1. REPRESENTATION OF
SPRINGS
GEARS
AND OTHER ELEMENTS

2. SPRINGS
Compression springs
Tension springs
Torsion springs
Leaf springs
Cup springs
Spiral springs

3. Compression springs

4. Tension springs

5. Torsion springs

6. Leaf springs

7. Cup springs

8. Spiral springs

9. Different Gear Pairs

10. Terminology in gears

11. REPRESENTATION OF GEARS
As a fundamental principle, a gear is represented (except in axial section) as a solid part without teeth, but with the addition of the pitch surface in a thin long chain line.
Teeth - Specify the teeth profile either by reference to a standard or by a drawing to a suitable scale.
If it is essential to show one or two teeth on the drawing itself draw them as thick continuous lines

12. Bevel gear
Root
Spiral gear

13. - If mating gears are represented, the direction of the teeth should he shown on one gear only.

14. Assembly of gears
External gears

15. Assembly of internal gears

16. Engagement of pinion with rack

17. Engagement of bevel gears, axis inlet-section at any angle

18. Engagement of worm & wheel

19. Title Actual projection convention Slotted head Radial ribs
CONVENTIONAL REPRESENTATION OF COMMON FEATURES
Title
Actual projection
convention
Slotted head
Radial ribs
Serrated shaft

20. Title
Actual projection
convention
Ratchet &pinion
Bearing
Straight knurling

21. Title
Actual projection
convention
Diamond knurling
Repeated parts