1. Nilesh Zende(Patil) &Aniket Birajdar (Patil)
T.y. Mechanical

2. ◦ Defination:- The limit can be defind as, when two
extreme allowable sizes, between which the actual
size is contained are called limits.
◦ Limits are two extreme allowable sizes of a given
dimensions.
1.Maximum limit of size:-The greater of two is known as
maximum limit of size.
2.Minimum limit of size:-The smaller of two is known as
minimum limit of size.

4.  Defination:- degree of tightness between two
parts.
OR
relationship between two existing parts(i.e.shaft
and hole)

5. 1. Clearance Fit
2. Interference Fit
3. Transition Fit

6.  Always has a gap between two mating parts.
 Shaft size is small , compared to hole size.
 Generally in this type of fit, the lower limit size of
the hole is greater or at least equal to the upper
limit size of the shaft.
 Use:- pivots , latches fit of parts exposed to
corrosive effects etc.

8.  It is a fit where both clearance and interference
may occur in the coupling.
 Here tolerance zones of the hole and shaft are
partly or completely interface.
 Use:- Pulleys and bushing, Flushed bolts etc.

10.  It always overlap & are used mainly for press fits
where the two parts are pushed together, and
require no other fasteners.
 The upper limit size of the hole is smaller or at
least equal to the lower limit size of the shaft.
 Use:-In bearing bushings,flanges etc.

12.  Defination:-It can be defined as the total
permissible variation of size
OR
The difference between the maximum limit and
minimum limit

13. 1. Unilateral tolerance:-varition is permittedin an
direction only from the design size or zero line.
2. Bilateral tolerance:-variation is allowed in both
directions from the design size or zero line.

15. 1. www.engineering fitsandtolerance.com