Product Description:

The SR3624-8291-7-56BC-CU-250210 is a permanent-magnet direct-current motor produced by Pacific Scientific within the Permanent Magnet DC Motors series. The unit converts 90-volt DC electrical input into controlled rotary motion for tasks such as conveyor drives and positioning tables in industrial automation. By supplying continuous torque at low speed and allowing straightforward armature voltage control, the motor provides a simple means of regulating mechanical output without the complexity of variable-frequency inverters.

The armature can deliver a continuous current of 2.7 A, allowing the windings to produce a steady torque output of 9.0 lb-in during normal loading. A rated supply of 90 VDC establishes the motor’s operating point, and modulating this voltage is the primary method of speed control up to the base velocity of 1750 RPM. The electromagnetic conversion is characterized by a torque constant of 3.9 lb-in/A, meaning nearly four pound-inches are produced for every ampere that reaches the armature. Dynamic response is influenced by a 9.6 mH inductance, while a 2.5 Ω resistance limits inrush and contributes to thermal rise. The frame follows NEMA 56C geometry, providing a standard foot-flange pattern that mates directly with reducers or pump heads.

For short acceleration bursts, the motor can draw a peak armature current of 54.0 A, giving the shaft ample reserve above the continuous limit. The motor has an output rating of 1/4 HP, and it remains within the thermal envelope of the totally enclosed non-ventilated housing designated TENV. Installation space is set by a 9.13 in overall length, a 0.6250 in shaft diameter secured with a 0.188 × 1.38 in key, and a 4.500 in pilot that centers the motor on the mating flange. The assembly weighs 18 lbs, which adds enough mass for stable mounting without making the unit unnecessarily bulky.