Electric torque wrench

File:Electric Torque Wrench.JPG

Electric Torque Wrench.

File:Electric Torque Wrench Calibration.JPG

Electric Torque Wrench on a calibration stand, wired to a computer via an infared cable.

An electric torque wrench is a planetary torque multiplier or a "Gearbox". This gearbox is mated to an electric motor. At the end of the "gearbox" is a reaction device that is used to absorb the torque. This allows the operator of the tool to use the Electric torque wrench with very little effort.

These tools are primarily used anywhere accurate torque is required on a nut and bolt, or where a stubborn nut needs to be removed.

These planetary torque multiplier Gearboxes have multiplication ratios up to 4000:1 The correct Torque output is adjusted by controlling the voltage.

The tool has an internal computer that shuts off the voltage at a certain level that is adjusted by the operator of the tool. Because of the internal electronics, the electric torque wrench can operate from 110, or 220. It can adjust in an instant up to 360 Volts. Since the tool is operated by electricity, there is a water proof version of the electric torque wrench available.

The benefit to the electric torque wrench is that it plugs into any wall outlet. And Runs virtually silent.

The Electric torque wrench is sometimes confused with a standard impact wrench, because it looks similar, but it actually a totally different tool. A Electric Torque wrench is driven by continuous Gearing, and not by the Hammers of an impacting wrench. This is why a Electric torque wrench has very little vibration, and an extreme amount of repeatability and accuracy. The Electric Torque Wrench was first Patented in Germany in 1982.

Electric Torque Wrenches have different models capable of 50Ft Lbs up to a max of 31,000Ft Lbs.

See also

• Pneumatic torque wrench
• Power tool
• Socket wrench
• Torque wrench
• Hydraulic torque wrench