· Gear materials: Plastic or metal.
· Motor types: Wound-field, permanent-magnet, brushless, intermittent and continuous duty motors.
· Brush-type and brushless motors: The brushed motor gains torque from the power supplied to the motor using stationary magnets, commutation and rotating electrical magnets. Brushless motors use a soft magnetic core in the rotor or a permanent magnet, as well as stationary magnets in the housing.
· Uncommutated motors: Homopolar motors or ball bearing motors.
· Connection types: Shunt, series and compound connections.
· Motor constants: Kv and Km.
· Speed control and reversibility: Smoothly control a speed down to zero without power circuit switching, even after accelerating in the opposite direction.
· Dynamic braking and regenerative braking: Ideal for applications that require quick stops so you don’t need a mechanical brake.
· Magnet types: Rare earth, ceramic or ferrite magnets.
· Winding resistance: Choose a motor that doesn’t adversely affect the Km.
· Gear ratios: Several varieties available, such as 28:1 or 18:1.
· Environment: Motors are available for indoor or outdoor use.
· Torque multiplication: Generate a large force at a low speed.
· Custom-built: You can have a DC gear motor designed and manufactured to suit your size, power, torque and mounting needs.