DC Traction motors series 3M
Drive motors of 3M series are designed for drives of small road and railway vehicles, fork lift and platform trucks and further for auxiliary drives of servomechanisms, hydro mechanisms, fans, air compressors, etc.
Motors are manufactured of axial heights:
The frame consists of a steel tube providing sufficient mechanical rigidity with welded feet. In the case of bigger and highly loaded machines the flange or even commutator shield are made of refined cast iron, in other cases from cast iron. Motor machine design allows to supply traffic of the motors with different nominal speed preserving chosen driving voltage.
Motors can be powered from converters, connected to accumulator batteries or to direct-current mains at voltage from 12 to 120 V, according to size of the motor.
Rotors are dynamically balanced with half-key. Free shaft end is cylindrical with key, on demand it can also be smooth tapered, with screw, differently shaped, optionally even with gear or with serration. The second shaft end is also possible.
Ball bearings are with permanent fat filling, on demand the bearings can be also with an increased radial clearance C3 or with lubrication with a higher temperature resistance (for operating temperature of the bearings 80°C and higher).