SS400B Danaher
Wake Industrial LLC is not an authorized distributor of this product.
The Danaher SS400B is part of the Slo-Syn Synchronous Motors series and operates at a rated voltage of 120 Vac with a synchronous speed of 72 RPM. This motor has a minimum running torque of 400 oz-in, weighs 12.3 pounds, and supports an axial shaft load of 50 pounds. It uses a single phase, draws a line current of 0.6 A, and features a rated frequency of 60 Hz.
Internal Product Review
The SS400B is a Danaher Slo-Syn synchronous motor with 400 oz-in minimum running torque and 72 RPM synchronous speed. Single-phase 120 Vac operation supports straightforward integration in standard industrial power schemes. For indexing and positioning duties, the SS400B stands out as a dependable choice for steady low-speed torque.
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Product Description:
The SS400B is a single-phase synchronous stepping motor built by Danaher as part of the Slo-Syn Synchronous Motors series. Used in industrial automation, the motor indexes loads to discrete positions by running at a fixed synchronous speed when energized from a standard 120-volt supply. By integrating the rotor magnetics with a simple phase-shift network, the unit provides constant-speed rotation without external feedback. Because of this characteristic, the SS400B is often selected for conveyor indexing, metering pumps, and material feed drives that need predictable low-speed motion.
Electrical operation centers on a single-phase winding that draws 0.6 A from a 120 VAC line while the companion phase-shift network maintains the required quadrature relationship. The network consists of a 6.5 µF capacitor and a 150-ohm, 50 W resistor, producing the torque phasor needed to lock the rotor at the synchronous angle. Under these conditions, the shaft turns at 72 rpm, a speed derived directly from the supply frequency of 60 Hz and the motor’s eight-pole construction. Minimum running torque reaches 400 oz-in, allowing the motor to accelerate moderate inertial loads without stalling.
The motor’s mechanical load limits correspond to its electrical capabilities and intended operating range. The shaft accepts an axial load of 50 lb and a radial load of 25 lb before bearing life may be reduced. Permissible reflected inertia is limited to 0.18 oz-in-s² to keep phase slip within the intended operating margin. The housing measures 6.62 inches in overall length and has a 2.186-inch pilot with a 3.000-inch mounting-bolt circle, simplifying attachment to gearheads or mounting brackets. The motor has a total mass of 12.3 lb, allowing standard elastomer mounts to provide vibration isolation when required.
