Machining Fundamentals

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Dual dimensioning • A system that employs the US Conventional system of fraction or decimal dimensions and metric dimensions on the same drawing. • If the drawing is intended primarily for use in the United States, the decimal inch will appear above the metric dimension.
Metric Dimensioning • All of the dimensions on the drawing are in the SI Metric system, usually in millimeters. • Until there is full conversion to metric in the United States, a conversion chart will appear on the drawing.
Page 1 and 2: Machining Fundamentals Understandin
Page 3 and 4: Drawings • Range from a simple fr
Page 5: Fractional Dimensioning • Drawing
Page 9 and 10: Materials • The general classific
Page 11 and 12: Surface Finishes • A machinist co
Page 13 and 14: Tolerances • Are allowances, eith
Page 15 and 16: Quantity of Units • Shown on the
Page 17 and 18: Assembly or Subassembly • Necessa
Page 19 and 20: Names of the Object • A portion o
Page 21 and 22: Blueprints • Blueprint is often u
Page 23 and 24: Xerographic (electrostatic) Process
Page 25 and 26: Computer-Generated Prints • Print
Page 27 and 28: Working Drawings • Detail drawing
Page 29 and 30: Parts List • Parts are identified
Page 31 and 32: US Conventional Sheet Sizes • A s
Page 33 and 34: Geometric dimensioning and Toleranc
Page 35 and 36: Geometric Characteristic Symbols
Page 37 and 38: Basic Dimension • A numerical val
Page 39 and 40: Reference Dimension • Is a dimens
Page 41 and 42: Feature • Is a general term appli
Page 43 and 44: Maximum Material Condition (MMC)
Page 45 and 46: Regardless of Feature Size (RFS)
Page 47 and 48: Actual size • The measured size o
Page 49 and 50: Application of Geometric Dimensioni
Page 51 and 52: Flatness • Is a measure of the va
Page 53 and 54: Circularity • Is characterized by
Page 55 and 56: Profile Geometric Tolerances • Co
Page 57 and 58:
Profile Surface Geometric Tolerance
Page 59 and 60:
Angularity • Is concerned with th
Page 61 and 62:
Perpendicularity Geometric Toleranc
Page 63 and 64:
Parallelism Geometric Tolerance •
Page 65 and 66:
Concentricity • Defines the relat
Page 67 and 68:
Symmetry • Indicate equal or bala
Page 69 and 70:
Run-out Geometric Tolerances • To
Page 71:
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Machining Fundamentals

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