Precision machined aluminum gear housing. Worm-type right-angle gearing features hardened, steel worm with bronze worm wheel for long life and quiet operation. Lubrication is permanent with an oil bath. Gearbox has all ball bearings. Output shaft is field interchangeable from left hand to right hand style by reassembly. Double output shaft available as a factory option. Performance matched for continuous duty service over 60:1 speed range. These right-angle gearmotors have a lubrication breather positioned for horizontal mounting. For other mountings, the breather plug must be reoriented by using a 90 degree 1/8 inch NPT taper pipe elbow. Constant torque throughout the range when powered by a full-wave unfiltered SCR-type adjustable speed control having a typical form factor of 1.3 to 1.4. - Leeson SCR Rated DC Gear Motor, Armature Voltage: 90V, Bearing Type: Ball, Dimensions: 8.79 Inch L x 3.73 Inch H, Duty: Continuous, Enclosure Type: Totally Enclosed Non-Ventilated, Frame Size: 25, Gearing Arrangement: Worm Gear, HP Rating: 0.058 HP, Insulation Type: Class H3, Material: Steel, Over-Hung Load: 185 lb, Overload Protector: No, Rotation: Reconnect, Service Factor: 1, Shaft Diameter: 0.5 Inch, Shaft Length: 1.3 Inch, Shaft Position: Right-Angle, Temperature Rating: 40 °C.