Class of Fit
It is important that mechanical parts with tolerances that allow for certain types of operation of the two parts. There are a number of systems that classify the dimensional tolerances between parts for different applications.
A fit that always enables clearance between the hole and shaft of a coupling.
A fit between a hole and a shaft where both clearance and interference may occur in the coupling.
A fit between a hole and a shaft where there is always some interference between the two.
Subjects: Mechanical Engineering
- Tolerance and Fit - mitcalc.com Selection of suitable fits of machine parts according to the international standard ISO 286, ANSI B4.1 and ISO 2768.