Ergonomics or torque control? Until recently it’s been an either-or scenario. Manufacturers commonly think reduced-reaction fastener tools don’t provide the torque control they need. Today, however, assembly tools with reduced-reaction technology are highly accurate, easy to integrate and are more ergonomic than ever before.

When manufacturers need precise tightening functions, they typically seek a direct current (DC) tool because of its closed-loop control capability. This transducerized tool is highly accurate and provides traceable results. But, it also creates a kick-back into the operator’s hands because the tool’s motor is directly connected to the output shaft. The operator then absorbs this “torque reaction” from the tool when the fastener is fully tightened. If assemblers do not expect the torque reaction or are not properly prepared or positioned to safely absorb it, they can be injured. After repeated use, assemblers may experience discomfort or develop a chronic injury.

Alternatives to DC tools are impact wrenches or hydraulic pulse tools. These discontinuous-drive tools don’t send nearly as much force back to the operator. However, these tools typically are less accurate and harder to control.

In addition to the standard direct-drive mode, each tool configuration can be independently programmed to use one of the three available ETS modes. Ergonomic mode, with the lowest energy pulses, is ideal for hard joints or when arm, wrist or tool angles are most difficult. Performance mode, with medium energy pulses, is the best all-purpose mode. Productivity mode, with the highest energy pulses, is the fastest mode. It’s best for soft joints or when high production rates are required. In the standard direct-drive mode, the ETS modes are disabled and the tool behaves like any DC electric tool.

Tools equipped with ETS technology are easily identified on the line by red highlights on the housing. If the tool has ETS technology, a blue light will illuminate above the keypad to alert operators that the tool is operating in an ETS mode.

For more information on ergonomic fastening tools, click https://powertools.ingersollrand.com or visit the company’s booth at The ASSEMBLY Show South, which will be held April 30-May 2, 2024, at the Music City Center in Nashville, TN.