External causes and preventive measures for locking


1. The product is not selected correctly. Before use, m […]

1. The product is not selected correctly. Before use, make sure that the mechanical properties of the product meet the requirements of use (such as the tensile strength of the screw and the load of the nut). In addition, the length of the screw should be selected appropriately to tighten the nut to one to two teeth.
2, rough teeth or foreign matter sticky, if solder joints and other metal scraps between the teeth, often lead to lock.
3, too much force or lock speed is too fast, try to choose a torque wrench or socket wrench, avoid using adjustable wrench or electric wrench. Because the electric wrench often causes the locking speed to be too fast, the temperature rises rapidly and locks up.
4. The angle of the force application direction is wrong. The nut must be screwed perpendicular to the axis of the screw. Do not tilt.
5. No gaskets are used. The use of washers and retaining rings can effectively prevent the problem of over-tightening of the lock.
Users who are new to the product or who are not familiar with stainless steel products should consult your supplier about the characteristics of stainless steel. In general, slowing down the lock can greatly reduce the chance of locking. When in use, the speed of locking the stainless steel fasteners should be lower than the speed of locking the carbon steel. The second is to use butter, molybdenum dioxide, graphite or talc to lubricate the inner and outer teeth before locking to reduce the lock. Deduction is also an effective means of lubrication. The nut that has been detained will be like
A layer of lubricating film is added between the nut and the screw. It is then recommended to use the same grade of screws and nuts.

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