View Full Version : Joining elastic bungee cord.

13-10-2014, 04:44 PM
I have a plywood product im thinking about producing on my router. It incorperates a bungee cord that acts as a preload spring.

I need to join 3mm elastic shock cord into a loop to make the part. Would rather not simply tie them together as its hard to get the lengths consistant and it looks a little messy.

These crimps look quite good, I contacted the seller in regards to which type of crimping pliers would work for this, but they are taking their time to reply. I can't find anything similer in the UK. What would you guys do to join bungee cord in neat loop?

Here is the link to the crimps



Boyan Silyavski
14-10-2014, 08:42 AM
Best would be if you join then via small hot melt casting. The way a USB or 3mm jack cable ends. You can use good high temp heat glue gun/190-220C/, make small 2 piece aluminum mold and inject the hot melt - Polyamide Sticks - TEC Bond 7718 , thats what i use.

Dont forget to leave small air escape hole/0.5mm or similar/ and use 2 pins to center the mold. Or maybe not, the air will escape through the bungee cord

I have done that and works, i have cast things as big as wheel over 2 skate bearings using 80W gun. You will find a good ~200w gun extremely easy to work with

There are other sizes, you have to calculate if its worth but 12mm works ok for small details. Otherwise i would jump to bulk melt gun

Guns 12mm :

Glue 12mm:

or sth like these:

http://www.ebay.co.uk/itm/Blind-cord-connectors-and-beaded-chain-joiners-Metal/360375046954?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%2 6asc%3D25400%26meid%3D746e8ee800364c3a98437abe8257 42ba%26pid%3D100005%26prg%3D10670%26rk%3D6%26rkt%3 D6%26sd%3D300358665590&rt=nc

14-10-2014, 06:13 PM
Those crimps look like a cheap, neat, way to do it. I'd be surprised if you couldn't do the job with a big pair of pliers, or for a posher job drill a hole in a bit of steel, slit it down the middle, and clamp in vice as an improvised press. Look for a "proper" tool if the prototypes work out well!