1. Before using the check whether thread rough, if any, between threads or contaminants iron filings, these things often leads to a locked.

2. Before using can give fasteners do lubrication processing

Suggest to use butter, mos2, mica, graphite or talcum powder to do lubrication, currently with dip the treatment wax to do lubrication antilock.

3. Use gasket can effectively prevent the locked tight.

4. To choose the right products

5. When using note method of use

A, the speed of the batter to appropriate power, don't too much too fast, as far as possible choose torque wrench or socket wrench, avoid using adjustable wrench or electric wrench. Too fast will make temperature shot up and cause locked.

B. the direction of the force, nuts must be perpendicular to the axis of the screw on the batter.

 
Locked or bite dead often happen in stainless steel, aluminum alloy and titanium alloy material fasteners, the metal alloy itself has the anti-corrosion and will hurt in the surface, in the metal surface to produce a thin layer of oxidation layer to prevent further rust. When stainless steel fasteners be lock, which may arise between the teeth lines of pressure and heat will disrupt the oxidation layer, make metal threaded between jam or cut, and the phenomenon of defect occurred.
 



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