Smart Lock Motor GM65ED
The GM65ED Smart Lock Motor is a compact DC gear motor engineered for smart door locks, electronic locks, access-control mechanisms, and other powered locking systems requiring high torque and controlled low-speed motion. The supplied 8 VDC reference configuration uses a 1:97 gear ratio, delivering 65 RPM rated output speed and 0.48 N·m (4.8 kgf·cm) rated torque, with 2.5 N·m (25 kgf·cm) stall torque. Its 58 × 65 mm gearbox layout, Ø28 mm DC motor, and integrated mounting features support space-efficient installation in smart lock bodies and actuator modules.
Product Overview
The GM65ED Smart Lock Motor is a compact DC gear motor engineered for smart door locks, electronic locks, access-control mechanisms, and other powered locking systems requiring high torque and controlled low-speed motion. The supplied 8 VDC reference configuration uses a 1:97 gear ratio, delivering 65 RPM rated output speed and 0.48 N·m (4.8 kgf·cm) rated torque, with 2.5 N·m (25 kgf·cm) stall torque. Its 58 × 65 mm gearbox layout, Ø28 mm DC motor, and integrated mounting features support space-efficient installation in smart lock bodies and actuator modules.
Model Information
| Model | Motor Type | Product Category |
| GM65ED | DC Brushed Gear motor | Smart Lock / Electronic Lock Motor |
Main Parameters
| Rated Voltage (reference performance table) | 8 VDC |
| Gear Ratio | 1:97 |
| Gearbox Efficiency | 30%–40% |
| Max. Rated Gearbox Torque | 15–25 kgf·cm |
| Max. Gearbox Break Torque | 30–50 kgf·cm |
| Gearbox Body Size Shown | 58 × 65 × 23.8 mm |
| Motor Diameter | Ø28 mm |
| Overall Length Shown | 121 mm |
Gearmotor Technical Data
| Gearmotor Model | Ratio | Voltage | No-Load Speed | No-Load Current | Rated Speed | Rated Current | Rated Torque | Stall Current | Stall Torque |
| GM65E | 1:97 | 8 VDC | 77 RPM | ≤ 280 mA | 65 RPM | ≤ 1500 mA | 0.48 N·m / 4.8 kgf·cm | ≤ 8500 mA | 2.5 N·m / 25 kgf·cm |
Mechanical Interface & Mounting
| Gearbox body dimensions shown | 58 × 65 × 23.8 mm |
| Motor diameter | Ø28 mm |
| Overall length shown | 121 mm |
| Mounting holes | 3 × Ø5.1 ± 0.1 mm |
| Output interface diameter | Ø16 +0.1/0 mm |
| Secondary interface diameter | Ø13 +0.1/0 mm |
| Lead wire shown | UL1007 22AWG, red / black, 260 ± 10 mm |
| Connector / rotation reference | PH2.0-2P / CCW |
Dimension Drawing
Engineering Advantages for Smart Lock Projects
Compact smart-lock drive package
The 58 × 65 mm gearbox layout and Ø28 mm motor are suited to smart-lock and electronic-lock mechanisms where torque capability and integrated mounting are important.
High-torque low-speed matching
The supplied 8 VDC, 1:97 reference configuration delivers 65 RPM rated speed and 0.48 N·m rated torque. Final selection should be validated against the lock’s minimum supply voltage and actual latch load.
Torque margin for demanding lock mechanisms
The supplied gearbox specification lists 15–25 kgf·cm maximum rated torque capacity and 30–50 kgf·cm maximum break torque, while the reference gearmotor operating point is 4.8 kgf·cm rated torque.
Current data for driver and protection design
Specified no-load, rated and stall-current limits provide a basis for power-supply, driver and protection design. Stall duration should still be limited by the control system.
Integrated mounting and output interface
The supplied drawing provides mounting-hole, output-interface and wiring dimensions for integration into the customer’s lock body or actuator module.
Customization-oriented engineering
Voltage, ratio, output interface, wiring/terminal and noise/lifetime targets can be evaluated around the customer’s actual lock body, load and duty cycle.
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.
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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.
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