Powerfix Profi + Torque Wrench

IAN: 66290

Measuring range: 28-210Nm
12.5mm (1/2″) drive
Measuring tolerance: +/- 4%
Includes 12.5mm (1/2″) extension (length: 125mm) and 3 sockets (17-19-21mm)
Reversible ratchet for clockwise and anticlockwise use
5 piece set

A torque wrench with a ratcheting mechanism is a specialized tool designed to apply a specific amount of torque to a fastener, such as a nut or bolt. Torque is the rotational force applied to tighten or loosen a fastener to a predetermined level. The ratcheting mechanism in a torque wrench allows it to be used in a way similar to a regular ratchet, but with the added feature of setting and measuring torque. Here’s how a torque ratchet typically works:

  1. Ratcheting Mechanism:

    • A torque ratchet features a ratcheting mechanism that allows the tool to turn the fastener in one direction (usually tightening) while preventing movement in the opposite direction. This mechanism enables users to apply torque efficiently without having to reset the tool for each turn.
  2. Handle and Head:

    • The torque ratchet consists of a handle and a head. The head typically has a square drive to accommodate different-sized sockets.
  3. Torque Adjustment:

    • Torque wrenches have an adjustable torque setting. This setting is often adjustable using a scale or a micrometer-type adjustment mechanism near the handle. Users can set the desired torque level by turning the adjustment knob or handle.
  4. Scale or Display:

    • Many torque ratchets have a scale or a digital display that indicates the applied torque in units such as Newton-meters (Nm) or foot-pounds (ft-lbs). This helps users monitor and control the amount of torque being applied.
  5. Click-Type Mechanism:

    • Click-type torque wrenches are common. As the user applies torque to the fastener, the wrench emits an audible “click” sound when the preset torque level is reached. This click indicates that the desired torque has been applied, and the user should stop turning the wrench.
  6. Cam-Over Wrench Mechanism:

    • Some torque wrenches, particularly those with higher precision requirements, use a cam-over wrench mechanism. In this design, the wrench’s handle continues to turn after reaching the set torque until a specific point where the wrench “cams over,” preventing further torque application. This design minimizes the risk of over-torquing.
  7. Release and Reset:

    • After reaching the desired torque, the user releases pressure on the wrench. Some torque wrenches require resetting to the minimum torque setting before storage to maintain accuracy.
  8. Calibration:

    • To ensure accuracy, torque wrenches need periodic calibration. Calibration involves comparing the wrench’s measurements to a known standard and adjusting if necessary. Regular calibration helps maintain the tool’s precision.

It’s crucial to follow the manufacturer’s instructions for using and maintaining a torque ratchet, as improper use can lead to inaccuracies or damage. Additionally, torque wrenches should be stored properly and kept in protective cases to prevent damage and maintain calibration.

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