rolamite

noun

1. A simple machine consisting of a stressed metal band and counter-rotating rollers within an enclosure, used in low-friction bearings etc.

   “1969, National Heart Institute (U.S.), Artificial Heart Program Conference This unit is made up of a rotary torque motor, a rolamite to linear translation mechanism and a metal bellows as a fluid pump.”

   “Thus, many such things as virtually frictionless bearings, switches, valves, etc. can be constructed from rolamites.”