How to choose a tool for drilling into plastic

The tool selection depends mainly on the hole diameter, material thickness, and the required cut quality.

1️⃣ Small and standard holes

For standard drilling of smaller diameters, the following are used:

• fully ground HSS drill bits
• cobalt HSS-Co drill bits (suitable for harder or tougher plastics)

These tools are suitable for technical parts, plastic covers, mounting panels, or standard construction components.

It is important to work at low to medium speeds and avoid excessive feed pressure.

2️⃣ Gradual hole enlargement

For thin-walled plastics, covers, or mounting panels, the following are very suitable:

• HSS step drill bits
• HSS tube and sheet drills

These tools allow gradual enlargement of the hole without tearing the material and provide better control over the final diameter. They are ideal, for example, when installing electrical components into plastic enclosures or cabinets.

3️⃣ Larger diameters

For larger holes and technical pass-throughs, the following are used:

• bi-metal HSS hole saws
• TCT hole saws for wood and plastic

They are especially suitable for thicker plastic sheets, pipes, or structural components where a larger diameter hole with an even edge is required.

Where and how plastic drilling is used in practice

Drilling into plastic is common in many technical and installation applications:

• plastic covers and boxes,
• electrical enclosures,
• plastic piping,
• mounting panels,
• plastic structural components,
• hobby and industrial use.

In many cases, the part is already a finished visible component where accuracy and a clean hole are important.

How to work when drilling into plastic

When drilling plastic, it is important to prevent overheating of the material.

Basic rules:

• always work without hammer action,
• use lower speeds than when drilling metal,
• do not force the tool,
• during longer drilling, monitor the heating of both the tool and the material.

For thicker materials, it is advisable to drill gradually and, if necessary, take short breaks to prevent melting.

Typical risks

• material melting at high speeds,
• deformation or “pulling” of the hole edge,
• cracking in brittle plastics,
• bit jamming due to excessive feed pressure.

How does the selection continue?

The subcategory “Drilling into Plastic” includes tools for various types of holes:

Drill bits for standard holes

• fully ground HSS drill bits
• cobalt HSS-Co drill bits

Drill bits for gradual enlargement

• HSS step drill bits
• HSS tube and sheet drills

Hole saws for larger diameters

• bi-metal HSS hole saws
• TCT hole saws for wood and plastic

Thanks to this structure, you can select a tool according to the required hole diameter and the type of work.