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Machine Processing - Tolerance Grades

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A tolerance is the total permissible variation of size. where the tolerance is the difference between the limits of size.

Range of tolerance grades that various machine processes may produce under normal conditions:

Machine Processing - Tolerance Grades
Tolerance Grades
45678910111213
Lapping and Honing
Cylindrical Grinding
Surface Grinding
Diamond Turning
Diamond Boring
Broaching
Reaming
Turning
Boring
Milling
Planning and Shaping
Drilling

ANSI B4.1 Standard Tolerances are indicated in the diagram below:

  • 1 in (inch) = 25.4 mm
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Related Topics

Miscellaneous

Engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more.

Related Documents

ASME - American Society of Mechanical Engineers

ASME is one of the leading organizations in the world developing codes and standards.

Building Tolerances

Typical tolerances for floors, walls, columns and more.

DFA - Design for Assembly index

Design for Assembly Index indicates how easy it is to assembly a component.

JIS - Japanese Industrial Standards

Japanese Standards Association - JSA.

Sandpapers - Grit Sizes

Grit sizes ranging 12 - 600.

Scales of Objects

The relative scale of objects.

Surface Roughness vs. Abrasive Grain Size

U.S. mesh size vs. surface roughness.

Surface Roughness vs. Mechanical Processing

Mechanical production methods and their surface roughness.

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