You’ve just received your new 2D printed number plate and you’re ready to fit it to your vehicle. But as you pick up your drill, a worry crosses your mind: what if the plate cracks? It’s a valid concern. Acrylic and polycarbonate materials can be brittle, and the last thing you want is to ruin a perfectly good plate before it even makes it onto your car.
The good news is that yes, you can drill a 2D number plate without cracking it, provided you use the right technique, tools, and a bit of patience. Thousands of drivers successfully drill their plates at home every day. In this guide, we’ll walk you through exactly how to do it safely, what tools you’ll need, and when you might want to consider alternative fixing methods instead.
Before we look at drilling techniques, it helps to understand what your plate is made from. Most modern 2D plates are manufactured from either acrylic or polycarbonate plastic. Both materials are:
However, these materials can crack under certain conditions, particularly during drilling. The key factors that cause cracking are:
Understanding these risk factors is the first step to successful drilling. The techniques we’ll cover address each of these issues.
Gathering the right tools before you start makes the job easier and reduces the risk of mistakes. Here’s what you should have ready:
Essential tools:
Optional but helpful:
Most of these items are standard in any household toolkit. If you’re buying new drill bits, choose ones specifically designed for plastic or general purpose bits marked as suitable for acrylic. These typically have a sharper point angle and polished flutes that reduce friction.
Follow these steps carefully to drill your plate safely and avoid cracking.
Before you drill anything, decide where your fixing holes need to be. Most vehicles have existing mounting points, so you’ll need to align your new plate with these.
If your vehicle’s mounting points don’t align well with your new plate, you might need to drill new holes in the bumper rather than the plate. Alternatively, consider using adhesive pads instead, which we’ll discuss later.
For guidance on different plate sizes and mounting considerations, see our article on smaller 2D number plates.
Proper preparation is crucial for clean, crack free drilling.
Now for the actual drilling. Take your time with this step.
Once all holes are drilled:
If everything looks good, you’re ready to fit your plate to the vehicle. For detailed fitting instructions, see our guide on how to replace a 2D number plate at home.
Even with the best intentions, things can go wrong. Here are the most common mistakes and how to prevent them:
Mistake: Drilling too fast
High drill speeds generate friction heat that melts the plastic or creates stress fractures. Always use slow to medium speed, especially as you break through the back of the plate.
Mistake: Using a blunt drill bit
Dull bits tear rather than cut cleanly, putting excessive stress on the material. Always use sharp bits, and if you’re drilling multiple plates, check the bit condition regularly.
Mistake: Drilling without backing support
Drilling a plate held in the air or flexing on an uneven surface almost guarantees cracks. Always use a solid, flat backing board.
Mistake: Positioning holes too close to edges
Holes within 10mm of the edge leave insufficient material strength. Keep holes at least 15mm from any edge for best results.
Mistake: Applying too much pressure
Forcing the drill creates point stresses that cause cracks. Let the bit cut at its own pace with gentle, consistent pressure.
Mistake: Skipping the tape step
Masking tape really does make a difference. It reinforces the entry and exit points and prevents chipping or micro cracks that can spread later.
Drilling isn’t your only option for fitting number plates. Depending on your vehicle and preferences, these alternatives might suit you better:
Double sided adhesive pads designed for number plates offer several advantages:
The downsides are that adhesive pads work best on clean, non textured surfaces, and they’re not as secure as screws in the long term. They can also fail in extreme temperatures or if exposed to jet washers.
Adhesive pads are included with many plates and are ideal if you’re nervous about drilling or your vehicle has a textured bumper that makes drilling difficult.
Many suppliers, including Number Plate Clinic, offer plates with holes already drilled to standard positions. When you search for your registration and place an order through our shop, you can specify whether you’d like pre drilled holes.
Pre drilled plates are manufactured on professional equipment that ensures perfect hole placement and eliminates home drilling risks. If your vehicle has standard mounting points, this is often the simplest option.
Some number plate frames and clip systems allow you to fit plates without drilling either the plate or the vehicle. These work particularly well for certain vehicle types and are worth considering if you change plates frequently.
Browse our range of number plate accessories to see what fixing options are available.
Different vehicle types may present unique challenges:
Motorcycles: Motorcycle plates are smaller and thinner than car plates, making them more prone to cracking. Extra care with drilling speed and backing support is essential. Many riders prefer pre drilled plates or alternative mounting systems.
Specialist vehicles: Cars with unusual bumper shapes or mounting requirements, such as those needing hex Lambo style plates or short number plates, may benefit from professional fitting advice. Contact us if you’re unsure about the best approach for your vehicle.
Classic cars: Older vehicles sometimes require pressed metal plates rather than modern acrylic versions. Metal plates drill differently and are generally more forgiving, though they can rust if holes are left unprotected.
Despite your best efforts, cracks can happen. Here’s what to do:
Minor surface cracks: Small hairline cracks that don’t affect the printed characters or structural integrity might not require immediate replacement, but should be monitored. If they spread or the plate shows signs of stress, replace it.
Cracks through characters or major structural damage: These render the plate non compliant and potentially unreadable by ANPR cameras. You’ll need to replace the plate immediately to avoid MOT failure or enforcement issues. See our guide on what happens if ANPR cameras cannot read your 2D number plate for more information on readability requirements.
Drilling errors: If you’ve drilled holes in the wrong position or the plate cracked during drilling, you’ll need a replacement. The good news is that replacement plates are affordable, and having made the mistake once, you’ll be more careful next time.
When ordering a replacement, you’ll need the same documentation as your original order. Our article on what documents you need to buy 2D number plates explains the requirements, or if you don’t have your V5C to hand, see our guide on buying plates without a V5C logbook.
If you’ve damaged a plate through drilling, our guide on what to do if your number plate falls off includes advice on emergency replacements.
What size drill bit should I use for number plate screws?
Most standard number plate screws require a 4mm or 5mm hole. Check your screws first or measure the shaft diameter. When in doubt, start with 4mm, as you can always widen the hole if needed.
Can I use a hand drill instead of an electric drill?
Yes, a hand drill or even a manual bradawl can work for thin plates. The key advantage is better speed control, though it requires more effort. The same principles apply: slow, steady pressure with backing support.
Will drilling void my warranty?
Most suppliers don’t offer warranties against customer drilling damage, as it’s considered normal installation. However, if your plate was defective or cracked before drilling, that would typically be covered. Check your supplier’s terms before starting.
Should I drill from the front or back of the plate?
Always drill from the front (printed side). This ensures any exit tear or burr occurs on the back where it won’t affect the visible surface or printed characters.
Drilling a 2D number plate without cracking it is entirely achievable with the right approach. The key elements are using sharp drill bits, working slowly, providing proper backing support, and not applying excessive pressure. Most people who follow these guidelines successfully drill their plates on the first attempt.
That said, if you’re nervous about the process or you’ve had a plate crack before, don’t hesitate to consider alternatives like adhesive pads or ordering pre drilled plates. There’s no shame in choosing the easier route, especially when replacement plates cost money and time.
At Number Plate Clinic, we manufacture all our 2D printed number plates to British Standard BS AU 145e using quality materials designed to withstand careful drilling. If you’re unsure about the best fixing method for your vehicle or you’d like to discuss pre drilled options, our team is here to help. Just get in touch with your questions.
Remember, taking your time and following proper technique makes all the difference. Whether you’re replacing a damaged plate or fitting a new style, a little care during installation ensures your plates look great and stay secure for years to come.
