Stainless steel bolts are easy to lock up

Editor:Jiaxing UNITEK Machinery Technology Co., Ltd. │ Release Time:2021-11-10 

Because stainless steel has its own anti-rust properties, when the metal surface is damaged, an oxide protective layer will be formed on the damaged part to prevent further rust. When the stainless steel bolts are locked, the pressure and heat generated between the tooth patterns will destroy and erase the oxide layer between them, causing the tooth patterns to shear/block directly and adhere to each other, thereby causing locking.


Many specific factors can cause stainless steel bolts to lock up:

1. Inadequate cleaning: there are debris or metal shavings between the teeth, which will lock up when the bolts are locked.

2. Rotating force angle deviation: The bolt is not perpendicular to the nut during the rotating force, and it will be stuck if it is forced to rotate.

3. The tightening speed is too fast or the force is too strong: Too fast or too much force will cause the temperature to rise, thereby destroying the oxide layer and causing lock-up.

4. Failure to choose the right product: Choosing an inferior product, the surface is not smooth with impurities, the product process is unqualified, and the tooth pattern is flawed, etc., which will cause the bolt to lock up.


In view of the locking phenomenon of stainless steel bolts, corresponding measures can be taken to achieve the purpose of anti-locking:

1. Use proper rotation force and speed to smoothly tighten.

2. Lubrication can be carried out before tightening to reduce the heat generated by friction during tightening, so that the fasteners will not lock due to adhesion.

3. The angle of bolt and nut is perpendicular to the tightening. The most important thing is to choose the right product. The right product can effectively solve the lock-up phenomenon.