2.1.1 Tolerances

Front

What is a tolerance in engineering and manufacturing?

Back

A tolerance is the permissible limit or limits of variation in a physical dimension, which allows for acceptable performance and fit of parts.

Front

What are the two main types of tolerances?

Back

The two main types of tolerances are unilateral and bilateral tolerances.

Front

Define unilateral tolerance.

Back

Unilateral tolerance allows variation in only one direction from the nominal dimension.

Front

Define bilateral tolerance.

Back

Bilateral tolerance allows variation in both directions from the nominal dimension.

Front

What is limit dimension?

Back

Limit dimension specifies the maximum and minimum permissible sizes of a part.

Front

How is tolerance calculated for limit dimensions?

Back

Tolerance is calculated by subtracting the minimum dimension from the maximum dimension.

Front

If a part has a maximum dimension of 5 11/16" and a minimum dimension of 5 1/2", what is the tolerance?

Back

3/32".

Front

What does the notation 3.00 ± 0.02 mean?

Back

It means the dimension is 3.00 inches with a tolerance of plus or minus 0.02 inches, allowing for a range of 2.98 to 3.02 inches.

Front

What is the total tolerance for a dimension of 3.00 ± 0.02?

Back

0.04.

Front

What is the purpose of using tolerances in engineering?

Back

Tolerances ensure that parts fit together properly and function as intended, even with slight variations in size.