Smart Lock Motor GM2140FD
The GM2140FD-0001 Smart Lock Motor is a 12 VDC micro DC gear motor designed for electronic lock and access-control mechanisms requiring low-speed, high-torque actuation in a slim housing. The engineering drawing specifies a 1:169.2 gear ratio, 77±10% RPM no-load speed, 60±10% RPM rated speed, >4.0 kgf·cm rated torque, and >16 kgf·cm stall torque. Its 6.6–14 VDC working range, CW/CCW rotation, external 18-tooth module-1.0 output gear, and compact 110.5 mm-class body support integration into smart door locks, cabinet locks, and customized locking mechanisms. Final selection should be validated against latch load, duty cycle, supply voltage, stall-protection strategy, and mounting interface.
Product Overview
The GM2140FD-0001 Smart Lock Motor is a 12 VDC micro DC gear motor designed for electronic lock and access-control mechanisms requiring low-speed, high-torque actuation in a slim housing. The engineering drawing specifies a 1:169.2 gear ratio, 77±10% RPM no-load speed, 60±10% RPM rated speed, >4.0 kgf·cm rated torque, and >16 kgf·cm stall torque. Its 6.6–14 VDC working range, CW/CCW rotation, external 18-tooth module-1.0 output gear, and compact 110.5 mm-class body support integration into smart door locks, cabinet locks, and customized locking mechanisms. Final selection should be validated against latch load, duty cycle, supply voltage, stall-protection strategy, and mounting interface.
Model Information
| Model | Motor Type | Product Category |
| GM2140FD-0001 | DC Brushed Gearmotor | Smart Lock / Electronic Lock Motor |
Main Parameters
| Rated Voltage | 12 VDC |
| Working Voltage | 6.6–14 VDC |
| Gear Ratio | 1:169.2 (engineering drawing) |
| No-Load Speed | 77±10% RPM |
| Rated Speed | 60±10% RPM |
| Rated Torque | >4.0 kgf·cm |
| Stall Torque | >16.0 kgf·cm |
| Noise | ≤60 dB (L = 70 cm) |
Gearmotor Technical Data
| Gearmotor Model | Ratio | Voltage | No-Load Speed | No-Load Current | Rated Speed | Rated Current | Rated Torque | Stall Current | Stall Torque |
| GM2140FD-0001 | 1:169.2 | 12 VDC | 77±10% RPM | ≤160 mA | 60±10% RPM | ≤700 mA | >4.0 kgf·cm | ≤3.2 A | >16.0 kgf·cm |
Mechanical Interface & Mounting
| Main body length shown | 110.5 ± 0.3 mm |
| Main body width shown | 36.12 mm |
| Main body thickness shown | 22 ± 0.2 mm |
| Output gear | Module 1.0, 18 teeth |
| Output gear diameter shown | Ø14.18 ± 0.05 mm |
| Mounting holes shown | 5 × Ø6 ± 0.05 mm |
| Rotation reference | CW / CCW |
| Stall operation | Not allowed |
Dimension Drawing
Engineering Advantages for Smart Lock Projects
Slim high-torque smart-lock drive package
The 110.5 mm-class gearbox housing combines a slim mechanical layout with an external output gear for embedded lock-body transmission designs.
12 VDC drive matching
The engineering drawing specifies 12 VDC rated voltage, a 6.6–14 VDC working range, 77±10% RPM no-load speed, and 60±10% RPM rated speed.
High-torque output reference
The supplied engineering drawing specifies >4.0 kgf·cm rated torque, >8 kgf·cm at 1.3 A, >9 kgf·cm at 1.5 A, and >16 kgf·cm stall torque.
Current and stall-protection design
No-load current is specified at ≤160 mA, rated current at ≤700 mA, and stall current at ≤3.2 A. The drawing explicitly marks stall operation as not allowed, so stall duration should be limited by the control system and validated in the actual lock mechanism.
Mechanical integration
The drawing provides the 110.5±0.3 mm main body length, 5 × Ø6±0.05 mm mounting-hole references, an 18-tooth module-1.0 output gear, and detailed center-distance dimensions for lock-body integration.
Bidirectional and customization-oriented engineering
CW/CCW rotation is specified. Voltage, reduction ratio, output interface, wiring, noise, speed and torque targets can be evaluated around the customer’s actual lock body and test standard.
Main Applications
Smart Door Locks
Drive for latch / bolt transmission mechanisms requiring compact packaging, low-voltage operation and repeatable opening/closing motion.
Electronic Cabinet & Locker Locks
Suitable for compact electromechanical locking mechanisms where installation space and controlled actuation are important.
Hotel / Access-Control Lock Mechanisms
Can be evaluated for lock-body actuation requiring repeated cycles and consistent low-voltage drive performance.
Customized Locking Mechanisms
For non-standard lock bodies, the motor, ratio, pinion/interface, lead wire and terminal can be evaluated against the customer’s mechanism and test standard.
Customization Range
Electrical Configuration
Working voltage / winding configuration, rotation direction, lead wire length and terminal options.
Performance Matching
Gear ratio, target output speed, rated load point, current limit and torque margin based on the real lock mechanism.
Mechanical Interface
Output pinion / shaft interface, mounting features and connection to the customer’s lock-body transmission.
Noise & Reliability
Gear meshing, backlash, lubrication, motor operating point, assembly consistency and complete-lock resonance optimization.
Control / Feedback Integration
Hall sensor, encoder or other feedback functions can be evaluated when required by the project; availability depends on the final structure and specification.
FAQ
Q1. How can noise be reduced in a smart lock gear motor?
Low-noise performance depends on motor speed, gear material and accuracy, gear ratio, backlash, lubrication, assembly consistency, lock-body resonance, and the control profile. For reliable evaluation, noise should be tested in the actual smart lock mechanism, including startup, running, reversing, and end-position impact, rather than relying only on no-load motor noise.
Q2. Can a smart lock motor still provide enough torque when the battery is low?
Yes, but the motor and gearbox must be selected based on the minimum operating voltage of the battery, not only the rated voltage. Low-voltage testing should simulate real conditions such as increased latch friction, door pressure, low temperature, and repeated unlocking to verify starting current, unlocking time, torque margin, and temperature rise.
Q3. How should stall or jam protection be handled in a smart lock motor system?
Stall protection should be handled by the motor, lock mechanism, and control system together. Common methods include current detection, operation timeout, end-position detection, reverse recovery, mechanical limits, and fault alarms. Peak current and stall duration should also be controlled to reduce the risk of motor overheating or mechanical damage.
Q4. How do I place an order with Shunli Motor?
Please send us your application requirements or motor specifications. Our engineering team will develop a suitable solution, confirm the technical details, and provide samples for evaluation. Once the samples are approved, we will arrange mass production. Shipping methods can be selected based on your delivery requirements.
Product Categories
Enable Customized Solutions to Be Implemented Faster
Whether you're in the product concept, prototype development, or mass production phase, Shunli Motors can help you find the right micro geared motor drive solution based on your specific application needs.
Submit your product requirements now and get selection advice from our engineers.
Related Products
The Spur Gear Motor combines a DC motor with a multi-stage spur gearbox to provide a mature, efficient, and cost-effective drive solution for compact transmission mechanisms. Its simple gear structure supports flexible ratio, shaft, and mounting customization, making it suitable for smart home devices, commercial equipment, automotive actuators, smart landscaping systems, and industrial automation. It is a practical choice for projects that need a balance of output speed, torque, reliability, manufacturability, and cost.
The GM12 Series is a compact 12 mm-class DC spur gear motor platform developed for miniature mechanisms that require efficient speed reduction, controlled output, and cost-effective integration in limited space.
The GM13AM Series is a compact 13 mm-class DC spur gear motor designed for miniature mechanisms that require efficient speed reduction, stable low-speed output, and cost-effective transmission in a limited installation space.
The Planetary Gear Motor uses a compact coaxial planetary gearbox to deliver higher torque density and stable transmission within limited installation space. Multiple planet gears share the load, making the structure suitable for applications that require compact size, reliable load handling, and frequent start-stop or reversing motion. It is widely used in robotics, medical equipment, industrial automation, automotive actuators, precision mechanisms, and other compact motion systems. Final selection should consider output speed, continuous and peak torque, duty cycle, backlash, current, and installation requirements.
The DC Worm Gear Motor combines a DC motor with a worm gearbox to provide right-angle transmission, high reduction ratios, low-speed output, and strong load-driving capability in a compact structure. Its 90° output arrangement is well suited to valves, lifting and adjustment mechanisms, doors and windows, vending equipment, and other actuators where space layout or load-holding performance is important. Depending on the gear geometry and operating conditions, some worm gear designs may provide holding or self-locking characteristics, which should be verified for the actual application.
The GM16 Series is a compact 16 mm-class DC spur gear motor platform designed for miniature transmission systems that require efficient speed reduction, controlled low-speed output, cost-effective construction, and repeatable mass production.
The GM25AM310/370 is a 25 mm-class DC spur gear motor platform combining a compact multi-stage gearbox with PMDC 310 or 370 motors. The supplied technical data covers gearbox options from 3 to 8 stages, multiple reduction ratios, and two reference gearmotor configurations: GM25AM310-217K at 3 VDC and GM25AM370-99K at 12 VDC.
The GM24 Series is a compact 24 mm-class DC spur gear motor platform developed for small transmission mechanisms that require efficient speed reduction, stable output, and cost-effective mass production.
Navigation
Navigation
Product Categories
Product Categories
Contact Us
Get in Touch
Get in Touch
Request a Quote
Youtube
Tiktok
Linkedin
Instagram
Facebook
WhatsApp
WeChat
