Bolt locking force
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Why is it recommended that the bolt locking torque value is 70-80% of the torque value? Wouldn’t it be less likely to loosen if the locking torque reaches 100%?
You can get a few M8 and M10 bolts to do a damage test (the bolts will not be able to be tightened if the force is too large). After the torque exceeds the specified value, the bolts will begin to yield and deform until they break. The larger the locking force, the better, as long as it meets the requirements of the working conditions. It is useless to have more.
On the premise of ensuring the sealing effect, it is better to keep the pre-tightening force small. If it reaches 100%, there will be no room for further tightening, which will also affect the service life. After cooling to a cold state, it will be difficult to disassemble.
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