FUNDAMENTAL PARAMETERS OF BALL SCREW NUT
Screw nut is one of the important parts in machinery, which is mainly used to convert rotary motion into linear motion or linear motion into rotary motion. Only by correctly understanding the parameters of the screw nut can the selection be made.
1. Thread specifications: the thread specifications of screw nuts are classified according to national standards, such as M10, M12, M16 and M20. Different specifications of threads correspond to different bolt diameters and pitches.
2. Pitch: pitch refers to the distance that the bolt moves in the nut when the screw nut rotates once. Generally speaking, the smaller the pitch, the higher the transmission accuracy, but at the same time it also needs higher machining accuracy and a more complicated transmission system.
3. Length: The length of the screw nut is selected according to actual needs. Generally speaking, the increase in length can improve the rigidity and stability of the transmission system, but it also requires higher cost and heavier weight.
4. Accuracy grade: the accuracy grade of the screw nut is also selected according to actual needs. The higher the accuracy level, the higher the transmission accuracy, but at the same time, it also needs higher machining accuracy and a more complicated transmission system.
5. Material: the screw nut is generally made of high-strength alloy steel or stainless steel to improve its wear resistance and corrosion resistance. At the same time, according to the actual needs, we can also choose different surface treatment methods, such as zinc plating and plastic spraying.
6. Pre-load: the pre-load of the lead screw nut refers to the pre-tightening force applied to the nut during installation. Proper preload can improve the rigidity and stability of the transmission system, but excessive preload can also lead to premature wear and fracture of bolts.
7. Anti-loosening device: the anti-loosening device of the screw nut is used to prevent the bolt from loosening. Common locking devices include spring washer, check washer, etc.
Generally speaking, we should choose the screw nut according to the actual needs. At the same time, correct installation and maintenance are also the key factors to ensure the normal work of the screw nut. Please contact us if you have other questions or purchase requirements.
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