The GMS2768 Series is a compact 12 VDC spur gear motor designed for low-speed mechanisms that require geared torque output, electronic speed control, and feedback integration in a limited installation space. The supplied engineering drawing identifies reference model GMS6728MBL3025D012-73K, while the product-family parameter sheet lists a 1:73 reduction ratio, 12 V operating voltage, 35-55 RPM rated-speed reference, up to 12 kgf·cm rated torque, and up to 50 kgf·cm locked-rotor torque. The drawing also provides a five-wire VCC / GND / PWM / FG / FR interface, supporting speed-command, feedback, and direction-related system integration. This configuration can be evaluated for smart appliances, vending and dispensing mechanisms, industrial automation modules, access-control devices, and other OEM drive systems requiring compact low-speed output and electronic control.

Gearbox Technical Data

Motor / Control Interface Technical Data

The engineering drawing shows a five-wire electronic interface rather than a simple two-wire brushed-motor connection. The listed functions are VCC, GND, PWM, FG, and FR. This enables the customer control system to integrate power, speed command, speed feedback, and direction-related control according to the final electrical specification.

The supplied GMS2768 drawing shows an overall height reference of 67.4 mm, a 39.4 mm maximum width on the front view, and a motor diameter reference of Ø34.55 mm. Additional drawing dimensions include 50.95 mm along the lower horizontal reference and multiple gearbox/mounting offsets. Because several dimensions are installation-specific, the original engineering drawing should be used for final CAD interface confirmation.

Engineering Value for Product Development

Compact low-speed spur-gear drive with electronic control

The GMS2768 combines a compact spur-gear transmission with an electronically controlled DC motor interface, making it suitable for OEM mechanisms that require low-speed geared output plus control-system integration.

1:73 reference ratio for torque-focused low-speed mechanisms

The supplied reference ratio is 1:73. Ratio selection should balance target output speed, torque demand, current, noise, cycle time, and gearbox durability in the actual mechanism.

PWM and FG interface supports closed-loop system integration

The drawing identifies PWM and FG signal lines together with VCC, GND, and FR. This allows the customer controller to coordinate command input, feedback monitoring, and direction-related logic subject to the final electrical definition.

High torque references require duty-cycle validation

The family sheet lists up to 12 kgf·cm rated torque and 50 kgf·cm locked-rotor torque. Locked-rotor torque should be treated as an abnormal-condition reference, not a continuous operating point. Current limiting, timeout logic, or mechanical protection should be used where jamming is possible.

Customizable motor and gearbox parameters

The supplied family material states that gearbox and motor parameters can be customized. Final voltage, ratio, speed, control interface, mounting, and load targets should be confirmed from the customer application before sample build.