The Maxon RE8 permanent magnet dc motor is only 16mm long by 8mm in
diameter and weighs a mere 4g, yet it is capable of delivering a nominal
power output of 0.5W. The motor features a ceramic shaft, precious metal
brushes, an ironless rotor and neodymium magnet. In combination, these
confer low inertia, high acceleration and energy efficiency to any
application requiring a tiny drive. The RE8 can be used in conjunction
with Maxon's planetary gearheads, and also fitted with an encoder, if
required. Maxon says the integral Hall effect sensor should be sufficient
for most speed and position sensing requirements. Typical applications
include light chopping in laser-based equipment, and pump drivers in
sub-miniature drug delivery systems.