Atlas Copco Tensor STR61‑200‑20 Angle Wrench (8436 6160 20)

The Atlas Copco Tensor STR61‑200‑20, also referenced as 8436 6160 20, is a high‑performance electric angle wrench from the ETV series, designed for heavy‑duty fastening in confined spaces. This tool delivers torque up to 200 N·m with exceptional precision, making it ideal for automotive chassis, heavy equipment, and structural assembly applications. Its compact 90‑degree head, robust gear train, and intelligent electronics ensure reliable performance and consistent joint integrity even in the most demanding environments.

Design and Ergonomics

The angle wrench features a slim, low‑profile gear head with a 20 mm offset, allowing operators to access fasteners in tight engine compartments, suspension components, and machinery interiors. The housing is constructed from impact‑resistant composite with a soft‑grip overmold to reduce vibration and user fatigue. An integrated LED work light illuminates the fastening area, improving accuracy in low‑light conditions. The tool weighs approximately 3.2 kg and is balanced for secure, one‑handed operation.

Control and Precision

Equipped with a brushless DC motor and a high‑resolution angle encoder, the STR61‑200‑20 delivers torque from 20 to 200 N·m with an accuracy of ±2.5% of the set value. The angle measurement resolution is 0.1°, enabling sophisticated tightening strategies such as torque‑control, angle‑control, and yield detection. The tool supports multi‑step programs, allowing operators to define snug, final, and re‑tightening stages within a single cycle.

Technical Specifications

• Torque Range: 20 – 200 N·m (adjustable)

• Free Speed: 90 rpm (nominal)

• Drive Size: 1/2″ square

• Angle Head Offset: 20 mm

• Voltage: 36 VDC (powered via controller)

• Weight: 3.2 kg

• Noise Level: < 78 dB(A)

• Vibration: < 3.0 m/s²

• Operating Temperature: 0 °C to +45 °C

Integration with Controllers

The angle wrench is fully compatible with Atlas Copco Power Focus and Tensor controllers (PF3000, PF4000, TC‑4000 series). It communicates via a dedicated cable using CAN‑bus protocol, enabling real‑time data exchange for torque, angle, and tool status. The controller can store multiple tightening programs and download them to the tool, allowing rapid changeovers. Firmware updates are performed via the controller's software suite.

Safety and Quality Assurance

The tool incorporates a dual‑safety shutdown feature: if the torque or angle exceeds preset limits, the motor stops instantly and an error signal is sent to the controller. A built‑in temperature sensor prevents overheating during prolonged use. Every tightening cycle is logged with a unique timestamp and can be traced back to the operator and workpiece via barcode integration, ensuring full compliance with ISO 5393 and VDI/VDE 2645 standards.

Applications

Typical applications include automotive suspension and chassis fastening, heavy equipment assembly, wind turbine bolting, and structural steel connections where high torque and restricted access are common.

Maintenance and Service

Routine maintenance includes lubrication of the angle gear every 500 operating hours, using Atlas Copco approved grease. The brushless motor requires no brush replacement. A comprehensive diagnostic routine, accessible via the controller, checks motor current, encoder health, and thermal performance.

Benefits for Production

By providing accurate high torque in a compact angle format, the STR61‑200‑20 reduces rework and increases productivity. Its robust construction ensures long service life in heavy‑use environments.

Conclusion

The Atlas Copco Tensor STR61‑200‑20 angle wrench is a reliable, precise, and ergonomic solution for demanding high‑torque fastening in confined spaces.