PRO-FUSE is a closed-loop, stepper-motor-driven electric precision screwdriver for S0.6~M3.0 screws, with a target torque setting range of 10.0~700.0 mN·m. It offers three operating modes (normal, self-tapping and high speed) and 16 tightening programs. Thread-finding detection, torque-rise detection and allowable-turn control in both forward and reverse directions allow precise management of floating screws and stripped threads.
PRO-FUSE Smart Precision Electric Screwdriver
PRO-FUSE is also widely recognized as the smallest automation smart electric screwdriver in the industry (also called a smart screwdriver), making it especially suited to space-constrained automated assembly stations.
Compact & Lightweight
A proprietary mechanical design achieves the industry’s smallest, lightweight form factor.
It can be paired with platforms such as vertical robots or articulated robot arms.
Torque Management
Proprietary current control technology lets you set and manage the screw tightening process and torque results.
Controls torque output with a top accuracy of ±5% of the current value.
Traceability Management System
The dedicated Pro-Fuse application “Pro-E Expert” lets you configure a wide variety of screw tightening programs and monitor the data returned by Pro-Fuse.
Industry-Standard Communication
Uses Modbus TCP communication for simple control from a PLC or robot controller.
Wide Range of Models
*Screw compatibility is for reference only; please select according to your actual application. If you have any questions about model selection, feel free to contact us at any time and our specialists will help you choose.
Custom Screwdriver Bits
Application Cases
Market Track Record and Integration Capabilities
- Specified by leading global consumer electronics brands: Vanguard smart electric screwdrivers are widely used in consumer electronics (3C) assembly for brands such as Apple, Samsung, HUAWEI and OPPO, earning a strong reputation in the market.
- Highly rated in AI server assembly: Facing the high-value, high-density, zero-defect assembly requirements of AI servers, this series of smart electric screwdrivers has earned excellent customer feedback for torque accuracy and full-process data traceability, and has been adopted on the production lines of several major manufacturers.
- Built for automated assembly: Integrates readily with robot arms, dedicated machines and all kinds of automation equipment. Drawing on long-standing partnerships with equipment makers in Taiwan and abroad, we provide complete mechanical and control solutions matched to your throughput requirements and space constraints.
- Extensive MES / Shopfloor integration experience: With many years in the industry, Utrun-Tech has extensive hands-on experience connecting and integrating data with MES and Shopfloor systems, sending the tightening history of every screw to the host system in real time to close the quality traceability loop.
Models and Specifications
| Item | TYPE S (PF-1-01-02-02-01-W) | TYPE L (PF-1-01-04-04-01-W) | TYPE XL (PF-1-01-06-07-01-W) |
|---|---|---|---|
| Screw size (mm) | S0.6 - M1.2 | M1.2 - M2.0 | M2.0 - M3.0 |
| Control method | Closed-loop | ||
| Motor | Stepper motor | ||
| Operating modes | 3 modes (normal, self-tapping, high speed) | ||
| Target torque setting range (mN·m) | 15.0-45.0 (normal) / 10.0-45.0 (self-tapping, high speed) | 50.0-180.0 (normal) / 30.0-180.0 (self-tapping, high speed) | 200.0-700.0 (normal) / 200.0-700.0 (self-tapping, high speed) |
| Max. rotational speed (rpm) | 1000 (normal, self-tapping) / 1500 (high speed) | 1000 (normal, self-tapping) / 1500 (high speed) | 1000 (normal, self-tapping, high speed) |
| Dimensions (width) (mm) | 30 | 30 | 47 |
| Dimensions (length) (mm) | 124 (excluding controller) | 152 (excluding controller) | 166 (excluding controller) |
| Weight (g) | Approx. 280 | Approx. 405 | Approx. 1000 |
| Rotation direction | Set on driver: CW (clockwise) / CCW (counterclockwise) | ||
| Thread-finding detection accuracy (mN·m) | 0.0-10.0 | ||
| Self-tapping initial torque range (mN·m) | 10.0-45.0 | 30.0-180.0 | 200.0-700.0 |
| Torque-rise detection time (s) | 0.01-1.00 | ||
| Allowable turns (– direction) (turns) | -10.0-0.0 | ||
| Allowable turns (+ direction) (turns) | 0.0-10.0 | ||
| Additional tightening angle (°) | -360.0-360.0 | ||
| Number of tightening programs | 16 | ||
| Input signals | Program 4 bits, tighten / loosen screw 2 bits, free rotation 1 bit, spare 3 bits | ||
| Output signals | Target torque reached 1 bit, Busy 1 bit, Error 5 bits, spare 1 bit | ||
| Power supply | DC24V (3A) | ||
Highlighted rows differ between models; values shared by all models are merged into one cell.
For full specifications and dimensional drawings, see PRO-FUSE Electric Precision Screw Tightening Machine Catalog (PDF).
Typical Applications
Automated tightening of precision electronics
Covering S0.6~M3.0 screws and a target torque of 10.0~700.0 mN·m with closed-loop control, it suits automated tightening stations for small screws in products such as mobile phones and wearables.
Thread forming and tightening of self-tapping screws
Self-tapping mode allows a separate initial torque range, so the resistance of the thread-forming stage is excluded before tightening judgment begins. Suitable for plastic parts and self-tapping holes.
Processes that must detect thread engagement errors
Thread-finding detection accuracy of 0.0~10.0 mN·m, torque-rise detection time of 0.01~1.00 s, and allowable-turn settings of up to 10 turns in each direction make it possible to detect failed thread engagement, insufficient turns and stripped threads.
Integration with PLCs or robot controllers
Program selection, tightening and loosening are controlled by I/O signals, and torque-reached, Busy and Error states are output, so it can be controlled directly by a PLC or robot controller.
Frequently Asked Questions
How do I choose between PRO-FUSE TYPE S, L and XL?
Choose based on screw size and required torque. TYPE S is for S0.6~M1.2 screws, with a target torque of 15.0~45.0 mN·m (normal mode)/10.0~45.0 (self-tapping and high-speed), 30mm wide, 124mm long and approx. 280g. TYPE L is for M1.2~M2.0, with torque of 50.0~180.0/30.0~180.0 mN·m, 152mm long and approx. 405g. TYPE XL is for M2.0~M3.0, with torque of 200.0~700.0 mN·m, 47mm wide, 166mm long and approx. 1000g. All lengths exclude the controller.
What is the difference between the normal, self-tapping and high-speed modes of the PRO-FUSE?
Normal mode is for pre-tapped holes and tightens directly to the set torque. Self-tapping mode is for self-tapping screws and allows a separate initial torque range (10.0~45.0 for TYPE S, 30.0~180.0 for TYPE L, 200.0~700.0 mN·m for TYPE XL) to avoid the thread-forming resistance before entering the final tightening judgment. High-speed mode raises the rotation speed to shorten the tightening time per screw: TYPE S and TYPE L reach a maximum speed of 1500rpm in high-speed mode (1000rpm in normal and self-tapping modes), while TYPE XL is 1000rpm in all three modes.
How does the PRO-FUSE detect stripped threads and floating screws?
It uses closed-loop control with multiple detection conditions: thread-search detection accuracy of 0.0~10.0 mN·m identifies whether the thread is properly engaged; torque rise detection time of 0.01~1.00 s judges whether the torque rises normally; allowable turns of 0.0~10.0 in the forward direction and -10.0~0.0 in the reverse direction check whether the number of turns matches expectations; and an additional tightening angle can be set from -360.0~360.0°. Errors are reported through the Error (5 Bits) output signals.
What are the control signals and power requirements of the PRO-FUSE?
Power supply is DC24V (3A). Input signals include program selection 4 Bits, tighten/loosen screw 2 Bits, free rotation 1 Bit and spare 3 Bits; output signals include target torque reached 1 Bit, Busy 1 Bit, Error 5 Bits and spare 1 Bit. 16 tightening programs can be stored, and rotation direction is set to CW (clockwise) or CCW (counterclockwise) by the Driver.