ARC's complete line of A.C. Motor-Tachometer Generators are designed to meet the requirements of MIL-S-22432, SAE ARP-497 and MIL-S-22820B. These A.C. components range from size 8 (3/4" diameter) to size 23 (21/4" diameter). Designed to operate at 60 Hz. Or 400 Hz. And available in 2, 4, 6, 8, and 12 pole designs, our precision Motor generators can provide output signals from 0.1 volt to 3.1 volts per 1000 RPM. Custom units that operate at high temperatures are also available.