- Improved ferrite motors are twin ball raced, and have external brush gear which will carry much heavier loads than can-type motors. The brushes are usually larger carbon blocks, with pigtails linking them to the power connection. The springs applying pressure to the brushes, ensuring good contact with the commutator, and are independent of the brushes themselves, whereas in can-type motors the current usually is carried by the springs. If the springs in can-type motors get hot, they lose their tension and fail to apply good pressure to the brushes. In the Leisure improved ferrite motors featured here, the springs are independent, the pigtails are heavy duty, the brushes are good quality, and the brush holder itself is plated to improve the current carrying ability. Leisure motors are capable of taking loads of 50A for short periods of operation, whereas can motors are limited to about 30A. Pushing improved ferrite motors to this level of amps is an economical way of obtaining high performance for low cost, but I must warn you that there this comes at a price. Ferrite motors operating at high amps need regular servicing to maintain performance. The armature must be removed from time to time and the commutator needs to be skimmed in a lathe. You must also clean the commutator, removing any carbon build up.
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- All this means that these Leisure motors are good quality motors at a reasonable price. They come ready for use, with correct timing for operation at full load, and with three radio-interference suppressor capacitors already fitted. They fit straight into most gearboxes, including the Leisure gearboxes featured on this site (and motors intended for gearboxes already have the timing reversed).
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- Leisure motors with timing for forward rotation (as required for planetary gearboxes like the MP-Jet variety), are also available ex-stock.
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