Blaize110 Posted November 23, 2009 Share Posted November 23, 2009 Not 100% theatre related but perhaps you can help me. My cadet contingent signals section uses copper sleeves to join together wires when they break. These are about 1" long, are a copper colour and have a plastic sleeve in the middle (not sure if it goes all the way thorugh or just at the ends.) And possibly another thinner copper tube in the middle although I cant remember off hand. You feed the wires in either end and use a compression tool to crimp the sleeve and trap the wires in the sleeve. However we are running low and need some this weekend. I was wondering if such things were used for non-military purposes and therefore if anyone knew where I might be able to aquire some. Thanks in advanceRory Link to comment Share on other sites More sharing options...
Ben Posted November 23, 2009 Share Posted November 23, 2009 Any chance of a picture? Link to comment Share on other sites More sharing options...
Jivemaster Posted November 23, 2009 Share Posted November 23, 2009 http://www.maplin.co.uk/Module.aspx?ModuleNo=42718 Search Butt Splice or Butt crimp in all the usual online suppliers RS CPC Rapid etc and in your local auto electrical shop. Now there USED TO BE some nice pyro joiners! Copper sleeve with flux and solder and a couple of bengal matches. All supplied in a polythene bag Link to comment Share on other sites More sharing options...
TomHoward Posted November 23, 2009 Share Posted November 23, 2009 If it is the crimps above I get them from Screwfix, approx £7 for 100. They have a load of insulated an uninsulated, with terminals etc. http://www.screwfix.com/cats/A331814/Elect...rimps-Terminals Link to comment Share on other sites More sharing options...
Blaize110 Posted November 23, 2009 Author Share Posted November 23, 2009 Thanks to all. I suspected they were out there somewhere, I just needed to know what I was searching for was called. THESE look similar to the ones we use. Would the 25mm be the lenth of them? Link to comment Share on other sites More sharing options...
Simon Lyall Posted November 23, 2009 Share Posted November 23, 2009 Searching my dusty signals notes, the reference only to their name I have is 'Hellerman crimps' (though... that's about as specific as calling a cod... a fish.) Don't forget about the middle plastic layer, apparently making it 'waterproof' At such short notice you're probably going to have to get something similar and make do (and then sack your QM for not keeping his stores stocked!) ;) Simon Link to comment Share on other sites More sharing options...
Blaize110 Posted November 23, 2009 Author Share Posted November 23, 2009 The middle layer isnt too much of an issue as it is an instructional weekend and it is mainly for the cadets to practice with. Any real repairs can be done with the ones we still have left. Will get some from Screwfix tomorrow and give them a go. Link to comment Share on other sites More sharing options...
tony g Posted November 23, 2009 Share Posted November 23, 2009 Searching my dusty signals notes, the reference only to their name I have is 'Hellerman crimps' (though... that's about as specific as calling a cod... a fish.) Don't forget about the middle plastic layer, apparently making it 'waterproof' At such short notice you're probably going to have to get something similar and make do (and then sack your QM for not keeping his stores stocked!) ;) Simon Hellerman have dropped a lot of the crimp range in favor of new push on connectors, you can get conventional red, blue and yellow butt splices for 1.5mm2, 2.5mm2 & 4mm2 wire size respectively from any electrical wholesaler for about £3 + VAT for 100, the red ones work perfectly in the old Hellerman one size crimpers that form a hexagonal crimp Link to comment Share on other sites More sharing options...
Andrew C Posted November 23, 2009 Share Posted November 23, 2009 Guy that I used to work with was O/C Sigs for our cadets. They used standard red insulated crimps for training. Much easier than getting the real things out of some QM with ideas above his station! Link to comment Share on other sites More sharing options...
kerry davies Posted November 23, 2009 Share Posted November 23, 2009 Locate your friendly local BT engineer and steal some from him. The crimps you describe are similar to ones used to join "Open Copper" overhead wires many years ago. There are now a whole range of gel-filled crimps that are in use. When I first joined PO Telephones ALL the kit was the same as the military and even the nomenclature was still military Victorian; "Screwdriver No 3A, insulated, termination for the use of". Drove me crazy. Link to comment Share on other sites More sharing options...
Blaize110 Posted November 23, 2009 Author Share Posted November 23, 2009 "Screwdriver No 3A, insulated, termination for the use of". Drove me crazy. Oh so true! I should really have said that the crimps were used with "Tools Compression". Really doesnt help teaching new material if you have to decipher it first :P Link to comment Share on other sites More sharing options...
Jivemaster Posted November 23, 2009 Share Posted November 23, 2009 The ones linked in post 5 would NOT likely be the right ones! They would be for 25MM^2 cable and need a very big crimper. The red auto crimps as found in car spares shops etc are most likely the right size, but CHECK FIRST. Link to comment Share on other sites More sharing options...
Blaize110 Posted November 23, 2009 Author Share Posted November 23, 2009 I suspected as much about those 25mm ones. Link to comment Share on other sites More sharing options...
TomHoward Posted November 24, 2009 Share Posted November 24, 2009 You may already be aware of this but the others are colour coded according to cable size - all the info is in the Screwfix catalogue even if it isn't on the website. Link to comment Share on other sites More sharing options...
daifuse Posted November 24, 2009 Share Posted November 24, 2009 Locate your friendly local BT engineer and steal some from him. The crimps you describe are similar to ones used to join "Open Copper" overhead wires many years ago. There are now a whole range of gel-filled crimps that are in use. When I first joined PO Telephones ALL the kit was the same as the military and even the nomenclature was still military Victorian; "Screwdriver No 3A, insulated, termination for the use of". Drove me crazy. I still have a pair of '81's!, 1954 vintage .......... Link to comment Share on other sites More sharing options...
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