Jump Ring Mandrel For Drill

Stretch the mandrel either by clamping one end in a vise and hold the other end in a pair of draw tongs and give a quick and firm jerk or stretch it in the draw bench and voila the coil of oval jump rings comes off like butter.

Jump ring mandrel for drill.

To get the rings off the mandrel anneal the rings on the mandrel and here comes the real trick. This set consist of 20 plated steel mandrels sizes range from 2 5mm to 12mm. You can make a jump ring coil by using an old fashioned hand drill to hold the mandrel. Pound your little nail into the wood just to one side of the hole.

We used copper and brass mandrels in the cross section of the required jump ring ovals rounds and so on. These can be used to attach charms to bracelets build chains for jewelry or simply to attach clasps. These mandrels are zinc plated to prevent corrosion and last for years. The wire is wrapped around a mandrel to make spring like coils.

When i worked in a factory in pforzheim we would use a specialized jump ring winding tool which was essentially a kind of fancy hand drill with gearing and a jacobs chuck. Each full loop will create one jump ring so continue until you ve created enough loops for the number of jump rings you need. When i worked in a factory in pforzheim we would use a specialized jump ring winding tool which was essentially a kind of fancy hand drill with gearing and a jacobs chuck. Cut the rod if using 1 4 inch round rod your end jump rings will be equivalent in size to the 6mm jump rings found in craft stores.

Your only real material needed is your round rod to serve as your mandrel. If using a 3 8 inch round rod your jump rings will be close to 9mm jump rings. The resulting coils are then cut using a jeweler s saw. Carefully feed the wire onto the mandrel while slowly and steadily cranking the drill.

Pepetools jump ring maker mandrels that are included with the jrm2 jump ring making kit now sold separately. If you don t have a drill bit that is exactly the size of your mandrel drill a slightly smaller hole and enlarge it to the right size with a file. Drill a hole in your piece of wood that is exactly the size of your mandrel 1 4 in the picture. This creates a superior jump ring that closes smoothly and neatly.

Then secure your new jump ring mandrel to your work table or wherever else you plan for it to live. We used copper and brass mandrels in the cross section of the required jump ring ovals rounds and so on. Kink the end of the wire to a right angle and slip it into the jaws of the chuck. Clamp the drill handle into a vice and chuck the mandrel into its jaws.

Wrap your wire around the mandrel keeping each loop close to the previous one.