1. Mach 112 Cutting Tools & Measurement
Layout Tools

2. Objectives
Identify tools used in performing precision and semi-precision layout.
Understand the various uses and techniques for properly using layout tools.

3. Layout Solution (Dykem)

4. Scribers

5. Dividers
Fig. E-9 Setting divider points to an engraved rule.

6. Trammels
Fig. E-12 Trammel point used to scribe large arcs and circles.

7. Hermaphrodite Calipers

9. Combination Square

10. Cast iron & semisteel surface plates are made from good- quality castings that have been allowed to age, thus relieving internal stresses.
Fig. E-1 Cast iron surface plate.
Fig. E-2 Granite surface plate.
Granite is superior to metal because it is harder, denser, impervious to water, and if chipped, the surrounding flat surface is not affected.

11. Surface Gage

12. Height Gage

13. Layout Accessories

15. Prick Punches & Center Punches

17. Bolt Patterns

18. Bolt Patterns

19. QUESTIONS?