Product Description:

The SR3640-1034-84-7-56HC is a permanent-magnet DC motor manufactured by Kollmorgen for the SR and SRF Permanent Magnet Motors series. In industrial automation, it delivers controlled rotary motion wherever a low-maintenance brush-type drive is required, such as indexing tables, light conveyors, or auxiliary pump stages. Its direct-current architecture simplifies speed regulation through basic thyristor or pulse-width modulation drives, allowing precise velocity control without the complexity of closed-loop AC systems. The commutator assembly and enclosed construction make the unit suitable for installation in locations where airflow is limited.

At its nominal electrical operating point, the motor accepts 180 VDC and draws 2.6 A. This input produces a shaft output of 0.5 HP at a rated speed of 1750 rpm under load. Because it uses a PMDC design, no separate field supply is needed. Motor speed varies almost linearly with the applied armature voltage, providing predictable control with simple drive topologies. The modest armature current allows the use of smaller conductors and helps limit heat buildup in densely packed panels.

The output shaft rides on a set of sealed ball bearings, helping prevent lubricant loss and particulate contamination during horizontal or vertical mounting. Magnetic flux is supplied by Alnico magnets, which provide stable torque across a wide ambient temperature range and resist demagnetization. The windings use Class H insulation materials with a maximum temperature of 180 °C, allowing the motor to tolerate elevated enclosure temperatures before derating is necessary. The face-mount pattern follows the 56C NEMA frame code, enabling direct attachment to compatible C-face reducers, pumps, and clutches without custom adapters. This mounting arrangement also supports accurate shaft alignment and provides a rigid connection between the motor and the driven equipment during repetitive operating cycles.