How to Build Coils


The world of vaping is more than just inhaling and exhaling vaporized e-juice using a vaporizer MOD. As vapers gain more experiences, they tend to demand better flavors, bigger clouds, or both. Fortunately vaporizer manufacturers understand their consumers’ needs and offer many different types of atomizer; some of which allow for easy coil replacements. Stock coils that come with regular tank atomizers are not necessarily bad, but sometimes the designs, ohm resistance, and size are inadequate to deliver optimum vaping enjoyment, especially for the experienced users. Purchasing many different atomizers just to get different coils makes no financial sense, so long-time vapers typically turn to RDA (Re-buildable Dripping Atomizer) on which they can install custom or aftermarket coils that suit their taste. Ready-made coils are available, but it is actually not that difficult to build one yourself. Here are simple step-by-step instructions on how to build coils for RDA.


Prepare the Tools


A lot of specialty tools for making coils are available; you can purchase them online or from local vaping stores. However, coils are very easy to make that even simple common tools are good enough to do the job. The only tool that’s not likely available in your home is an ohm reader, unless you have an Advanced Personal Vaporizer (APV) or a Regulated MOD which usually has built-in ohm reader and a lot of safety features. Other than an ohm reader, you will need:


  • Wire
  • Wire cutter
  • Screwdriver
  • A pair of tweezers
  • RDA
  • Scissors
  • E-juice


Build a Single 6-Wrap Coil


Before you start making coils, please carefully read the specification of your vaporizers. Each model has limitation in terms of wattage, voltage, and ohm resistance. The good thing is that you can check coils’ resistance directly on the vaporizer or on a stand-alone ohm meter before you actually use it to prevent electricity problems. Even when the resistance turns out to be off the vaporizer’s specification, fixing the coils is usually easy and quick. RDA also has different holes diameter on its positive and negative terminals (posts), so make sure you don’t make a coil that will not fit through them. In this example, you will make a 24-gauge 6-wrap coil.


  1. Cut the Wire


Take a 24-gauge wire and cut it to about 5-inch length. You will not need the entire length just to make a 6-wrap coil, but it is best to have more length than you need. The wire must be as straight as possible; it cannot have kinks because they tend to create problem when the coil is used.


  1. Wrap the Wire


Hold one end of the wire firmly with your thumb against the screwdriver’s shank. Grab the other end and start wrapping the wire around the shank for 6 times. Do as best as you can to keep every wrap close and tight to each other. Make sure there is no overlapping. After the 6th wrap, both ends of the wire should point towards the same directions. You may want to double check to see if you make less or more wrapping than necessary. At this point, your coil is not yet ready. DO NOT remove the coil from the screwdriver.

  1. Coil Refinements


Minor slack is not uncommon, but you can fix this issue by using the tweezers. Hold one end of the coil firmly with your fingers and pull the other end with your tweezers (or pliers). You can only do this properly while the coil is still on the screwdriver.


Note: Screwdriver and tweezers are more than sufficient to wrap coils. If you want to get the best consistent results, you can use a coil-wrapping tool.


  1. Installation


Take your RDA and loosen the post screws most of the way. You can remove the screws completely, but it can be difficult to screw them back on. RDA comes in several different designs; some models have 2 posts, while others are equipped with 3-posts. No matter which model you use, just make sure you unscrew one negative post and one positive post because you are installing a single-coil only. Take your refined coil from the screwdriver and insert both ends through the aforementioned post holes. Try to make the coil as horizontally straight as possible. Tighten the screws, but be careful not to overdo this or the coil will get cut.


Once again, insert the screwdriver through the coil and fix the position. The coil’s ideal position is in perfect alignment with the airflow holes on the top cap of your atomizer. When the top cap is on, you should see the side (not the top) of the coil from the airflow opening. However, you must not allow the coil to make contact with any other piece of metal on the RDA deck.


  1. Check the Ohm Resistance


Insert the RDA to your vaporizer. Turn on to see ohm resistance reading. Advanced vaporizers typically have flexible ohm resistance range. As long as the reading shows that the ohm resistance is within your target (or off by at most 0.2, either lower or higher), everything is good. The next step is to trim the excess of wire as close as you can get to the posts. Try firing up the atomizer. Properly-made coil should heat evenly across the wire. Tighten the coil by squeezing on both ends of the wrapping with your tweezers if necessary.


  1. Wicking


Use only organic cotton as it does very good job at conveying liquid (better absorption). Take enough of the cotton to snugly fit inside the coil. Twist one end of the cotton so it makes a pointy shape. Insert it through the coil and pull it until you get equal length of material on both sides of the coil. Trim the excess cotton on both sides so you can easily tuck it inside the deck. Do not tuck it in a way that it completely blocks airflow from the underside of the coil.


  1. Drip and Enjoy


Wet the cotton with few drops of e-juice, and wait for some seconds to let it soak. Put the top cap on, and vape.