Product Description:

The SS241LE is a synchronous AC motor produced by Danaher as part of the Slo-Syn Synchronous Motors series. Designed for open-loop stepping or constant-speed duties in industrial automation, the unit converts 60 Hz power into precise shaft rotation that can directly index conveyors, feed mechanisms, or metering pumps without external feedback. Its single-phase stator is wound for residential and light-industrial utility service, and the double-ended shaft simplifies coupling to encoders or secondary loads.

The electrical section is rated for 120 VAC at the terminals, and a rated speed of 72 rpm corresponds to the internal pole count when the motor is driven from a 60 Hz source through a phase-shift network. Steady-state line draw is limited to 0.4 A, so the motor can be powered from standard control transformers or branch circuits without special breakers. Minimum running torque reaches 240 oz-in, allowing the rotor to overcome friction and modest process disturbances while maintaining synchronous velocity. A polypropylene phase-shift capacitor rated at 7 µF must be wired in series with the auxiliary winding. This component advances the current phase, creating the rotating field needed for single-phase operation. The NEMA size 34 frame, leaded connection style, and minimum lead length of 12 inches simplify installation inside small panels or directly on machine plates.

The motor supports an axial thrust of up to 50 lb and a load inertia not exceeding 0.10 lb-in², so gearing or couplings should be selected to remain within these limits and avoid pullout. Its overall stack depth is 2.72 in, keeping the motor compact in tight assemblies. The cast housing weighs 4.1 lb, which minimizes overhung mass on support structures. A maximum radial load of 25 lb protects the bearings during operation with belt drives. The double-ended shaft also allows a damper to be mounted on the free end to further stabilize single-step transients.