Fit is defined as a degree of tightness or looseness between two mating parts to perform definite function when they are assembled together.
A fit may result either in a movable joint or a fixed joint. For example, a shaft running in a bearing can move in relation to it and thus forms a movable joint, where as, a pulley mounted on the shaft forms a fixed joint.
Types of Fits:
There are 3 types of fits. They are
i) Clearance fit
ii) Transition fit
iii) Interference fit
Clearance fit: In this type of fit the shaft diameter is always less than the hole diameter. For any given shaft and hole assembly clearance fit can be decided by the statement as according to the limits if the upper limit size of the shaft is less than the lower limit size of the hole then that type of fit is known as clearance fit. So that the shaft can slide or rotate through different degree of freedom according to the purpose of the mating parts.
Maximum clearance: It is the difference between the maximum size of the hole and minimum size of the shaft.
Minimum clearance: It is the difference between the minimum size of the hole and maximum size of the shaft.
Clearance Fit
Interference fit: In this type of fit the minimum diameter of the shaft is always greater than the maximum size of the hole. This type of fit between the shaft and hole will give the permanent type of fit and can be used as a solid component.
Elastic strains developed on the mating surfaces during the process of assembly prevent relative movement of the mating parts.
Interference fit
Transition fit: This type of fit lies mid way between clearance fit and interference fit. In this type size limits on the mating parts so selected may give clearance fit or interference fit depending on the actual sizes of the parts.
Transition Fit
A fit may result either in a movable joint or a fixed joint. For example, a shaft running in a bearing can move in relation to it and thus forms a movable joint, where as, a pulley mounted on the shaft forms a fixed joint.
Types of Fits:
There are 3 types of fits. They are
i) Clearance fit
ii) Transition fit
iii) Interference fit
Clearance fit: In this type of fit the shaft diameter is always less than the hole diameter. For any given shaft and hole assembly clearance fit can be decided by the statement as according to the limits if the upper limit size of the shaft is less than the lower limit size of the hole then that type of fit is known as clearance fit. So that the shaft can slide or rotate through different degree of freedom according to the purpose of the mating parts.
Maximum clearance: It is the difference between the maximum size of the hole and minimum size of the shaft.
Minimum clearance: It is the difference between the minimum size of the hole and maximum size of the shaft.
Interference fit: In this type of fit the minimum diameter of the shaft is always greater than the maximum size of the hole. This type of fit between the shaft and hole will give the permanent type of fit and can be used as a solid component.
Elastic strains developed on the mating surfaces during the process of assembly prevent relative movement of the mating parts.
Transition fit: This type of fit lies mid way between clearance fit and interference fit. In this type size limits on the mating parts so selected may give clearance fit or interference fit depending on the actual sizes of the parts.
Transition Fit
nicely done
ReplyDeletecould not understand the transition fit . please explain .
ReplyDeleteWait
DeleteIf the maximum hole size is greater than smaller size of shaft or minimum hole size is lesser than maximum size of shaft, such type is called transition fit. In this type some of the assemblies can be done without application of force and for some assemblies force will be required.
ReplyDeletePlease give me some examples
ReplyDeletePlease give me some examples
ReplyDeletegive me some example of all fits plzzz...
ReplyDeletein g-mail ..plz patelanand7844@gmail.com
plzzz....
Just consider a easy one like shaft in a hole.
DeleteExcellent
ReplyDeleteExcellent
ReplyDeleteExcellent
ReplyDeleteIf 26H24S then which fit is perfect anybody can telling me?
ReplyDeleteINTERFERANCE fit @ rakesh
DeletePLZ TELL ME WHAT IS SLIDING FIT AND HOW TO MAKE SLIDING FIT OF BEARING INSIDE A PIPE
ReplyDeleteI read theare is also 4th type of fit called line fit pls give me detail about this type of fit.
ReplyDeleteI read theare is also 4th type of fit called line fit pls give me detail about this type of fit.
ReplyDeleteamazing content
ReplyDeletei wasn't getting it but you made it so easy and much simple to understand really great work. hats off
Can you state some examples of types of clearance fits , example of slide fit etc
ReplyDeleteexcellent
ReplyDeletePlz explain
ReplyDeleteThanks you
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For more info on Types of fits, you can visit the below link Types of Fits (3)-Clearance Fit,Transition Fit, Interference Fit, Selective Assembly, FMS [With PDF]
ReplyDeleteNice
ReplyDeleteNice Explanation
ReplyDelete