In transition fit size of shaft _______ hole size.

Explanation:

Fit:

• It is the relationship that exists between two mating parts, a hole, and a shaft, with respect to their dimensional differences before assembly.

Types of fits:

Clearance fit:

• It is a fit that always provides clearance.
• Here the tolerance zone of the hole will be above the tolerance zone of the shaft.

Interference Fit:

• It is a fit that always provides interference.
• Here the tolerance zone of the hole will be below the tolerance zone of the shaft.

Transition fit:

• It is a fit which may sometimes provide clearance, and sometimes interference.
• When this class of fit is represented graphically, the tolerance zones of the hole and shaft will overlap each other.
• In transition fit, the size of the shaft can be more or less than the hole size.