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
  • I must admit I never had any "numbers" for torque - just enough so you can feel the screw just biting into the conductor is my rule of thumb - checked with a wiggle of the wire afterwards and a check that the screw then doesn't need any further tightening. Similar with compression plumbing fittings - you just turn until you can feel the increase in resistance as the olive biting into the pipe, and then just a fraction more. But then maybe I'm just old fashioned.

       - Andy.

Reply
  • I must admit I never had any "numbers" for torque - just enough so you can feel the screw just biting into the conductor is my rule of thumb - checked with a wiggle of the wire afterwards and a check that the screw then doesn't need any further tightening. Similar with compression plumbing fittings - you just turn until you can feel the increase in resistance as the olive biting into the pipe, and then just a fraction more. But then maybe I'm just old fashioned.

       - Andy.

Children
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