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Cast Iron Three Phase Motors

Cast iron

For reliable performance in heavy duty industrial applications, nothing beats the Leeson Heavyweights.
With their cast iron construction and 1.15 Service Factor, they are ideal for “tough to handle” applications.

All Leeson Cast Iron frame motors include the following features:
• Heavy-Duty cast iron frame, endbells and conduit box.
• High torques for hard-to-start loads.
• 100% copper-wound Inverter Rated Insulation System is double dipped and baked. Stator press-fitted and pinned to housing.
• 1.15 Service Factor provides extra margin of power. Class F insulation system with Class B or lower temperature rise.
• Dynamically balanced rotor assembly is keyed to shaft.
• Cast iron endplates for maximum rigidity and long bearing life.
• Lubrication fittings on each end of motor (245T frame & larger). New Exxon POLYREX EM lubricant for extended bearing life. Oversized bearings. Slotted-head pipe plug reliefs. Bearing caps protect against entry of grease into the motor.
• Neoprene shaft slinger protects bearings by repelling moisture and other contaminents. Internal protection against rust and corrosion.
• One-way, corrosion resistant condensate drains (TEFC) release condensation and moisture.
• Internal caps on shaft-end and lead-end bearings 254T frame and larger.
• Cast iron mounting feet precision machined for accurate alignment.
• Oversized cast iron conduit box is gasketed and may be rotated in 90º increments. NPT threaded entrance.
• Steel fan cover for optimum strength. Cast iron cover available for severe service.
• Non-sparking fan. Small size reduces noise and enhances efficiency. Fan keyed to shaft.
• Stainless Steel “full fact” nameplate with information on motor efficiency and power factor. Includes wiring diagram, bearing sizes and motor weight.