Blueprint Terms & Def #1

Front

Making a flat surface perpendicular to a specific diameter and depth, usually less than .030"

Back

Spot Face

Front

A circular projection on a casting.

Back

Boss

Front

A surface that is tapered at an angle other than a right angle to a reference surface.

Back

Bevel

Front

Enlarging a portion of a hole to a specific diameter and depth, usually greater than .030"

Back

Counterbore

Front

Heating a metal piece to a high temperature to soften it, and allowing it to cool slowly.

Back

Anneal

Front

A series of small diamond-shaped or straight impressions pressed into a metal surface.

Back

Knurl

Front

Hardening the outer surface of a steel part, forming a hard case on the metal while leaving the inner metal soft.

Back

Case Harden

Front

Two or more surfaces that are the same apart at all points that never intersect.

Back

Parallel

Front

Cutting a relief in a diameter near a shoulder.

Back

Neck

Front

The process of finishing a drilled hole to an accurate size.

Back

Ream