Product Description:

Pacific Scientific's SR3640-8293-7-56HC belongs to the Permanent Magnet DC Motors series and is intended for fixed-speed industrial duties where direct-current power is available. By combining a laminated steel stack with surface-mounted magnets, the unit supplies consistent shaft output for material-handling, packaging, and light process equipment that benefit from simple speed regulation through armature voltage. Its permanent-magnet design supports straightforward control in machines that need steady rotation rather than complex servo behavior. That makes it a practical choice for conveyors, feeders, and similar mechanisms that rely on dependable rotational output over long production runs. It is also well suited to auxiliary drives that must start reliably from a DC supply without elaborate control electronics.

The armature can carry 5.1 A continuously, and that current level supports a stall capacity of 18 lb-in. Electrical response is influenced by the winding inductance of 4.38 mH, while the 0.95 Ω resistance contributes to inrush current and steady-state copper losses. Dynamic events are handled through a peak armature draw of 67 A, giving short-term current headroom during acceleration. Mechanical output is rated at 1/2 HP, and the 4.05 lb-in/A torque constant relates armature current to shaft torque. Thermal management is aided by a totally enclosed non-ventilated frame, which helps limit the entry of debris and supports use in enclosed machine layouts.

When operated at 1750 RPM from a nominal bus of 90 VDC, the motor's sealed housing meets IP65, enabling use where airborne moisture or dust is present. Field maintenance is limited to scheduled brush changes with kit YP00572, and the service points are accessible without dismantling the endbells. A shipping weight of 26 lb allows manageable handling during installation and mounting. This arrangement suits washdown-prone areas and dusty production zones where an open-frame motor would need additional shielding. Brush access also shortens routine service and helps keep downtime predictable during scheduled maintenance. The sealed enclosure helps protect internal components from contamination during routine operation.