit/metal file solution. It is unfortunate
that a company like Greenlee hasn't made such a
product yet. Perhaps one day they will see a big
enough market.
Thanks again for your input.
Jeff
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kmorgan |
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Post subject: Re: SMA Bulkhead Feedthrough Punch
Posted: Wed Jan 05, 2011 4:13 pm
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Joined: Sat Dec 18, 2010
8:56 am
Posts: 5
Location: Long Island,
NY |
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Just my 2 cents... You could try a homemade punch.
Get an inexpensive circular punch with the right
diameter for the round part of the hole and file
or grind one side so you just have the "C". Punch
that and finish up with an sharp, inexpensive chisel
(woodworking type) to get the flat.
Good
luck.
Kevin
_________________
Kevin AB2ZI
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biff44 |
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Post subject: Re: SMA Bulkhead Feedthrough Punch
Posted: Mon Jan 10, 2011 11:36 am
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Joined: Wed Apr 08, 2009
11:07 am
Posts: 33 |
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I also suspect that an actual machine shop would
use a broach instead of a punch to machine the D
shaped slot. That way, they can get thru thicker
material too.
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bhawkins |
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Post subject: Re: SMA Bulkhead Feedthrough Punch
Posted: Wed Feb 16, 2011 3:59 pm
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Joined: Sun Feb 15, 2009
9:54 pm
Posts: 7 |
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Posted 11/12/2012
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