Precision Bolting with Intelligent Process Control

The AC Servo Electric Torque Wrench combines a Japanese Panasonic AC servo motor, a precision planetary gearbox, and an intelligent tightening controller. Designed for demanding industrial bolting applications, it supports controlled torque delivery, programmable tightening sequences, and tightening data management.

Panasonic AC Servo Motor

• Precise Motor Control: Encoder feedback enables accurate control of motor position and speed, supporting consistent tightening performance.
• Stable Operation: Responsive servo control helps maintain smooth operation under changing load conditions.
• Effective Heat Dissipation: Motor cooling supports extended operation within the specified duty cycle.
• Overload Capability: Supports temporary load variations within the motor’s rated limits.
• Brushless Motor Design: Eliminates carbon brush replacement and brush-related sparking.
• Low Operating Noise: Smooth motor operation helps reduce noise and vibration during use.

Advantages over Conventional Brushed Motor Systems

Servo control provides detailed feedback throughout the tightening cycle, allowing the controller to adjust speed and monitor the fastening process. This supports programmable rundown, staged tightening, and final tightening strategies.

With suitable torque and angle feedback, the system can apply torque control with angle monitoring, angle control with torque monitoring, or combined torque-and-angle acceptance limits. These functions provide greater visibility into joint behavior than basic torque-only tightening.

Precision Planetary Gearbox

• High-Strength Alloy Steel Gears: Designed to withstand high torque loads and repeated bolting cycles.
• Precision Gear Manufacturing: Advanced hobbing, shaping, and grinding processes achieve gear accuracy grades of 6–7.
• Optimized Gear Geometry: Developed with gear technology specialists to support stable power transmission.
• Fatigue-Tested Design: Engineering calculations and extended fatigue testing support gearbox durability.
• Automatic Speed Adjustment: Adapts speed through the tightening cycle for efficient rundown and controlled final tightening.

Intelligent Tightening Functions

• Pass/Fail Indication: Red and blue indicator lights provide clear tightening status feedback.
• Intelligent Calibration: Supports calibration adjustments for different operating conditions.
• Programmable Tightening Sequences: Supports staged tightening and controlled final tightening to suit the specified assembly process.
• Torque and Angle Monitoring: Checks tightening results against configured limits to help identify abnormal fastening behavior.
• Repeat-Tightening Control: Helps reduce unintended additional tightening of an already completed joint when the corresponding control function is enabled.
• Remote Process Management: Supports remote parameter delivery, tool control, and process monitoring.
• Optional Barcode or QR Code Input: Allows compatible configurations to load tightening parameters by scanning a job or component code.

Data Recording and Traceability

The system supports tightening data recording, downloading, and transfer through compatible Wi-Fi or hotspot connections. Tightening records can be reviewed for process analysis and integrated into a compatible MES for production quality management.

Typical Applications

Suitable for heavy equipment assembly, power generation, mining machinery, steel structures, and industrial maintenance where controlled tightening and traceable results are required.

Model	Min torque (N.m)	Max torque (N.m)	S	D	L1	L2	L3	H	R1	R2	Weight	Max speed
				mm							（Kg）	rpm
ETW-05	150	500	3/4＂	60	305	80	100	300	53	102	4.5	40
ETW-10	200	1000	3/4＂	60	305	90	100	300	53	102	5.5	30
ETW-20	350	2000	1＂	76	305	95	100	300	66	135	6	14
ETW-30	600	3000	1＂	86	305	100	100	300	78	145	9.8	6.5
ETW-40	800	4000	1＂	95	350	125	100	310	78	145	10	5.5
ETW-60	900	6000	1-1/2＂	110	350	130	110	310	80	150	13.3	4
ETW-80	1500	8000	1-1/2＂	117	350	150	110	310	90	155	16	3
ETW-100	2000	10000	1-1/2＂	125	380	150	120	310	93	158	18	2.5
ETW-150	2500	15000	1-1/2＂	138	380	150	120	310	95	160	22	1.5