How to ensure that the countersunk hole of the countersunk magnet fits tightly with the screw to avoid loosening?

To ensure that the countersunk hole of the countersunk magnet fits tightly with the screw to avoid loosening, you can ensure that the diameter, length and other parameters of the selected screw are completely matched with the countersunk hole of the countersunk magnet. Generally, the diameter of the screw should be slightly smaller than the diameter of the countersunk hole so that a tight thread fit can be formed when tightening. According to the use environment and force conditions of the countersunk magnet, select the appropriate screw material and strength grade. For example, in situations where high-strength fastening is required, high-strength alloy steel screws can be selected.
When manufacturing countersunk magnets, the machining accuracy of the countersunk hole is crucial. This not only affects whether the screw can be installed smoothly and form a solid connection with the magnet, but also directly affects the stability and durability of the entire system. The various machining parameters of the countersunk hole must be strictly controlled to ensure that it meets the design requirements. In addition to machining accuracy, the surface treatment of the countersunk hole is also a very important link. Appropriate surface treatment can not only improve the friction characteristics between the screw and the hole wall, reduce resistance during tightening, but also improve the tightness of fit and the overall stability of the system.
Applying an appropriate amount of screw glue on the threaded part of the screw can enhance the adhesion between the screw and the countersunk hole and improve the fastening effect. The appropriate screw glue model and brand should be selected to avoid damage to the countersunk magnet or screw. Adding a spring washer between the screw and the countersunk magnet can play a buffering role during the fastening process, reduce the shock of the force on the screw, and thus avoid loosening. In certain cases, you can consider using fasteners such as locking plates or locking nuts to further improve the fastening effect.
When tightening the screws, you should control the appropriate pre-tightening force. Too little pre-tightening force may cause loosening, and too much pre-tightening force may damage the countersunk magnet or screw. Usually, tools such as torque wrenches can be used to control the size of the pre-tightening force. If there are multiple screw holes on the countersunk magnet, it is recommended to use a cross-tightening method, that is, pre-tighten the screws on the diagonal first, and then tighten the other screws in turn. This helps to ensure that each screw is evenly stressed and reduce the risk of loosening.
During use, the fastening of the countersunk magnet and the screw should be checked regularly to detect and deal with loosening problems in a timely manner. Clean and lubricate the countersunk magnets and screws regularly to reduce friction and wear and extend their service life.