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Torque Screwdriver – Introduction, Features, And More.

Torque Screwdriver


Torque is the measure of rotating strength applied to twist an object. A torque screwdriver is a tool that turns screw head fasteners to a precise and uniform tension. The English system measures torque in units of foot pounds or inch pounds, and the metric system uses Newton meters.

Manually powered, pneumatic, and electric versions of the torque screwdriver are available to meet the needs of almost any size project. Most torque screwdrivers are adjustable within a range of torque strengths to accommodate multiple applications.

Manual torque screwdrivers generally have an in-line drive shaft and handle similar to the traditional screwdrivers. Electric models may have this same form or offset handle, making them look more like an electric drill. A pneumatic or air-powered torque wrench almost always looks like a drill and is typically the most potent variety of torque screwdriver.

The Unique Feature Of A Torque Screwdriver

The Unique Feature Of A Torque Screwdriver

The unique operational feature of a torque screwdriver is the pressure-sensitive clutch. This built-in limiter controls the maximum turning power applied to the screw by disengaging the drive connection at the preset torque level. Adjusting the clutch position allows the user to set the torque within the range offered by the tool.

Most manual and air-powered torque screwdrivers feature slip-clutch and cam-over designs that allow the tool to continue operating as the drive gears separate. Automatic shut-off clutches go further by powering down the electronic [torque screwdriver] to allow for even more precise torque control.

Manufacturing Of A Torque Screwdriver

Corporate manufacturing operations often use torque screwdrivers to attach multiple joints to a product with equal pressure. Torque screwdrivers significantly reduce the variations between screw fastener attachment standards when various builders complete a large project together.

Equally driven screws increase the structural integrity and overall stability of an assembled item. Overdriving a screw often splits the material or damages the screw threads, ultimately weakening the fasteners’ connection. Sending the screw too short may not drive it into the second surface and make the connection.

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What Does A Torque Screwdriver Look Like?

The appearance of torque screwdrivers varies, giving on whether the screwdriver is electric, cordless, pneumatic, or manual, as well as builder preference. Manual torque screwdrivers generally resemble even screwdrivers, although the shaft often remains shorter than a standard screwdriver, the grip is thicker.

Electric torque screwdrivers typically have a handle that resembles a power drill, as do pneumatic torque screwdrivers. Some torque screwdrivers derive with a set of bits to fit a variety of screws.


Torque regularly used screwdrivers are often tested and recalibrated to ensure a constant torque output. A torque tester machine is attached to the head of the tool to give a reading of the applied turning power once the [torque screwdriver] is fully engaged.

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