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Fundamental Tool & Die Making techniques


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Geometric Tolerances


GDT
ISO tolerance for shafts
ISO tolerance for holes
Surface Roughness
Surface Texture


Quality Control Co

tAQL
Process Capability CPK
Sampling plan
Level I, II, III


Engineering Plastic
Machining of plastic
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Chart of Limits and Fit

Chart limit and fit | ISO tolerances for holes| ISO tolerance for shafts |

Definitions:

Nominal size: The size of a feature of perfect form as defined by the technical drawing.

Deviation: The difference between a size and the corresponding nominal size.

Upper deviation: The difference between the maximum limiting size and the corresponding nominal size of a feature.

Lower deviation: The difference between the minimum limiting size and the corresponding nominal size of a feature.

Tolerance: The difference between the maximum and minimum limits of a part.

Clearance Fit: The fitting that, some gaps between two assembled parts.

Interference Fit: A fit clearance that interference exists between two assembled parts.

Transition Fit: A fit clearances where clearance fit or interference fit can exist between two assembled parts.

GD&T ,Dimensioning and tolerancing a part with respect to the function and application of that mating part.

 

Description
Hole Tol.
Shaft tol
Loose fit
H11
c11
Free running
H9
d9
Easy running
H8
f8
Sliding fit
H7
g6
Close clearance
H8
f7
Location clearance
H7
h6
Slight interference
H7
k6
Transition
H7
n6
Press fit
H7
p6
Medium fit
H7
s6
Force fit
H7
u6

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Materials & Tretment

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