Question

Which type of fits comes under the category of interference fit?

Answer 1

Explanation:

Engineering fits are generally used as part of geometric dimensioning and tolerancing when a part or assembly is designed. In engineering terms, the "fit" is the clearance between two mating parts, and the size of this clearance determines whether the parts can move independently from each other, or are then temporarily or even permanently joined. Engineering fits are generally described as a "shaft and hole" but are not limited to just round components. ISO is the internationally accepted standard for defining engineering fits, but ANSI is often still used in North America.

ISO and ANSI both group fits into three categories: clearance, location or transition, and interference. Within each category are several codes to define the size limits of the hole or shaft - the combination of which determines the type of fit. A fit is usually selected at the design stage according to whether the mating parts need to be accurately located, free to slide or rotate, separated easily, or resist separation. Cost is also a major factor in selecting a fit, as more accurate fits will be more expensive to produce, and tighter fits will be more expensive to assemble.

Answer 2

Explanation:

Also referred to as a press fit or friction fit, the interference fit requires some degree of force to join two components. Pressing a bushing, bearing, dowel pin or other items into their mating components are all examples of how an interference fit can be used.

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