Fits, Limits, and Tolerances

Basics

• This page goes over Fits, Limits, and Tolerances, and the application of them in design
• Essentially nothing is perfect, and getting something closer to perfect is costly/time intensive (see degrees of flatness / Lapping and whatnot) so you define what is acceptable for the application (ie specific hole for a shaft, etc)
• By doing this ahead of time, you take the need for "fiddling" out of the assembly / iterative design process
• Press Fit is a common example

External Links

• The Wikipedia Page on Limits and Fits
• The Wikipedia Page on Engineering Fits
• The Wikipedia Page on Engineered Tolerances