Servo Tek SB-757B-1 DC Tachometer Generator Unit

SB-757B-1 is a Servo-Tek DC tachometer generator from the B-Series, designed to convert shaft speed into a proportional DC voltage for remote indication and speed feedback in DC servo systems. The unit is offered in an industrial configuration with a 0.187-inch shaft diameter and a mounting flange, weighing about 4 ounces. It provides an output of 11–24 V per 1,000 RPM and is rated for a maximum shaft speed of 8,000 RPM, with a dynamic armature resistance around 1 kΩ, making it suitable for pulley and belt-drive applications in instrumentation and control loops. This model is documented alongside related Servo-Tek tachogenerators such as SU-7346B-1 and other SB/SA variants in the manufacturer’s literature and catalog references.