FHP Motor for Machine Tool Applications.--A new totally enclosed fractional horsepower motor, especially designed for use on machine tools, has been announced by the General Electric Company's General Purpose Component Motor Department. The new heavy duty motor is factory lubricated for ten years' service under normal machine tool conditions. Such lubrication is made possible by a special motor grease, which is highly resistant to oxidation and moisture , they said.
Ideally suited to plugging service and dirty atmospheres, the motor is totally enclosed and fan cooled. The welded-on steel base and ball bearing design help protect the motor against shock and vibration, and maintain accurate motor alignment.
Built to meet the demands for frequent start-stop service, the motor has normal torque for starting, high pull-up torque for inertia loads, and high breakdown torque for peak loads, the engineers said. Insulation materials of Mylar* polyester film, Formex ** wire, and Glyptal** varnish assure resistance to heat, aging, moisture, and electrical stresses.
In horsepower ratings of ΒΌ, ~, Β½, and ~, the polyphase TEFC motor is available with speeds of 1725/1425 and 1140/950 rpm. at 60/50 cycles, and in voltages of 208--220/440, 220/380, and 550.