Ratchet hold.

Why does a ratchet turn in only one direction?

Setting up the mechanism…

Advance: 0.00°

Reverse load: Held

Fit the components, then test the mechanism.

Why does a ratchet turn in only one direction?

A sprung holding pawl climbs each shallow tooth in the forward direction and bears against the steep face under reverse load. It only holds within the stated illustrative torque rating.

advance = clicks × 30° · reverse load ≤ rating

What this model simplifies

Twelve-tooth holding ratchet, direct hand advance, illustrative torque rating. Not a structural safety calculation.

Read the source · khkgears.net ↗

Put it to work.

Advance three teeth and hold the reverse load.

Make it work.

Advance three teeth and hold the reverse load.

Run

Fine adjustments 2

Reverse torqueN·m

Pawl ratingN·m

Ratchet hold.

Why does a ratchet turn in only one direction?

Loading the experiment…

Figuvo

Understand by doing.

Understanding is something you do.

Figuvo is a place to look inside everyday things, build a connection, and discover the idea behind them.

177 interactive experiments. Each has a working model and a challenge to test what you found.

The original inspiration

Levers & fulcrums The surprising gyroscope The field cannon Inside the human body

Original demonstrations by The Bugged Dev. The teaching models and interactions here are new implementations.

Community builds

New teaching models inspired by public builds shared around Anatomy.

Anatomy · the original announcement How a rocket pushes through space · Gustavo Inside a tactile key switch · @retaqib Pressure through the coffee bed · Gustavo The overbalance wheel · Shawn A seconds pendulum clock · @Baconbrix Three feet on the ground · Soju Inside a layered particle detector · Yash A double-deck pressure cabin · Charlie Leave the spent booster behind · @quantapar Principal, interest and escrow · Sean Gear a Martian year · @samani_Two balls in, two balls out · @samani_Two slits, one probability pattern · @samani_Join through a clear plastic cover · Josh Brown Lay pipe without a sharp bend · @Phi10w Eight cylinders and a blower · @love4hxns Four columns under a Joglo roof · Nur Asyrof An office for dependent tasks · Yaroslav Yablonski One image, six editable layers · Meng To The Redis caching machine · @uviii_03 Inside the Sony CMD-J5 · Ann Afterburner thrust stand · Joshua Guo Open-back headphones · Surajan Shrestha Two-thread lockstitch machine · @slashui Signal factory · Dhruval Golakiya

Tools and workshop machines

Ratchet hold.

Why does a ratchet turn in only one direction?

Setting up the mechanism…

Advance: 0.00°

Reverse load: Held

Fit the components, then test the mechanism.

Why does a ratchet turn in only one direction?

A sprung holding pawl climbs each shallow tooth in the forward direction and bears against the steep face under reverse load. It only holds within the stated illustrative torque rating.

advance = clicks × 30° · reverse load ≤ rating

What this model simplifies

Twelve-tooth holding ratchet, direct hand advance, illustrative torque rating. Not a structural safety calculation.

Read the source · khkgears.net ↗

Put it to work.

Advance three teeth and hold the reverse load.

Make it work.

Advance three teeth and hold the reverse load.

Run

Fine adjustments 2

Reverse torqueN·m

Pawl ratingN·m