Njengama-cylinders we-hydraulic, okuthile okuphoqa i-piston ukuhambisa endaweni oyifunayo. I-piston iyi-disc noma isilinda, futhi induku yepiston idlulisela amandla akhulisa entweni ezohanjiswa. [1] : Enjiniyela abangama-85 kwesinye isikhathi bakhetha ukusebenzisa ama-pneumatics ngoba bathule, bahlanzekile, futhi abadingi isikhala esikhulu sesitoreji se-fluid.
Ngoba uketshezi olusebenzayo luyigesi, ukuvuza kusuka kusilinda se-pneumatic ngeke kukhiphe futhi kungcolise indawo ezungezile, okwenza ama-pneumatics afiseleka ngokwengeziwe lapho ukuhlanzeka khona kuyisidingo. Isibonelo, kumaPuppets mehendi e-Disney Tiki Igumbi, ama-pneumatics asetshenziselwa ukuvikela uketshezi ukuthi ahlanze abantu ngezansi kwemidlwane.