The spindle has a diameter of 4 mm and may be smooth, milled or grooved;
Long-life versions available (ball-bearings);
Twin-speed versions available;
Thermal protection based on impedance by the motor itself, or by thermostat or fuse
Power-supply voltage: from 12 VAC to 240 VAC/1/50-60Hz
Insulation class F or H
VDE and UL approvals upon request