Specifications and Notes for Component Blueprints

 


1. Technical requirements for parts

The different technical requirements for components during processing and inspection typically include surface roughness, dimensional tolerance, geometric tolerance, heat treatment, and material surface treatment.

2. Dimensional tolerance and fit

1. Interchangeability of parts

Refers to the ability of parts or components manufactured in large quantities to be assembled into a machine without the need for selection or repair, and still meet the specified fit requirements. This means that any part can be used in place of another without any issues, ensuring smooth assembly and operation.


2. Basic concepts of dimensional tolerance

1) Definition and difference between error and tolerance


2) Basic terms of tolerance

Basic Dimension: The dimension provided by the design, such as φ50. Actual Dimension: The dimension obtained by measurement.

Limit Dimension: The two limit values for allowable dimension change based on the basic dimension.

Maximum Limit Dimension: The larger of the two limit dimensions, such as shaft φ50.007 and hole φ50.

Minimum Limit Dimension: The smaller dimension, such as shaft φ49.984 and hole φ49.982.


Learn more: https://machining-cnc.com/specifications-and-notes-for-component-blueprints/

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