Q:
# What Are Some Engineering Drawing Symbols You Should Know?

Some common engineering drawing symbols you should know include counterbore, countersink, spotface, depth, radius and diameter. These basic symbols help engineers, draftsmen and fabricators read and interpret technical drawings.

Continue ReadingOne frequently used symbol in engineering drawing is counterbore, represented by a line drawing of a square with no top and often labeled C’BORE or CBORE, a cylindrical flat-bottomed hole that enlarges another hole. In mechanical drawings, a counterbore symbol indicates that a fastener, such as screw head, must be flush or below a surface.

Like counterbores, countersinks, represented by a downward pointing arrow (labels CSK or CSINK), show where holes are to be drilled, except a countersink is conical. Countersink symbols usually mark locations of countersink screws (for flush finishes) and can also specify the degree of chamfer of the hole.

Spotface – symbol SF, S/F, SFACE or S/FACE – indicates where a smooth-machined surface is required, such as around a bolt hole where a shallow counterbore is needed, while the symbol for depth, a downward-pointing arrow below and attached to a straight horizontal line, indicates the depth specified of a feature. Two other common symbols in engineering drawings include R, for the radius of an arc or a circle (sometimes rendered as CR for “controlled radius”) and D, diameter of a circle, sometimes also abbreviated DIA or ø.

Learn more about Measurements-
Q:
## How Do You Convert Diameter to Square Inches?

A: To determine the area of a circle from its diameter, divide the diameter by two, square it and multiply by π. The formula for calculating the area of a cir... Full Answer >Filed Under: -
Q:
## How Many Gallons Are in a Round Tank?

A: In order to calculate the gallons in a round tank, the radius and the height of the tank's interior should be measured in feet. The volume is equal to pi t... Full Answer >Filed Under: -
Q:
## How Do You Convert 135 Degrees to Radians?

A: Radians measure angles as the arc length of a circle subtended by an angle, divided by the radius of the circle. Each radian is equal to approximately 57.3... Full Answer >Filed Under: -
Q:
## What Are Some Examples of Objects That Are One Centimeter Long?

A: Some objects which are one centimeter long include the radius of an American penny, the thickness of a standard notepad and the width of the average pinkie... Full Answer >Filed Under: