SS402B Danaher
Wake Industrial LLC is not an authorized distributor of this product.
The Danaher SS402B is part of the Slo-Syn Synchronous Motors series and has a NEMA 42 frame size. It operates at 240 VAC single phase with a line current of 0.40 A and a minimum run torque of 2.82 N·m. The motor supports speeds of 60 RPM at 50 Hz and 72 RPM at 60 Hz and weighs 5.6 kg.
Internal Product Review
The SS402B is a Danaher Slo-Syn synchronous motor designed for steady low-speed drive applications with single-phase operation at 240 VAC. NEMA 42 frame sizing and 2.82 N·m minimum run torque give this unit an excellent balance of installation practicality and usable output. With 72 RPM at 60 Hz, this motor stands out as a dependable choice for controlled motion.
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Product Description:
The SS402B synchronous AC stepping motor is manufactured by Danaher as part of the Slo-Syn Synchronous Motors series. The device is a single-phase, low-speed motor that synchronizes its shaft motion with the supply waveform, producing predictable angular movement without closed-loop electronics. In assembly lines, labeling stations, or metering pumps, it supplies direct, line-referenced motion so PLCs can synchronize feeding or dosing cycles by energizing or de-energizing the stator. This operating method provides repeatable motion for equipment that runs at a speed tied directly to the supply frequency.
Rated for 240 VAC on the supply line, the motor draws 0.40 A during steady operation, limiting panel fuse size and heat rise. Shaft speed is fixed at 60 rpm with a 50 Hz source and 72 rpm at 60 Hz, providing two discrete output rates tied directly to the grid frequency. A minimum running torque of 2.82 N·m maintains rotation under start-stop loading. Phase shift is established with 2.5 µF and 1.75 µF capacitors for 50 Hz and 60 Hz, respectively. A 500 Ω, 50 W resistor dissipates dynamic energy during rapid deceleration. The single-phase design simplifies wiring and permits integration wherever neutral and line connections are available.
The housing conforms to the NEMA 42 frame standard, providing a 4.188-inch square face and a generous pilot for aligning heavy tooling. The rotor and bearing components tolerate load inertias up to 14.6 kg·cm² at 50 Hz or 13.2 kg·cm² at 60 Hz, allowing moderate flywheels to be coupled without creating resonance issues. The shaft can accept an axial force of 222 N and a radial force of 111 N when the motor is installed in any orientation. These load capacities support applications that place both thrust and side forces on the output shaft. The installation weight is 5.6 kg, which eases manual handling and reduces overhung mass on linear slides. The frame proportions provide sufficient mounting area for secure attachment to machinery while maintaining alignment with the connected load.
