Recent Blogs
Electro Magnetic Ratchet Driver
Electromagnetic ratchet drivers convert solenoid pulses into stepwise rotation. Learn how they work, sizing math, and where industry uses them — with a worked example.
Tappet Stud and Ratchet for Revolution Counter
How a tappet stud and ratchet revolution counter works — the once-per-rev pin advances a count wheel one tooth, used on machine tools, meters, and...
Reciprocating to Intermittent Circular via Pawl
How a reciprocating pawl converts back-and-forth motion into one-way intermittent rotation — design rules, formulas, and worked examples for counters and indexers.
Ratchet-wheel Stops
Ratchet-wheel stops lock rotation in one direction for hoists, winches, and indexers. See how the pawl geometry, tooth pitch, and holding load all interact.
Otis Safety-stop for Hoisting Platform
How the Otis safety-stop works on hoisting platforms — pawl-and-ratchet geometry, rope-tension trigger, and named elevator applications from 1853 to today.
Crown-ratchet (rag-wheel)
How a crown-ratchet (rag wheel) delivers one-way intermittent motion in clocks, capstans, and counters — geometry, sizing math, and a worked design example.
Skip Jack
Skip Jack mechanism explained — how the ratchet-and-pawl lifting jack works, where road crews use it, formulas, worked example, and failure modes.
Ratchet Governor
Ratchet governor explained — how the pawl-and-wheel speed limiter prevents overspeed in winches, hoists, elevators, and industrial drum brakes.
Ratchet Lift
Ratchet Lift mechanism explained — how the pawl-and-toothed-bar system holds load in stage rigging, jacks, and scissor lifts without backdrive.