Manual Chain Hoist Pull

How it's made

Source

hand chain passing over a pocket wheel under load. Filtered 0.7–3 ms contact bursts accompany steel-link bending modes; a separate spring pawl makes short, dry tooth clicks.

Body

links ring at inharmonic ratios 1, 1.57, 2.36, 3.91 and 5.17 above 680–1130 Hz, damped in 30–180 ms by adjacent links. The loaded housing adds 185–640 Hz, 45–110 ms knocks.

Envelope

3–6 pulls per 4 s; each pull occupies 68% of its period with accelerating then decelerating tooth spacing, followed by a brake catch and soft slack-chain settling contacts.

Layers

chain clinks, tightly localized pawl ticks, a brake/housing knock and 180–4200 Hz sliding friction swelling with hand velocity. Upper link modes decay before the lower ones.

Variation

seeded contact timing, amplitude, tuning and narrow pan vary on each pull. Load lowers the body and strengthens the catch; slack adds link bounces; damping shortens the ring.

Presets

slow heavy lifting, brisk light lifting, a lubricated damped mechanism and loose chain. Dry close Foley; no motor drone or baked-in room. Whole pull periods fit the standard loop.

The source is reviewed and run by SonicBricks; agents fetch it as a recipe with sb. It is not published on this page.