How to prevent stainless steel fasteners from being locked out:
1. Correct product selection: Before use, confirm whether the mechanical properties of the product can meet the needs of use, such as the tensile strength of the screw and the guaranteed load of the nut. The length of the screw should be selected appropriately, and the 1-2 pitch of the nut will be exposed after tightening.
2. Before use, check whether the thread is rough, and whether there is iron filings or dirt between the threads. These things often lead to locking.
3. Lubricate the fasteners before use: It is recommended to use butter, molybdenum disulfide, mica, graphite or talc for lubrication. At present, dipping wax is generally used for lubrication and anti-locking.
4. Pay attention to how to use:
a. The speed and force of the screwing-in should be appropriate, not too fast or too large. Use a torque wrench or socket wrench as much as possible, and avoid using an adjustable wrench or an electric wrench. Excessive speed will cause the temperature to rise rapidly and cause lock-up.
b. In the direction of force, the nut must be screwed in perpendicular to the axis of the screw.
5. The use of washers can effectively prevent the problem of over-tightening.
6. Locking or seizure often occurs on fasteners of stainless steel, aluminum alloy and titanium alloy materials. These metal alloys themselves have anti-corrosion properties. When the surface is damaged, a thin oxide layer will be formed on the metal surface. to prevent further corrosion. When the stainless steel fastener is locked, the pressure and heat generated between the teeth will destroy the oxide layer, causing blocking or shearing between the metal threads, and then sticking. When this phenomenon persists, the stainless steel fasteners will be completely locked and can no longer be removed or continued to lock. Usually this series of blockage_cut_adhesion_locking occurs in just a few seconds, so the correct understanding of the use of this type of fasteners can prevent this phenomenon.
