Description
1/4 Inch Plastic Drill Bit is specifically designed for drilling clean, chip-free holes in acrylic, polycarbonate, and other plastic materials. Unlike standard drill bits made for wood or metal, this specialized bit features a 90° point angle and 0° rake angle that prevents cracking, chipping, and stress fractures common when using conventional bits on plastics. The geometry cleanly slices through plastic without grabbing or melting the material.
ShapesPlastics' 1/4" plastic drill bit is made from high-speed steel (HSS) for durability and works excellently with both hand drills and drill presses. The 1/4" shank diameter fits standard drill chucks. Perfect for drilling mounting holes, fastener clearance holes, or any application requiring precise 1/4" holes in acrylic sheets, polycarbonate panels, HDPE, ABS, PVC, and other thermoplastics. This common size is ideal for standard hardware and fasteners. Professional fabricators and DIY enthusiasts rely on these specialized bits for clean results without material damage.
Features
- 1/4 inch (0.250") diameter
- 90° point angle for accurate starting
- 0° rake angle prevents chipping
- High-speed steel (HSS) construction
- Produces clean, chip-free holes
- Works with hand drills and drill presses
- 1/4" shank diameter
- Designed specifically for plastics
- Prevents stress cracks
- Professional quality
Applications of 1/4" Plastic Drill Bit
- Acrylic Sheet Drilling
- Polycarbonate Panel Holes
- Fastener Clearance Holes
- Mounting Hardware Installation
- Display Case Assembly
- Sign Making
- HDPE Fabrication
- Marine Board Drilling
- Cabinet Door Glazing
- General Plastic Fabrication
Frequently Asked Questions
Why can't I use a regular drill bit on plastic?
Regular drill bits designed for wood or metal have aggressive rake angles that grab and pull through material. On plastic, this causes chipping, cracking, melting from friction, and stress fractures around the hole. Plastic drill bits have a 0° rake angle that cleanly slices through plastic without grabbing, producing smooth, chip-free holes without damage.
What materials can I drill with this bit?
This bit works on acrylic (plexiglass), polycarbonate (Lexan), HDPE, ABS, PVC, PETG, and most other thermoplastics. It's specifically engineered for softer, more brittle plastics that crack easily with standard bits. The 1/4" size is perfect for standard mounting hardware and fasteners. Not recommended for fiberglass or reinforced materials.
Should I use high or low drill speed?
Use moderate speeds (500-1500 RPM) for best results. Too fast causes friction and melting. Too slow causes chipping. Apply steady, light pressure and let the bit do the work. For hand drills, a medium speed setting works well. Back the bit out occasionally to clear chips and prevent heat buildup, especially important with larger diameter bits like 1/4".
Do I need to clamp the plastic when drilling?
Yes, always secure plastic material firmly before drilling. Unsecured material can grab, spin, or crack. Use clamps or a vise, and place scrap wood underneath to prevent blowout on the backside. This is especially important with larger bits like 1/4" which generate more torque. Never hold small pieces by hand while drilling.
