Customer Name: Andrew
Industry: Smart door lock device
Cooperation time: January 2025
With the rapid development of smart homes and the growing awareness of security, smart door locks have become a key component in modern residential and commercial buildings across Europe and North America. These smart locks replace traditional mechanical keys with digital access methods such as fingerprints, PIN codes, mobile apps, and RFID.
To achieve automatic, quiet, and efficient unlocking mechanisms, a reliable gear motor is essential.
As more manufacturers enter the smart lock market, the need for compact, low-noise, energy-saving gear motors has significantly increased
Our client, a European smart lock manufacturer, approached BG Motor with a demand for a compact gear motor to fit into a newly designed high-security digital door lock. The main technical challenges were:
Limited internal space in the lock body, requiring ultra-compact motor dimensions
High torque requirement to drive the locking bolt and ensure reliability
Low noise operation, with target noise level under 35 dB
Compatibility with a 4xAA battery system, requiring low power consumption
Long lifespan to support over 30,000 cycles with minimal maintenance
Need for rapid response and stable performance under various temperatures
After multiple rounds of technical discussion and prototype evaluation, BG Motor provided a customized micro DC gear motor solution. The selected motor featured:
12V DC voltage with optimized gear ratio (1:200) to deliver torque up to 2.5 kg.cm
Full metal gearbox to ensure durability and torque consistency
Special noise-dampening grease and refined gear teeth for quiet operation (<35 dB)
Compact structure (motor body under 27mm diameter), perfect for tight spaces
Optional magnetic encoder for position feedback and unlocking accuracy
Low current startup design to maximize battery life in standby and working modes
We also provided mechanical drawings, motor control suggestions, and adapted the motor shaft to perfectly match the client's internal locking structure.
To support our client’s mass production, BG Motor provided:
Sample motors with performance testing reports
Full sets of technical documentation (2D/3D drawings, wiring diagrams)
Ongoing engineering assistance during product integration phase
Regular batch testing reports to ensure product consistency
On-time delivery with flexible MOQ for initial product runs
Fast customization service for future product upgrades
The motor passed all client verification tests, including noise, torque, life cycle, and cold start conditions. It was successfully integrated into the final product and is now selling in multiple European countries through retail and online channels. The client praised BG Motor for our fast response, technical clarity, and high-quality motor performance.
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