What type of drill bits do you need for plastic? (2024)

What type of drill bits do you need for plastic? (1)

While drilling through plastic can be done using any power drill, it’s important to have the correct drill bits so you don’t chip or crack the material. Irregular holes and rough edges could lead to cracking, even months after the drilling occurs. Drill bits for plastic are available in a variety of sizes; however, it’s best to consult with a professional before undertaking a project on your own.

When drilling plastic, the larger the hole, the slower drill speed you should use since high speeds can melt the plastic. Also, always reduce the drill speed as the drill bit exits the material. Before drilling, it’s best to clamp down the plastic securely to a solid surface and back up the piece you are drilling with a spare piece of plywood underneath. This way the drill bit enters the plywood when it exits the plastic and avoids chipping the surface on the bottom.

In addition, it’s recommended to use a lubricant while drilling deeper holes to help remove debris and dissipate the heat. Furthermore, since plastics expand and contract with temperature changes, make sure you drill a slightly larger hole than necessary to allow room for screw movement without placing stress on the material.

The most effective drill bits for plastics are spur-point bits, also known as dowel bits. They are specifically angled to make smooth cuts in the material. A spur-point bit has a central point and spurs that keep the bit aligned, maintaining a clean, neat hole. Some soft materials, including plastics, benefit from countersinking before actually drilling. A power drill is used to countersink or create a depression in the material first. Using a countersink bit along with a plastic drill bit ensures that the drill bit remains in the center of the depression. Never use twist bits when drilling plastics; they can splinter and ruin the material.

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Best Drill Bit for Plastic FAQ

What drill bit is best for plastic?

Spur-point drill bits (dowel bits) are best suited for drilling holes in plastic. The point and angle in front of these bits ensure that the stress in front is minimized and that the cut is smooth. We recommend slowing down as you are exiting to get a clean and neat hole.

Can you drill through acrylic?

You can drill through acrylic. Just drill slowly, make sure that whatever you're drilling into is supported and consider using a lubricant.

What material are drill bits made of?

Drill bit material differs based on their intended use. For example, some bits are made of high-speed steel (HSS). These bits are useful for softer steels, plastic and wood. There also are wood, plastic and even cobalt bits.

Will a spade bit drill through plastic?

If you have to use a spade bit to drill a hole through plastic, we recommend you go slow and be very careful. You might have to sand the edges once you are done.

How do you drill holes in plastic?

When drilling plastic, the larger the hole, the slower drill speed you should use since high speeds can melt the plastic. Also, take care to reduce the drill speed as the drill bit exits the material. Before drilling, it’s best to clamp down the plastic securely to a solid surface and back up the piece you are drilling with a spare piece of plywood underneath.

What type of drill bits do you need for plastic? (2024)

FAQs

What type of drill bits do you need for plastic? ›

Dowel bits or Spur-point Drill bits

What drill bit to use on plastic? ›

What drill bit is best for plastic? Spur-point drill bits (dowel bits) are best suited for drilling holes in plastic. The point and angle in front of these bits ensure that the stress in front is minimized and that the cut is smooth.

What is the best drill bit for hard plastic? ›

HSS Drill Bits

High-speed steel (HSS) drill bits are a popular type to use on plastics. They're tough and sharp and can withstand high temperatures, making them a great fit for harder plastics.

Can I use a wood drill bit on plastic? ›

Multi-purpose bits work on most plastics, however, harder plastics may need a tougher bit such as a Standard HSS bit. Using a wood bit on plastic is a very quick way to splinter the material. Likewise, a heavy-duty masonry bit will also cause cracks and damage.

Can you gun drill plastic? ›

Almost any materials can be gun drilled from ferrous and non-ferrous metals, powder metals, composites, woods, plastics, and more. Non-metals work better with gun drills ground specifically for that purpose but standard gun drill grinds will generally work bur may produce less desirable results.

How do you cut plastic with a drill? ›

Drill at least 6 holes in the plastic you want to remove or cut through. Use the small drill bit to drill 6–10 holes in the section of plastic you're trying to cut through or remove. Make these holes as close to one another as possible. This will weaken the structure of the plastic.

Are Brad Point drill bits good for plastic? ›

Brad Point with center point

These drill bits are made especially for drilling plastic. They have cutting ridges on the outside diameter instead of traditional tapered flutes to the center. The center has a point for exact hole location.

Can you drill plastic with a spade bit? ›

Yes, a spade bit can be used on plastic. Spade bits are perfect for drilling through plastic, wood, and plywood. They can easily cut and drill precise holes through them. When drilling through plastic, drive the drill at a slow speed and be very careful.

How do I choose a drill bit for a plastic anchor? ›

Using a drill bit that is the same size as the anchor's body is recommended. It is essential to use a drill bit large enough to drill a hole in the wall, but small enough that you can insert the anchor with your thumb without using a power tool.

Can you screw into plastic? ›

Can you screw into plastic? Yes you can. If you tap a hole into the plastic then you can install a machine screw. If you create a tapered or straight pilot hole you can turn in a thread-cutting or thread-forming screw.

What does a HSS drill bit look like? ›

A HSS drill has a circular shank inserted into the drill and is kept in place by three jaws that tighten around the shank.

How do you cut hard plastic without cracking it? ›

Large-toothed saws or blades should be avoided as they will cause the plastic to break or crack and leave uneven edges. You will need a saw with a fine-toothed blade in order to cut plastic. Make sure your plastic is fixed to a level surface or work surface before using a hacksaw, jigsaw, or fine-toothed saw to cut it.

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