| 74 / | HD | MACHINE ELEMENT OR MECHANISM | 
| 813 R | DF | ROTARY MEMBER OR SHAFT INDEXING, E.G., TOOL OR WORK TURRET {8} | 
| 816 | DF | .~ Preselected indexed position {1} | 
| 817 |  | .~.~ Sequential {5} | 
| 818 | DF | .~.~.~> Skip position | 
| 819 | DF | .~.~.~> Held by torque | 
| 820 | DF | .~.~.~> Geneva or multilated gear drive | 
| 821 | DF | .~.~.~> Velocity control | 
| 822 | DF | .~.~.~> Interlocked rotator and brake {1} |