National Motor Mfg. Co manufactures Flange Mounting Hollow Shaft Motor. National Motor Mfg. Co manufactures single phase and three phase special purpose motors. The Flange Mounting Hollow Shaft Motor has right angle Heli-Worm reduction gear motor design that is recommended to satisfy customer requirement of higher reduction ratios in a compacter assembly. Heli-worm Gear Flange Mounting Hollow Shaft Motors are available in Hollow Output Shaft & Solid Output Shaft designs, both with foot mounting and flange mounting considerations. These are available in 2-1/8 inch center, 3-inch center, 3-1/2 inch and 5 inch center designs. Ratios range from 73:1 up to 200:1 in single casting models. Ratios up to 3600:1 can also be achieved using combination gear boxes. Output torque of Flange Mounting Hollow Shaft Motor ranges from 175 N.Mt. Up to 1450 N.Mt. Motors from 0.16 HP/0.13 KW up to 2.0 HP. Can be used with existing models.
Speed reduction for higher ratios is achieved in two stages of reduction. First stage reduction is achieved using helical gears and second stage comprises of a worm shaft and a worm wheel assembly. Helical gears and worm shafts are manufactured from case hardening alloy steel. The worm wheel is centrifugally cast using a phosphor bronze alloy and securely mounted on an iron hub. The helical gears are lapped and the worm shafts are profile ground to ensure minimum backlash, noise, low heat and efficient power transmission. The entire gear assembly of Flange Mounting Hollow Shaft Motor runs in an oil bath, ensuring splash lubrication to all bearings situated in the gear casing. Proper oil level should be maintained using level indicators and oil plugs provided.
