Basics of Tolerance

Provided by: ToolingU

Every manufactured part must meet certain specifications. Tolerances describe the range of acceptable measurements in which a part can still perform its intended function. Tolerance ranges typically describe a linear measurement. Surface texture can require a certain tolerance as well. Tolerances attempt to balance the use of a product with the cost required to produce that product. Improper tolerancing can result in parts that do not function in the way they were intended or parts produced with dimensions that are more precise than necessary, adding unwanted cost to production. After the class, users will be able to describe common methods used for part tolerancing, as well as the impact tolerances have on part production and quality.

Course Objectives:

  • Identify why measurements are important in a manufacturing environment
  • Define tolerance
  • Identify how tolerance is determined
  • Describe the impact of tolerance on cost
  • Compare tolerances possible in machining operations
  • Identify methods of describing tolerance
  • Identify advantages of different tolerance methods
  • Identify elements of tolerance for holes
  • Describe elements of surface tolerance
  • Identify the relationship between dimensions and tolerance.

Recommended Background

  • Recommended for manufacturing personnel, including technicians, engineers, and managers

Course ID







Communication, Critical Thinking, Personal Effectiveness, Part Tolerancing, Part Production/Quality

Method of Delivery


Estimated Effort

1.5 hrs



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