Path: csiph.com!eternal-september.org!feeder.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Don Kuenz Newsgroups: sci.electronics.design Subject: Re: Patch-panel fabrication Date: Sat, 6 May 2017 05:33:19 -0000 (UTC) Organization: A noiseless patient Spider Lines: 38 Distribution: world Message-ID: <201700505d@crcomp.net> References: Injection-Date: Sat, 6 May 2017 05:33:19 -0000 (UTC) Injection-Info: mx02.eternal-september.org; posting-host="7b8d7352583f4202cd22c980d1d90c78"; logging-data="25537"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+yL6KdeJV2I4rnUZgdMl7y" Cancel-Lock: sha1:I5FhkR8FEa3L/NZ7ymkIAAXRwmw= Xref: csiph.com sci.electronics.design:459045 Don Y wrote: > On 5/4/2017 8:40 AM, jrwalliker@gmail.com wrote: >> On Wednesday, 3 May 2017 20:54:30 UTC+1, Don Y wrote: >> >>> The "easy" way of making something "cleanly/precisely cut" would >>> be to do so on the laser cutter. But, that limits you to >>> acrylic and thin sheets of hardwood (60W CO2). Neither of which >>> is particularly stiff when those sorts of long slotted openings >>> are introduced. >> >> Not necessarily. I recently had a large plate of 10mm thick steel >> laser cut to modify a chimney for a woodburning stove. > > With a "60W CO2" laser? :> > A Greenlee keystone knockout punch ought to also work. If such a thing actually existed. The ICC IC107PP024 24-port 2 RMS patch panel blank is only 1.5mm thick ?steel? The smallest Greenlee rectangular knockout punch measures 11.1mm x 22.2mm and is rated for a maximum thickness of 1.5mm. The thickness rating goes up from that size. A keystone knockout measures 15mm x 19mm. The top half of page 95 of the Greenlee knockout catalog https://greenlee-cdn.ebizcdn.com/media/2015%20Knockouts.pdf shows rectangular knockouts while the bottom half shows D-Sub knockouts. We live in a keystone world. It's hard to believe that Greenlee doesn't offer a keystone knockout. Thank you, -- Don Kuenz KB7RPU