Everything You Need to Know About Engineering Drawing Arrowheads

In engineering drawing, it is important to use the correct type of arrowhead to convey the desired meaning. Knowing which type of arrowhead to use in various circumstances can be a challenge, so here is everything you need to know about engineering drawing arrowheads.

Types of Arrowheads

The most common types of arrowheads used in engineering drawings and other technical drawings are blunted, closed, and open. Each type has its own specific purpose.

Blunted Arrowheads

Blunted arrowheads are used to indicate that the line terminates in an area or a point, or that the line extends in all directions. This type of arrowhead looks like a small dot or circle at the end of the line.

Closed Arrowheads

Closed arrowheads are used to indicate that the line is a leader or reference line, or that the line terminates in a point. This type of arrowhead looks like a solid triangle at the end of the line.

Open Arrowheads

Open arrowheads are used to indicate that the line is a center line, or that the line extends to infinity in one direction. This type of arrowhead looks like a hollow triangle at the end of the line.

Guidelines for Using Arrowheads

When using arrowheads in engineering drawings, it is important to follow the standard conventions. For example, when using the open arrowhead to indicate that the line extends to infinity in one direction, the arrowhead should always point in the direction in which the line extends.

It is also important to remember that the size of the arrowhead should be proportional to the thickness of the line. For example, a thicker line should have a larger arrowhead than a thinner line.

Conclusion

In engineering drawing, it is important to use the correct type of arrowhead to convey the desired meaning. The most common types of arrowheads used in engineering drawings are blunted, closed, and open. When using arrowheads in engineering drawings, it is important to follow the standard conventions and to ensure that the size of the arrowhead is proportional to the thickness of the line.

Engineering