Question
Download Solution PDFWhich type of fit is used when a small amount of clearance or interference is permissible?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Fit is a relationship that exists between two mating parts, a hole, and a shaft, with respect to their dimensional difference before assembly.
There are three types of fits.
Transition fit: It may sometimes provide clearance and sometimes interference. Here the tolerance zones of the hole and shaft will overlap each other.
Examples: Tight fit and push-fit, wringing fit, press fit.
Clearance fit: Clearance is the difference between the size of the hole and the size of the shaft which is always positive. Here the tolerance zone of the hole will be above the tolerance zone of the shaft.
Examples: Slide fit, easy sliding fit, running fit, slack running fit, and loose running fit.
Interference fit: Interference is the difference between the size of the hole and the size of the shaft which is always negative i.e. shaft is always larger than the hole size. Here, the tolerance zone of the hole will be below the tolerance zone of the shaft.
Examples: Shrink fit, heavy drive fit, and light drive fit.
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