How to Drill Plastic Without Cracking It: The Right Drill Bit Makes All the Difference
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Whether you're working with acrylic, polycarbonate, PVC, or other plastics, drilling clean holes can be frustrating if you use the wrong drill bit. One wrong move can leave you with cracked material, chipped edges, or melted plastic.
With the proper technique and more importantly, the right drill bit you can produce clean, professional-looking holes every time.
Most standard twist drill bits are designed for steel and other metals. Their aggressive 118° or 135° point tends to grab the plastic as they break through, creating excessive stress that often results in cracks or chips. Unlike standard metal drill bits, acrylic point drill bits are ground with a 60° point that gently cuts into the material instead of aggressively pulling itself through.
Tips for Drilling Plastic Like a Professional
1. Use the Correct Drill Bit
This is the single biggest factor in preventing damage.
Choose an acrylic point drill bit with a 60° tip whenever drilling brittle plastics.
2. Clamp the Material Securely
Movement creates vibration, and vibration creates cracks.
Always clamp your work piece firmly before drilling.
3. Support the Back Side
Place a scrap piece of wood beneath the plastic.
Backing material supports the sheet as the drill exits, reducing breakout and edge chipping.
4. Run the Correct RPM
RPM is an important factor when drilling plastics.
Use the proper RPM for the size bit you are using. A good drill set will have a RPM guide.
5. Apply Light Pressure
Let the drill bit do the work.
Heavy feed pressure increases stress and can cause cracking, especially near breakthrough.
6. Keep the Drill Bit Sharp
A dull drill bit creates heat instead of cutting cleanly.
Sharp bits leave smoother holes and reduce the chance of damaging the work piece.
If you're tired of cracked acrylic and chipped plastic, upgrading to a 60° acrylic point drill bit is one of the easiest improvements you can make.
Designed specifically for plastics, these specialty drill bits produce cleaner holes, reduce stress on the material, and help eliminate the cracking that commonly occurs with standard twist drills.
Need a 60° acrylic drill set? Browse our line of plastic drill bits below!