Free Running Fit
In terms of manufacturability, answer the following about a
free running fit:
- Is the fit type Clearance, Transition, or Interference?
- What is the ideal use case for a free running fit ?
Expand Hint
Hint 2
A free running fit refers to a fit between two components where there is a relatively large gap.
Here is a breakdown of the three different types of fits for shafts and holes that allow for an engineer to realize a specific design’s intended function:
- Clearance fit is a type of fit in which the diameter of the hole is greater than the diameter of the shaft. This type of fit allows for free movement of the mating parts, and it is often used in applications where the parts need to be able to slide or rotate easily.
- Transition fit is a type of fit in which the diameter of the hole and the diameter of the shaft are very close to each other. This type of fit can provide either a clearance or an interference fit, depending on the exact dimensions of the parts. Transition fits are often used in applications where the parts need to be held in place tightly, but where a small amount of movement is still allowed.
- Interference fit is a type of fit in which the diameter of the hole is smaller than the diameter of the shaft. This type of fit creates a tight, press-fit between the mating parts, and it is often used in applications where the parts need to be held in place very securely.
A free running fit refers to a fit between two components where there is a relatively large gap or clearance fit. It is not intended for high accuracy applications, but it’s useful in situations with large temperature changes, high operational speeds, or significant journal loads. In these specific external load scenarios, material dimensions can drastically change, causing parts to not freely move in an assembly as designed.
- Clearance
- It is not intended for high accuracy applications, but it’s useful in situations with large temperature changes, high operational speeds, or significant journal loads.
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Similar Problems from FE Sub Section: Some Preferred Fits
645. Force Fit
Similar Problems from FE Section: Manufacturability
268. Installing a Bearing
645. Force Fit