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High-speed steel: made from carbon steel with chromium and vanadium additives. It’s suitable for drilling wood, plastic and soft metals. For a start, drill bits are made from a number of different materials. And then the shape of the cutting face can be radically different depending on the material it’s designed to drill through. When you factor in price, the range of sizes available within a set, and the brand, the choice can be bewildering.
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. Spur-point drill bits are the best for drilling holes in plastic. The direction and angle in front of the drill help you ensure that stress is lowered and that the gap is smooth. I suggest you slow down as you cut to get a neat and clean hole. How Do You Drill A Hole In A Plastic? Cobalt: an incredibly strong alloy metal used to drill through tough materials. It can withstand heat and resistance and is the best drill bit for stainless steel.In this section, we’ve reviewed the 6 best drill bits for plastic for sale right now, including drill bit sets. Tungsten carbide: made from a mix of tungsten metal and carbon. It's even more hard-wearing than the standard carbide above. It is suitable for drilling into extremely tough materials such as masonry.
More gentle bits designed for use with wood will perform a little better, but may not have the right style of tip to make a clean entry into the plastic you’re drilling. Is it worth buying a drill bit set? 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. Prior to drilling a hole in the plastic, it’s recommended to clamp down the plastic material securely to a bench or solid surface. This helps make sure that the plastic object stays stationary throughout the drilling process. So, your chances of ruining the material by drilling are minimized. In addition, it is recommended that you place a spare piece of plywood underneath the plastic object. The plywood acts as a barrier and helps minimize your chances of chipping the surface on the bottom.
This might come as a surprise to you, but plastics are, in fact, drillable. However, one needs to adhere to a strict set of protocols when attempting to drill a hole through plastic materials. It’s easy to spend plenty of time researching for your next drill, but it’s just as important to find the very best drill bits for your project. That’s because when it comes to drill bits, all things are most certainly not equal. Cobalt drill bits are much harder at higher temperatures making them good for drilling through stainless steel and other hard materials, though they are usually way in excess of what most DIYers need. Most red wall plugs are 6mm in diameter, so to drill a hole for a red plug, you will need a 6mm drill bit. We wouldn’t recommend drill bits you’ve bought for plastic be used on wood or masonry, or vice versa.
A drill bit's suitability for drilling into certain materials usually depends on what the drill bit is made from and coated with. The drill bit guide below describes the main options: Toughness is paramount when drilling into metal because the heat generated can easily spell the end for cheap drill bits. Not so here, as this set from Draper sees the HSS straight shank bits coated with long-testing and tough titanium nitride. They’re likely to last longer, and they will not get lost as they come in a soft-grip plastic case which is clearly labelled, making finding bits and returning them to their correct slot a simple task. It’s also finished in Draper’s trademark blue, making it easier to spot at the bottom of a tool bag. You can technically use traditional masonry bits or wood bits for drilling through plastic, with the right technique. However, these types of bits often leave a sharp edge and a poor-quality finish when drilling through plastic, because they’re designed to bite into the material. The drill bits are not durable because they break very easily. Sometimes the drill bits’ sizes do not fit your drill, so you have to find other ways to use them. It’s also considered best practice to use a lubricant when drilling for deeper holes. The lubricant aids in the removal of debris and dissipation of heat. Throughout the drilling process, you should keep a watchful eye on the area around the hole you’re making. In the event that you observe plastic shavings gumming up, you should immediately stop drilling, let plastic cool, clear out the hole, and then resume drilling.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. Finally, you also need to bear in mind that plastic materials undergo expansions and contractions with fluctuations in temperature. So, you want to make sure that your drilled hole is slightly larger than required. Doing so will allow screws placed in those holes to move freely without exerting unnecessary stress on the plastic material. How Do You Drill a Hole in Plastic Without a Drill? When drilling plastic, it is critical to use a slower drill speed. This will keep the high speeds from causing tremendous friction, and therefore melting through the plastic. A slower pace will also enable the chips to exit the hole immediately—the greater the size of the hole, the slower the speed of the drill.
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