Technical Drawing Compass
Description
A Technical Drawing Compass is a hand tool used in drafting to draw circles, arcs, and precise curves. It consists of two adjustable legs, one with a pointed needle and the other with a pencil or lead.
Uses
- Drawing circles and arcs
- Marking equal distances
- Creating geometric constructions
- Used in engineering and technical drawing
Parts
- Legs (pivot and pencil leg)
- Needle point
- Pencil or lead holder
- Hinge or joint
- Adjustment screw
Material
- Steel or brass body
- Hardened steel needle
- Plastic or metal pencil holder
Working Principle
The Technical Drawing Compass works on the principle of rotation about a fixed point. The needle point acts as a pivot, and the pencil rotates around it to draw circles or arcs with a constant radius.
Advantages
- High accuracy in drawing circles
- Easy to adjust radius
- Simple and reliable tool
- Essential for geometric constructions
Safety Precautions
- Handle the sharp needle carefully
- Keep the compass properly tightened
- Avoid excessive force while drawing
- Store safely after use
Conclusion
The Technical Drawing Compass is a fundamental tool in drafting and engineering drawing. Its precision and simplicity make it indispensable for accurate geometric work.