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Bevel Gear
A pair of toothed rotating gears that transfer power between intersecting shafts, usually at a 90° angle.
Gear
A toothed wheel that meshes with another to transmit motion or change speed/direction.
Rack & Pinion
A mechanical system where a toothed bar (rack) engages with a circular gear (pinion) to convert rotary motion into linear motion.
Ratchet and Pawl
A mechanical device that allows motion in one direction only. The pawl fits into the teeth of the ratchet wheel, preventing backward rotation while allowing forward movement.
Spur Gear
A toothed gear with teeth that project parallel to the gear’s axis, used to transmit motion between parallel shafts.