Pegas puntir

Pegas puntir atau bandul puntir () adalah sebuah pegas yang bekerja dengan memuntir ujung di sepanjang porosnya. Dengan kata lain, ia adalah alat elastis fleksibel yang menyimpan energi mekanis saat alat tersebut dipuntir.

Daftar pustaka
 .  Detailed account of Coulomb's experiment.
 .  Shows pictures of the Coulomb torsion balance, and describes Coulomb's contributions to torsion technology.
 .  Describes the Nichols radiometer.
 .  Description of how torsion balances were used in petroleum prospecting, with pictures of a 1902 instrument.

Pranala luar

Torsion balance interactive java tutorial
Torsion spring calculator
Big G measurement, description of 1999 Cavendish experiment at Univ. of Washington, showing torsion balance[link broken]
How torsion balances were used in petroleum prospecting (web archive link)
Mechanics of torsion springs. Web archive link, accessed December 8, 2016.
Solved mechanics problems involving springs (springs in series and in parallel)

Pendulum