Recent Blogs
Watch-winding Stop (form 3) Mechanism: How It Works, Parts, Diagram, and Turn-Count Formula
Watch-winding stop form 3 explained — how this ratchet-and-pawl limit prevents mainspring overwinding in horology, with formulas, tolerances, and a worked example.
Harrison's Going-barrel Mechanism: How It Works, Parts, Diagram, and Uses Explained
Harrison's going-barrel keeps a clock running while you wind it. Learn how the maintaining-power click works, with worked torque math for restorers and clockmakers.
Harrison Winding Device Mechanism: How It Works, Diagram, Parts, Formula and Uses Explained
Harrison's maintaining power winding device keeps a precision clock running while you wind it. Used in marine chronometers and longcase regulators since 1722.
Fusee Chain and Spring Drum Mechanism: How It Works, Parts, Formula, and Diagram Explained
Fusee Chain and Spring Drum explained — how horologists use a tapered cone and chain to equalise mainspring torque across an 8-day run. Diagram, formulas,...
Fusee (form) Mechanism: How It Works, Parts, Diagram, and Uses in Watches and Chronometers
How a Fusee equalises mainspring torque in pocket watches and marine chronometers — geometry, formula, worked example, and selection guide for restorers.
Mainspring Mechanism Explained: How It Works, Parts, Torque Formula & Barrel Diagram
How a mainspring stores and releases energy in watches, clocks, and timing mechanisms — torque curves, barrel sizing, and real-world tolerance rules.
Barrel (horology) Explained: Mechanism, Parts, Diagram, and Mainspring Power Reserve
How a watch barrel stores mainspring energy, drives the gear train, and sets power reserve. Real numbers, design tradeoffs, and worked example for watchmakers.