Tolerances

• Hold precise tolerances for interchange ability
• how much a dim can vary

Terms

• Basic size- exact size
• Tolerance- amount  a dim can vary from basic size
• feature-identify geometry
• limits of size- max or min from exact size
• allowance-limits where smallest clearance of largest interference occurs measured at mmc

Maximum Material condition

• limit of a dim where the max material is left on the part

Least material Condition

• limit of dim where least amount of maaterial is left on part
• Types of fit
• Clearance-space between parts
• Interference- force fit
• Transition-diff combos, diff fits