Synchron 640 AC Synchronous Motor – 15 RPM – 110V 60 Cycles – CLOSEOUT

Synchron AC Synchronous Motor – Series 640 – 15 RPM – 110V – New Vintage Stock

This original Synchron AC synchronous motor is a genuine piece of new vintage stock, marked Series 640 and rated for 110V operation at 60 cycles with a 15 RPM output. Designed to run in lockstep with AC line frequency, this motor provides stable, consistent rotation for timing-critical mechanical applications.

With a 15 RPM geared output and a 5-watt power rating, this motor is typically used to drive internal gearing, cam mechanisms, sequencing functions, or auxiliary motion within mechanical clocks and timing devices rather than serving as a final timekeeping shaft. The motor is permanently lubricated, intended for continuous duty, and built for quiet, long-term operation.

The markings include model code ZLI8LA-6 and date code 6-84, indicating June 1984 manufacture. This motor is no longer produced, and replacement units are increasingly difficult to source.

Product Details
Type: AC synchronous timing motor
Manufacturer: Synchron
Series: 640
Model / Marking: ZLI8LA-6 (It also may be ZL18LA-6) the code is hard to read
Date Code: 6-84
Output Speed: 15 RPM
Voltage: 110 VAC
Frequency: 60 cycles
Power Consumption: 5 watts
Duty Cycle: Continuous (24/7 rated)
Lubrication: Permanently lubricated
Condition: New vintage stock (unused)
Availability: Discontinued – limited remaining inventory

Features & Uses
Line-frequency locked operation for consistent, accurate rotation
15 RPM geared output suitable for cam, sequencing, strike, or auxiliary drive functions
Quiet, smooth operation designed for continuous use
Well suited for mechanical clocks, timers, and vintage timing devices
Authentic discontinued Synchron motor from preserved vintage inventory