Rotating or translating shaft used in Z-axis motion.

Ring securing a shaft or setting shaft position.

Support maintaining vertical component spacing.

Thin material used to adjust Z-axis alignment.

Component providing controlled Z-axis spacing.

Hardware securing a Z-axis component.

Linear-guide carriage used for Z-axis movement.

Moving element traveling along a guide rail.

Rail supporting linear Z-axis motion.

Precision guide for Z-axis travel.