Casting

It is the production of metal components by pouring molten metal into moulds and allowing it to solidify. It can also be a metal component produced by casting.

Figure 7.2 A typical method used to show tolerances for holes and shafts (source: College of Engineering, Ohio State University).

FLATNESS & STRAIGHTNESS

ANGULARITY

PERPENDICULARITY

PARALLELISM

CONCENTRICITY

TRUE POSITION

ROUNDNESS SYMMETRY

MAXIMUM MATERIAL CONDITION (MMC)

REGARDLESS OF FEATURE SIZE (RFS)

DATUM IDENTIFYING SYMBOL

Figure 7.3 Examples of geometric symbols used in industrial drawings.

Figure 7.4 Fillets and rounds.

Figure 7.5 Examples of slot and slide arrangements.

TEE SLOT DOVETAIL SLOT

Figure 7.5 Examples of slot and slide arrangements.

Figure 7.6 Diagram showing three types of keys, a keyseat and a keyway (source: Blueprint Reading and Sketching, Navedtra 14040).

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