7.6 Flashcards
What size is biggest and smallest drill diameter?
Z biggest
A smallest
What are the 3 types of fit?
Clearance
Interference
Transition
How many classifications do ISO provide?
28
What are the 2 grades of bilateral holes?
A and B
What is the difference to class A and B?
Class A is more Accurate than class B
What are the 2 grades of press fit?
F and D
What’s the class of transition fit?
P
What are the 3 class of clearance fit?
Z, Y and X
What is the remark for interference (F) fittings?
Mechanical pressure
What is a remark for Driving (D) fittings?
Less tight than force fit one part can be driven into another
What is a remark for push (P) fittings?
Suitable for detachable parts but not moving
What is a remark for clearance/Running (X, Y Z) fittings?
What is special about Z
Suitable for moving Parts
Z is finest
What is deviation?
Difference between a size and corresponding size
What is FIt?
Mating shaft and hole
What is clearance?
And what does it allow
Shaft smaller than hole allows for movement