Why do we use a longer wrench to open a tight nut?

We prefer to use a wrench with long arm because when the length of the arm(r) is long, the force (F) required to produce a given turning effect ( x ) is smaller. Hence, a nut can be unscrewed easily.

When you over tighten a nut or a bolt What happens to the threads?

One of the most damaging ways to do that is by over-tightening, or over torquing the fastener. This can result in stripping screws, snapping screw heads and damaging pre-tapped threading.

What wrench is used to prevent over tightening the nut or bolt?

Answer Torque wrench A torque wrench allows a mechanic to tighten a screw or bolt to a specific level of tightness without risking breakage due to too much pressure.

What is torque def?

torque, also called moment of a force, in physics, the tendency of a force to rotate the body to which it is applied.

What happens when you tighten a bolt?

What happens as a bolt is tightened? When using a traditional wrench to tighten a bolt, the torque applied to the nut causes it to slide up the inclined plane of the threads. This relative motion between the nut and the bolt attempts to reduce the distance between the bearing surfaces of the bolt and nut.

What happens when you over torque?

When the joint in question is over-torqued, the flange load can become uneven and weaken the effectiveness of the flange/bolt load. This in turn leads to an increase in blow-out pressure and hydrostatic force, which can cause joint failure.

How do I tighten a bolt?

Try to pick a wrench that is the closest size to the bolt and try different combinations of coins to get a snug fit. If the wrench is too small you can take a long nut and a bolt, screw the nut onto the bolt and tighten the bolt around the nut you want to tighten or loosen.

How do you tighten nut bolts?

Hold the shaft of the spanner and turn it clockwise as far as you can. If it is a ratchet spanner, turn it back anticlockwise when you can’t go any further, then turn it clockwise again to tighten it. Keep doing this until the nut is too tight to turn easily.