Tolerances Application

Tolerance Syntax

1. Limits . The high limit value is placed above the low limit value. A single line limit may be shown by placing the low limit before the high limit with a dash between the values.
2. Plus and Minus Tolerancing. The plus and minus and value is placed between the dimension on the left and tolerance value on the right.
3. Geometric Tolerances are applied within control frame to features.

Angle Tolerance

90° and 0° basic angles take on general tolerance of feature control frame.

Where center lines and surfaces are shown at right angles or parallel to each other 90° or 0° basic angles are implied. The tolerance on the feature associated with these implied angles is provided by feature control frames.

Tolerance Decimal Expression

Millimeter tolerances:

1. Where a tolerance value is zero, a single zero used without a plus or minus sign.
2. Use the same number of decimal places adding zeros as needed for bilateral and limit tolerancing.
3. No trailing zeros are added to Basic dimensions.

Inch tolerances:

1. Where a tolerance value is zero, the same number of decimal places are added to match.
2. Use the same number of decimal places adding zeros as needed for bilateral and limit tolerancing.
3. No trailing zeros are added to Basic dimensions.