State the difference between Unilateral and Bilateral Tolerance?

Answer: 

unilateral tolerance:

unilateral tolerance is tolerance in which variation is permitted only in one direction from the specified direction. e.g., 1900 +0.000/-0.060. 

Bilateral tolerance:

Bilateral tolerance is tolerance in which variation is permitted in both directions from the specified direction. e.g., 1900 +0.060/-0.060

Category: Mechanical Engineering
Tag: Tolerances