1. ADVANCED MECHANICAL DRAFTING
LECTURE #10

2. RUNOUT
CIRCULAR RUNOUT
TOTAL RUNOUT

3. RUNOUT feature control frames

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RUNOUT FRAMES
ALWAYS CONTAIN:
Geometric Characteristic Symbol
Tolerance zone thickness
Datum reference
RUNOUT FRAMES
NEVER CONTAIN:
Diameter Symbol
Material Condition modifier

4. RUNOUT tolerance zone shapes
Zone size is thickness of band of tolerance
RUNOUT
Area between two
concentric circles
TOTAL RUNOUT
Volume between two
concentric cylinders

5. APPLICATION OF RUNOUT    DRAWING INTERPRETATION
.002 tolerance zone over entire surface
DATUM AXIS A
Rotate Part
DATUM PLANE B
INTERPRETATION

6. APPLICATION OF RUNOUT    DRAWING INTERPRETATION
.005 tolerance zone at each circular element
DATUM AXIS A
Rotate Part
DATUM PLANE B
INTERPRETATION

7. APPLICATION OF RUNOUT    DRAWING INTERPRETATION
.005 tolerance zone over entire surface
DATUM AXIS A
Rotate Part
DATUM PLANE B
INTERPRETATION

8. COMPOUND DATUMS Allow two different features to act as one datum
Both serve as one datum, neither is primary nor secondary with respect to the other
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

9. Any process which shapes solid metal without cutting
FORGING
Any process which shapes solid metal without cutting
Forging processes
Hammer – swords, horseshoes, etc.
Drop – tools, coins, etc.
Press – same as drop without hard impact
Rolling – plate steel, sheet metal
Upset – fastener heads, spark plug ends, etc.
Extrusion – window frames, wire, etc

10. FORGING CONSIDERATIONS
No tight tolerances
Hot or cold
Mismatch must be controlled
No sharp corners
Draft angles required in deep molds
Phantom lines show chip (areas that must be machined later)
May require two drawings (forging & machining)

11. KNURLING – a forging process
Straight knurl
Increases effective shaft diameter
Used to create a press fit

12. Dimensioning the Straight Knurl per ANSI Y14.5
PITCH 96 STRAIGHT KNURL Ø.512 MIN AFTER KNURLING
Ø.50
BEFORE KNURLING
.62 FULL KNURL

13. KNURLING – a forging process
Raised Diamond knurl
Provides gripping surface
4 sizes available
DP 160 – very fine knurl
DP 128 – fine knurl
DP 96 – medium knurl
DP 64 – coarse knurl
Pitch 96 most common

14. Dimensioning the Raised Diamond Knurl per ANSI Y14.5
PITCH 96 RAISED DIAMOND KNURL
.25
Ø.50
.62 FULL KNURL

15. Application to GSK

16. GSK DESIGN