Torque Screwdriver

What is a Torque Screwdriver?

A torque screwdriver is an essential precision instrument engineered to tighten fasteners to a specific, controlled torque value. Its primary function is to eliminate the risk of over-tightening or under-tightening, which is critical in applications demanding exact clamping force. Industries relying on this precision include electronics assembly, medical device manufacturing, optics, gunsmithing, professional bicycle mechanics (especially for carbon fiber parts), and light-duty automotive work.

How It Works

A user sets a target torque value on an adjustable model, typically measured in Newton-meters (N·m) or inch-pounds (in·lb). When tightening, the tool’s internal mechanism provides clear feedback upon reaching the preset limit. This feedback can be an audible “click,” a slip/cam-over action, or a digital alert, which prevents further torque from being applied. This process guarantees repeatable accuracy, preventing thread stripping and component damage.

Common Types of Torque Screwdrivers

• Adjustable (Click-Type): The most common type, featuring a micrometer scale for setting torque and providing an audible click.
• Preset: Calibrated at the factory to a single torque value for repetitive assembly line tasks.
• Digital/Electronic: Offers an LCD screen for precise settings, data storage, and sometimes angle measurement.
• Slip/Cam-Over: The mechanism “slips” internally once torque is met, making over-tightening impossible.