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Fits & Tolerances
Tolerance Dimensioning ,[object Object],[object Object],[object Object]
Tolerances The Tolerance is 0.001” for the Hole as well as for the Shaft
Allowance & Clearance Interchangeable Fit
Size Designations ,[object Object],[object Object],[object Object],[object Object]
Fits Between Mating Parts ,[object Object],[object Object],[object Object],Minimum air space is 0.002”. This is the allowance and is always positive in a clearance fit
[object Object]
[object Object]
[object Object]
Basic Hole System ,[object Object],[object Object],[object Object],[object Object],Minimum clearance: 0.500”-0.498” = 0.002” Maximum clearance: 0.502” – 0.495” = 0.007”
Basic Shaft System ,[object Object],[object Object],[object Object],[object Object],Minimum clearance: 0.502”-0.500” = 0.002” Maximum clearance: 0.505” – 0.499” = 0.006”
Specifications of Tolerances ,[object Object],The high limit is placed above the low limit. In single-line note form, the low limit precedes the high limit separated by a dash
Specifications of Tolerances ,[object Object],[object Object],[object Object]
Cumulative Tolerances
Tolerances Related to Machining Processes
Terms related to Metric Limits & Fits
Some Definitions ,[object Object],[object Object],[object Object],[object Object]
Some Definitions ,[object Object],[object Object]
[object Object],They are a set of tolerances that varies according to the basic size and provides a uniform level of accuracy within the grade.
 
Definitions ,[object Object],[object Object]
[object Object],[object Object]
[object Object]
[object Object]
 

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Ppt Fits Tolerances[1]