What Is a Circle Cutter?
A circle cutter is a tool designed for use with a rotary tool to drill holes. Its unique feature is the ability to adjust the hole size freely. At its core is a center drill that acts as the axis, with a blade attached to a horizontally extending bar.
Circle cutters are versatile, supporting a wide range of materials such as plastic, wood, plaster, and metal. Choosing the appropriate circle cutter and blade for the material is crucial. Available in single-blade and double-blade types, each offers distinct advantages and considerations.
Uses of Circle Cutters
Circle cutters are indispensable for various construction and DIY projects, enabling efficient drilling of holes for wiring and piping. Their adjustable hole size feature eliminates the need for multiple hole saws, enhancing work efficiency and reducing the need for a large assortment of tools.
Principle of Circle Cutters
The circle cutter operates with a central drill and drills holes using blades located at the ends of extendable bars. Hole sizes are adjusted by sliding the blade along the bars. A separate rotary tool, such as an electric screwdriver or drill, is necessary for operation. The choice between tools depends on the material’s hardness, with drills preferred for harder substances.
Some center drills come with a pre-threaded design, which may not be suitable for all drilling machines, especially if there’s a risk of lifting the workpiece.
How to Select Circle Cutters
Consider these six factors when choosing a circle cutter:
1. Hole Size
The maximum hole size achievable by a circle cutter is determined by the length of its bar. Ensure the selected circle cutter can accommodate the required hole size.
2. Material of the Workpiece
Select a circle cutter based on the workpiece material. Using a tool designed for wood on metal can damage the tool and pose safety risks. Always verify the circle cutter’s material compatibility.
3. Thickness of the Workpiece
The workpiece thickness is another critical consideration. Verify the drilling depth capability of the circle cutter to ensure it can handle the workpiece thickness.
4. Blade Type
Circle cutters come in “1-blade” and “2-blade” variants. Single-blade models are cost-effective but less stable, while double-blade models offer greater stability and precision. Choose based on stability needs and budget.
5. Replacement Blade
Opt for circle cutters from manufacturers that offer replacement blades to ensure longevity and compatibility.
6. Safety Stopper
A safety stopper is essential to prevent blade ejection. Exercise caution when selecting budget-friendly, foreign-made options.