What torque settings for accessory screws.

As a newish teacher I am trying to get students to fix things with the correct amount of torque.

Tightening brass screws like they are wheel nuts does not give materials much of a lifespan.

So I bought a couple of torque screwdrivers, so they can quickly get a feel for how tight things should be.

However now I look at data sheets I can't seem to find Torque info for anything smaller than a a miniature circuit breaker.

The data sheets now often include other everyday information like Altitude.

Does anyone have some guidance for smaller brass screw torques, or know of a manufacturer that publishes such data?

Parents
  • Experience trumps a torque screwdriver.

    I had a discussion with the technical guys at a major consumer unit manufacturer a few years ago, because the quality of their screws was so bad I could actually pull some of the wires out with my fingers from the neutral and earth bar when the screw was at the correct torque.

    Another issue was they stated the same torque for a 1.0 mm conductor as a 10.0 mm, the 1.0 mm were crushed and the 10.0 mm barely nipped up.

    I am not convinced obsessive use of a torque screwdriver always improves the quality of an installation.

Reply
  • Experience trumps a torque screwdriver.

    I had a discussion with the technical guys at a major consumer unit manufacturer a few years ago, because the quality of their screws was so bad I could actually pull some of the wires out with my fingers from the neutral and earth bar when the screw was at the correct torque.

    Another issue was they stated the same torque for a 1.0 mm conductor as a 10.0 mm, the 1.0 mm were crushed and the 10.0 mm barely nipped up.

    I am not convinced obsessive use of a torque screwdriver always improves the quality of an installation.

Children
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