Coil generally refers to a type of looped metal, and coil winding involves rolling up this coil into a tightly packed circle. You have different ways to wind coil, including by hand, drill and jig winding. But for all these methods you need certain types of coil winding tools to help you with the process. You can purchase these tools either from hardware stores or online.
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Drills are used with the drill winding method, and the drill bit (or mandrel) is a long, solid piece of metal. This drill bit varies in thickness, depending on how tightly you want to coil your wire. For example, if you are coiling a piece of copper wire, you should use a bit with a smaller diameter to get the wire really tight. While you can use a portable drill, you should use a drill that you can set up on a stand and that has a button that keeps the drill in the "On" position, which allows you to use both hands to control the wire.
You need gloves to protect your hands from the wire, which can cut your hands. Purchase thick gloves, preferably of a durable leather that the wire won't pierce. Look for ones with thicker material near the fingertips.
A mandrel is any type of long circular tube over which you can wind the coil, and you can purchase metal rods or wooden dowels for this purpose. If you purchase a standard dowel or rod, you do need to drill a hole through one end of it as this is where you run the wire through to hold the wire in place while you coil it. Purchase mandrels the same diameter size as you need the centre of the coil to be. You can use mandrels for both hand and drill winding. In the case of the drill, you just need to insert the end with the hole in the drill bit opening and lock it in place.
A jig is a set-up that allows you to control the motion of another instrument, and, in this case, it controls your winding drill, which helps you ensure that you accurately wind the coil and that you can repeat the process over and over again without mistakes. Generally, jigs are made of either metal or wood. You can make your own jig, or you can purchase one from a hardware store.
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