SS241CT Danaher
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The Danaher SS241CT is a synchronous motor from the Slo-Syn Synchronous Motors series, featuring a NEMA 34 frame size and operates at 120 Vac, 60 Hz, single phase with a line current of 0.4 A. It provides a minimum run torque of 240 oz-in, has a run speed of 72 RPM, and supports axial shaft loads up to 50 lb and radial shaft loads up to 25 lb. The motor has an overall length of 5.48 inches with a 0.375 inch shaft diameter and a mounting bolt circle of 3.875 inches.
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Product Description:
The SS241CT is a single-phase synchronous stepping motor manufactured by Danaher for the Slo-Syn Synchronous Motors series. Built for fixed-speed or incremental motion, it locks its rotor to the sinusoidal power waveform and supplies constant rotational output without an electronic drive. This operating characteristic makes the unit practical for timing feeders, labeling stations, and other devices where direct line operation simplifies wiring while providing repeatable positioning.
The stator is wound for 60 Hz utility power, and the five-tooth rotor design produces a synchronous speed of 72 rpm. When energized from a single-phase source of 120 VAC, the motor draws only 0.4 A, so modest branch-circuit protection is adequate. Its minimum continuous torque is 240 oz-in, providing reserve capacity to overcome friction in gearboxes or lead screws during steady-state operation. The mounting face has 0.223-inch clearance holes and a 2.875-inch pilot for concentric alignment with connected equipment. Its overall length is 5.48 inches, allowing installation in shallow cabinets and other confined machine spaces. Power enters through a 0.50-14 NPT threaded hub that accepts standard liquid-tight fittings and protects the single run capacitor used for phase splitting.
The rotor can withstand up to 50 lb of axial load and 25 lb of radial load, allowing the bearings to support moderate belt tension or thrust-collar forces. The square housing follows the NEMA 34 footprint, while the output shaft measures 0.3750 in in diameter and has a usable flat length of 1.00 inch for set-screw couplings. Four clearance holes are positioned on a 3.875 in bolt circle to accommodate compatible gearheads and mounting plates. The single-phase electrical arrangement reduces wiring complexity because it does not require the phase sequencing associated with three-phase motors. The shaft flat provides a secure contact surface for coupling set screws, helping prevent slippage under normal torque loads. The pilot centers the motor on the mating surface before the mounting hardware is tightened, which helps maintain shaft alignment with the driven mechanism.
