SS451 Danaher
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The Danaher SS451 is a synchronous motor from the Slo-Syn Synchronous Motors series, weighing 6.5 pounds and offering a minimum torque of 450 oz-in. It operates as a single-phase motor at a rated voltage of 120 Vac and a frequency of 60 Hz. The motor supports an axial shaft load of 50 lb and a radial shaft load of 25 lb, with a synchronous speed of 72 RPM.
Internal Product Review
The SS451 is a Danaher Slo-Syn synchronous motor offering a robust minimum torque of 450 oz-in and operates reliably at 120 Vac with a 0.8 A line current. This 1-phase motor features a 72 RPM synchronous speed and is equipped with a 14 μF phase capacitor for stable performance. With solid axial and radial load ratings, the SS451 stands out for consistent, heavy-duty operation in demanding environments.
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Product Description:
The SS451 is a constant-speed synchronous motor produced by Danaher for the Slo-Syn Synchronous Motors series. This AC machine locks its rotor magnetism directly to the incoming mains cycle, so it delivers defined motion without encoder feedback. In material-handling lines, feed mechanisms, and light process equipment the unit supplies steady shaft power and maintains positional accuracy whenever a fixed 60 Hz source is present, simplifying drive electronics in small-to-medium automation assemblies.
During normal service the motor accepts a single-phase supply and draws 0.8 A RMS while operating on 120 Vac at 60 Hz. These electrical requirements align with standard North American control panels, and Wiring Diagram C identifies the correct lead configuration for connection. Once energised, the rotor develops a minimum holding torque of 450 oz-in (3.18 Nm), enabling direct drive of medium inertial loads without external gearing. Mechanical fit is guided by the 2.875 in pilot on the faceplate and by a 0.3750 in shaft diameter that mates with keyed couplings or pulleys. The phase arrangement is 1-phase, and the windings reference a capacitor that shapes current for optimal power factor.
When powered through a 14 µF (250 Vac) phase-shifting capacitor the stator field forces the rotor to the synchronous rate of 72 RPM. Bearing design permits an axial thrust up to 50 lb (222 N) and a radial side load of 25 lb (111 N), so the device can carry moderate belt tension or end-thrust from screw drives. Overall mass is 6.5 lb (2.9 kg), light enough for bench-top rigs yet substantial enough to damp resonance. The specified shaft diameter supports couplings with close-fit hubs, and the pilot registers the frame concentric to housings, ensuring repeatable alignment across replacement cycles.
