Mounting panel BNC's without Amphenole knock-out punch thingy - Page 1
Forum section: electronics / projects

author: Cliff Matthews
author_rank: Unknown
timestamp: January 25, 2017, 04:25:04 pm
content: Not so good here at machine stuff..I'm trying mount some BNC jack's, but also not to make a mess helping along with my son's school project.Am I on the right track here, if I have little time? (or no great need to order the correct hole punch?)

author: ajb
author_rank: Super Contributor
timestamp: January 25, 2017, 04:42:01 pm
content: Yeah, that's a good way to go. To be honest, if it were me and it wasn't something that was going to see a lot of use I might just drill a hole to the outside diameter and use a bit of glue to keep it from spinning.

author: Cliff Matthews
author_rank: Unknown
timestamp: January 25, 2017, 04:51:39 pm
content: If I make a mess of it, what Home-Depot glue would bond nylon to aluminum? (needing options here..)

author: Benta
author_rank: Super Contributor
timestamp: January 25, 2017, 05:12:08 pm
content: I remember from from many years back, that a special washer was available for BNC.The washer had the correct hole with the flat (preventing the BNC from turning), and two opposed tabs. The tabs had a right-angle bend at the ends.The idea was, to drill the panel hole to full size for the BNC, ignoring the flat.From the rear side of the front panel, you'd drill two 3 mm blind holes where the tab ends would fit. This prevented the washer from turning.Don't know if they are still available, but a search at the connector suppliers might help.EDIT: Found these, could be an option:http://www.canford.co.uk/BNC-CONNECTOR-INSULATING-WASHERS-Panel

author: Ian.M
author_rank: Super Contributor
timestamp: January 25, 2017, 05:37:24 pm
content: You can still get insulating mounting washers for BNC connectors.e.g.http://www.canford.co.uk/BNC-CONNECTOR-INSULATING-WASHERS-PanelEdit: Benta just found the same one while I was typing thisIt has the anti-rotation flat on the inside and a protruding pip on the outside, so all you need to do is drill the correct oversize hole and file a notch for the pip.

author: Cliff Matthews
author_rank: Unknown
timestamp: January 25, 2017, 06:10:27 pm
content: Washer set insulates and sure would work. However, my young lad stretched his project out past the 11th-hour (but good to know).

author: TimFox
author_rank: Super Contributor
timestamp: January 25, 2017, 08:04:56 pm
content: So long as you don't intend to apply huge torques to the mating connector, I recommend drilling the appropriate round hole (usually 3/8" = 0.375" = 9.525 mm) and then carefully strike the panel just outside the circle with a center punch to indent the aluminum inward radially.

author: georges80
author_rank: Frequent Contributor
timestamp: January 25, 2017, 08:28:38 pm
content: Step drills are great from drill through thin gauge materials.cheers,george.

author: grifftech
author_rank: Frequent Contributor
timestamp: January 25, 2017, 09:44:53 pm
content: Quote from: Cliff Matthews on January 25, 2017, 04:51:39 pmsuperglue

author: Benta
author_rank: Super Contributor
timestamp: January 25, 2017, 10:08:21 pm
content: QuoteIn some of the projects I've worked on, we call it "Sirtaki Development". You know, the Greek dance that starts very slowly and gets faster and faster until it's a frenzy at the end

author: Cliff Matthews
author_rank: Unknown
timestamp: January 25, 2017, 10:19:59 pm
content: Quote from: TimFox on January 25, 2017, 08:04:56 pmAn interesting take, thanks! These seem slightly smaller at 0.315" (blue diameter) with a thread depth of 0.025" (so red diameter is 0.365").