The number of fundamental tolerance in the Indian Standard System are:
18
Explanation:
Limits and fits comprise 18 grades of fundamental tolerances for both shaft and hole, designated as IT01, IT0 and IT1 to IT16.
These are called standard tolerances.
Grades o f Tolerance: Grade is an indication of the level of accuracy.
IT grades | Used for |
IT01 to IT4 | For the production of gauges, plug gauges, measuring instruments |
IT5 to IT7 | For fits in precision engineering applications |
IT8 to IT11 | For General Engineering |
IT12 to IT14 | For Sheet metal working or press working |
IT15 to IT16 | For processes like casting, general cutting |
Similar Questions
The difference between the maximum limit of size and minimum limit of size in assembling a product is known as:
In an assembly, Hole size is smaller than shaft size then this type of fit is known as ______
When two mating parts are sometimes, an interference fit and sometimes a clearance fit is known as _____
The measured size of the dimension of a component is called ______ size.
The tolerance limit is 50.3 ± 0.05 mm.
What is this shown?
When tolerance is given on both sides of the basic dimension, it is called:
- When tolerance is given on one side of the basic dimension, it is called:
- The measured size of the dimension of a component is called:
- Which type of fit is used when a small amount of clearance or interference is permissible?
- Two extreme permissible sizes of a part, between which actual size should lie is called _____
Important Questions from Limits and Fits
Which one of the following dimensions shows the largest tolerance?
In mass production, parts made to definite limit of error is called as ______
In a hole basis system, the lower deviation for the hole ‘H’ is
Name the fit, in which the shaft is cooled below the room temperature until it fits into the hole, then assembly is allowed to attain room temperature.
The type of fit in which the female part is fitted when male part is in hot condition is called _____
