In the fast-paced global manufacturing industry, efficiency and precision are the core competitiveness of enterprises. For assembly processes that require multiple screws to be locked simultaneously, traditional single-bit screw locking machines or manual operations often face bottlenecks such as low efficiency, high labor costs, and inconsistent quality. To help global clients break through these constraints, Dongguan Sudizhi Automation is pleased to launch our upgraded Double-Bit Automatic Screw Locking Machine — a high-performance automation solution that integrates double-bit synchronous operation, intelligent control, and wide compatibility, bringing revolutionary upgrades to the assembly lines of various industries.

Core Product Features

Our Double-Bit Automatic Screw Locking Machine is designed with industrial-grade stability and intelligent innovation, focusing on solving the pain points of high-efficiency assembly, with the following core advantages:

1. Dual-Bit Synchronous Operation, Doubling Production Efficiency

Equipped with two independent high-precision screwdriver bits and dual Z-axis design, the machine realizes synchronous locking of two screws at one time, which directly doubles the lock efficiency compared with single-bit machines. It adopts advanced blowing/vacuum suction dual-mode feeding technology, which is suitable for short screws that cannot meet the requirements of blowing type feeding, ensuring stable and smooth screw supply without jamming. The locking speed can reach 0.5-0.8 seconds per screw per bit, and the hourly output can reach 1500-2000 screws, which is 5-10 times that of manual operation, greatly shortening the assembly cycle and improving production capacity.

2. High-Precision Torque Control, Zero Defect Assurance

Each screwdriver bit is equipped with an independent digital servo electric batch and high-sensitivity torque sensor, with an adjustable torque range of 0.01-30 N·m and a precision of ±3%, which can accurately control the locking force of each screw. The intelligent anti-error system can real-time monitor and alarm for missing locks, floating locks, sliding teeth, and over-tightening, effectively avoiding product damage caused by improper locking force, and reducing the defective rate to less than 0.1%. At the same time, it supports real-time data recording and uploading to the MES system, facilitating quality traceability and production management.

3. Flexible Compatibility, Adapt to Diverse Production Needs

The machine is compatible with M1-M6 screws of various lengths and types, including cross, flat, hexagonal, and other common screw types, and can flexibly adapt to the assembly needs of different products. It adopts a dual-station design, with two stations working independently without interference; while one station is locking screws, the operator can load and unload products on the other station, realizing continuous production without downtime, which is especially suitable for small-batch and multi-variety production scenarios. Replacing products only needs to replace the fixture and store the position coordinates of the product, with strong interchangeability.

4. Intelligent Operation & Easy Maintenance

Equipped with an intuitive touch screen operation panel, parameters such as torque, speed, and locking count can be set with one key, and operators can master the operation skills within 10 minutes, reducing training costs. The core components (motor, sensor, electric batch) adopt international famous brands (Panasonic, Mitsubishi), with industrial-grade aluminum alloy and high-strength steel structure, ensuring 24-hour stable operation, MTBF (mean time between failures) > 8000 hours, and low daily maintenance cost. It is also equipped with an automatic fault alarm function (screw jamming, material shortage) and emergency stop device, which improves the safety and operability of the equipment.

5. Humanized Design, Reduce Labor Burden

The machine adopts a compact and mobile design, with a small footprint, which can be flexibly placed in various assembly lines and easily moved between different production positions. The optional automatic clamping device (five-cylinder structure) can firmly fix the product, avoiding manual pressing, reducing operator fatigue, and improving operation safety; at the same time, it avoids screw contamination caused by manual contact, preventing rust and affecting product quality.

Key Customer Pain Points Solved

Our Double-Bit Automatic Screw Locking Machine directly targets the most prominent pain points in the current screw locking assembly process, providing targeted solutions for global manufacturers:

Customer Pain Point	How Sudizhi’s Double-Bit Machine Solves It
Low single-bit efficiency, long assembly cycle, unable to meet delivery requirements	Dual-bit synchronous operation, doubling the locking efficiency; hourly output up to 2000 screws, significantly shortening the production cycle and ensuring on-time delivery.
High labor cost, high turnover rate, and high training cost for manual/single-bit operation	1 machine can replace 3-4 manual workers, supporting 24-hour continuous operation; simple operation, reducing training time and turnover impact, saving 150,000-200,000 US dollars in annual labor costs.
Inconsistent torque, high defective rate (2-5%), and high rework cost	Independent precision torque control for each bit, defective rate reduced to <0.1%; intelligent anti-error alarm, avoiding rework caused by missing locks, sliding teeth, etc., and reducing rework costs by 90%+.
Long product changeover time, affecting production efficiency in small-batch and multi-variety production	Quick fixture replacement and parameter setting, changeover time <1 minute; dual-station continuous operation, no downtime during product changeover, perfectly adapting to flexible production needs.
Short screws cannot be fed by blowing type, and manual feeding is inefficient and error-prone	Adopting blowing/vacuum suction dual-mode feeding technology, it is suitable for short screws that cannot meet the blowing type requirements, realizing automatic feeding and avoiding manual feeding errors.
Product damage caused by unstable manual clamping or improper locking force	Optional automatic clamping device fixes the product firmly; precise torque control avoids over-tightening or under-tightening, protecting product components from damage (especially plastic and fragile parts).

Successful Industry Application Cases

Since its launch, Sudizhi’s Double-Bit Automatic Screw Locking Machine has been widely applied in various industries around the world, helping clients achieve significant improvements in efficiency, quality, and cost control. Here are typical cases:

1. Automobile Parts Industry

– Client: A well-known automobile parts manufacturer in Guangdong (exporting to Europe and North America)

– Challenge: Locking 4 screws on automobile sun visors and door panels; requiring synchronous locking of two screws, high torque consistency, and avoiding product deformation; short screws cannot be fed by blowing type, and manual feeding is inefficient.

– Result: Adopting our double-bit automatic screw locking machine, realizing synchronous locking of two screws, 5 seconds to complete the locking of two products, and the efficiency increased by 120% compared with the original single-bit machine; the defective rate dropped from 3.2% to 0.08%; the dual-mode feeding solved the problem of short screw feeding, saving 3 operators per production line, with an annual labor cost saving of more than 180,000 US dollars; it meets the IATF 16949 automotive industry standard, and the product qualification rate reaches 99.92%.

2. Consumer Electronics & 3C Industry

– Client: A large 3C product OEM in Dongguan (producing tablets and smart speakers, exporting to Southeast Asia)

– Challenge: Each product needs to lock 6-8 screws, with small screw size (M2-M3) and high precision requirements; multi-model mixed production, frequent product changeover, and long downtime of the original equipment.

– Result: The double-bit synchronous operation shortens the assembly time per product from 45 seconds to 18 seconds, and the daily output increases by 150%; the quick changeover function reduces the downtime by 80%, perfectly adapting to multi-model production; the precision torque control avoids scratches on the product surface and internal component damage, and the customer’s order satisfaction rate increases by 35%.

3. Household Appliances Industry

– Client: A European small household appliance brand (producing coffee machines and blenders)

– Challenge: The plastic shell of the product is easy to be damaged by excessive torque; multi-model mixed production, high requirements for production flexibility; the assembly line needs continuous operation to meet the large export order demand.

– Result: The independent torque control of each bit protects the plastic shell from damage, and the defective rate is reduced by 92%; the dual-station continuous operation realizes 24-hour production without downtime, and the assembly cost is reduced by 48%; the machine is compatible with various screw specifications of different models, and the product changeover only takes 30 seconds, which fully meets the customer’s flexible production needs.

4. LED Lighting & Transformer Industry

– Client: An LED panel light and transformer manufacturer in Zhongshan (exporting to Europe)

– Challenge: The PC components of LED lights are fragile, requiring low torque and high precision; transformers need to lock M6 outer hexagonal screws, requiring high efficiency and stable torque; manual operation is easy to cause component damage and low efficiency.

– Result: The precision torque control (down to 0.1 N·m) prevents the fragile components from cracking; the double-bit synchronous locking realizes 5 seconds per screw for transformers, and the production efficiency is increased by 80%; the rework rate is reduced by 95%, and the product qualification rate reaches 99.95%; the dual-mode feeding ensures the stable supply of screws of different specifications, and the production line stability is significantly improved.

5. Toy & Plastic Products Industry

– Client: A large toy OEM in Dongguan (exporting to the United States and Europe)

– Challenge: High-mix, low-volume production, frequent product changeover; manual locking is inefficient, and the error rate is high, which affects delivery reliability; the screws are small and easy to be contaminated by manual contact.

– Result: The double-bit machine solves the bottleneck of manual operation, the line efficiency is increased by 60%, and the number of operators is reduced from 8 to 3; the automatic feeding avoids screw contamination, and the product quality is more stable; the quick changeover function adapts to the production of multiple toy models, and the delivery reliability is increased by 35%.

Why Choose Dongguan Sudizhi?

1.10+ years of automation equipment R&D and production experience, with 5,000+ global installations, and rich experience in serving export-oriented enterprises.

2.Customized solutions: According to the customer’s product specifications, screw types (including short screws), and production needs, tailor-made double-bit locking solutions to meet personalized assembly requirements.

2.Global after-sales support: Provide 24-hour online technical consultation, 12-month free warranty, lifelong maintenance, and quick on-site service in major global regions to solve customer worries.

3.Certified quality: The product has passed CE, ISO 9001, IATF 16949 (automotive industry) certifications, complying with EU, North American and other international safety and quality standards, and can be directly exported to global markets.

Conclusion

For manufacturers pursuing high efficiency, high precision, and cost control, Sudizhi’s Double-Bit Automatic Screw Locking Machine is the optimal automation upgrade choice. It breaks through the efficiency bottleneck of traditional single-bit equipment, solves the pain points of multi-screw synchronous locking, and perfectly adapts to the flexible production needs of various industries. With double efficiency and double precision, it helps global manufacturers improve core competitiveness in the fierce market competition.

Contact us today for a free on-site evaluation and a tailored productivity solution, and let Sudizhi’s automation equipment empower your assembly line!

Dongguan Sudizhi Automation Equipment Co., Ltd.

Your Trusted Partner for Smart Assembly Solutions