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Clamp the plastic tightly to a stable surface and use a spare piece of plywood underneath to support the portion of the plastic you are drilling. Drainage holes allow excess water to drain on out and will keep your plant and soil from getting soggy. If you plan to keep your pot indoors, add a drop tray underneath to avoid extra water dripping out onto your tabletop. Types of drill bits for each type of pot: Drilling holes in the bottom of a pot is an easy way to add drainage. If there are holes – assuming they aren’t clogged by anything – there’s no way that your plant will get water logged.
Alternatively, you can use a countersink bit to create an initial depression in the plastic. This serves the same purpose as a dowel bit – ensuring that the bit is lined up and does not move as you begin to drill the hole.Choosing the correct type of drill for plastic is essential to ensure that your holes are uniformly shaped, clean, and undamaged. Knowing the right way to drill holes in plastic will save you a lot of time and resources. Once you’ve chosen your drill bits, it’s time to get to work. Generally speaking, plastic is not very hard to drill. There are a few things to note if you want to get smooth, clean holes.
Of course! The material of the bit itself. Most can be made from high-speed steel (HSS), tungsten carbide, or cobalt. You’ll want to make sure you choose a metal that will last long enough to do the job. Does Size Matter? In this guide, we take a look at the best drill bits for plastic and share some tips on how to get the cleanest, smoothest holes when drilling this material. Which Drill Bits to Use on Plastic But be careful to look closely at the bits included in a given set. There’s not much point buying drill bits you’re never going to use. However, it can be nice to have easy access to that drill bit you’ll use every few months or so. Place a pot with drain holes (like the plastic nursery pot a plant comes in) inside a larger pot. Water can dribble out the inner pot and it won’t get soggy.You don’t want 2 holes too close together or it could compromise the strength of the plastic in between them. Video demonstration It’s also important to keep the bit lubricated as you work - especially when drilling deeper holes. This will remove any debris and prevent overheating. As plastic expands and contracts when temperatures change, make sure to drill a slightly bigger hole to make room for any screw movement without the risk of putting stress on the plastic. The best solution is to add drainage holes to the bottom of your plant. Many pots come with drainage holes in them, but some do not! Why are drainage holes so important? Some people also like to use step drill bits for drilling plastic, to avoid having to change bits around to drill lots of different-size holes. The added benefit of these bits is they can make it easier to start your hole without the need for a countersink bit. What about the different types of plastic?
Metal and masonry drill bits are designed to bite into the material, meaning they can be quite rough on plastics. If you’re just looking to punch some holes in a plastic lid, then going for a single 3/16″ drill bit will do you fine. Smaller diameter drill bits tend to be easy to break, so it’s a helpful touch that Draper has doubled up on the 1.5, 2.0, and 2.5mm bits. And the inclusion of a 3.2mm bit, in addition to the 3.0 and 3.5mm bits, is helpful too.
They come with a 60-degree tip angle, which makes for a clean entry into both hard and soft plastic. Norseman’s bits are also designed to prevent grabbing or tear-outs, making them especially easy to use for beginners. These are some of the only drill bits you can buy right now that are designed specifically for use on plastics, including hard plastics such as acrylic. The best drill bits for plastic are spur (also known as dowel or Brad point) bits. These bits essentially have a four-point tip, which results in a much neater entry point and a cleaner hole. For one hole, drill it in the center, for two or more holes, instead drill them halfway between the center of the pot and the edge, for increased stability. Don’t worry about breaking it – once you remove it, you won’t need it any more. STEP 3: Flip the pot upside down
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