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In the field of mechanical transmission, a special characteristic of the trapezoidal Lead Screw compared to the ball screw is its unique self-locking property.
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According to relevant research and industry practices, after the trapezoidal lead screw operates to a certain position, it exhibits a special performance - it can steadily hold the load without the need to rely on additional holding devices such as brakes. This characteristic enables it to have a higher safety factor when facing sudden situations like motor stalling, undoubtedly providing a "safety lock" for the operational stability of related equipment.
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It should be noted that NOT all trapezoidal screw rods can achieve self-locking. Industry experts point out that when the diameter of the screw shaft is relatively small and the pitch is relatively large, or when the diameter is small and the lead is large, the self-locking effect cannot be achieved. The principle of its self-locking can be roughly understood as that only when the component force of the object along the slope direction is smaller than the frictional force, ?the effective self-locking is realized. (When a positive pressure F is applied to the nut under the rated load when the helix angle ? is smaller than the equivalent friction angle R, the lead screw and nut will be in a state where they cannot slide, and this is the self-locking of the leadscrew.)
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Generally speaking, as long as the helix angle is smaller than the friction angle, the trapezoidal screw rod can achieve self-locking. Moreover, when the thread angle is smaller than 20°, its self-locking effect is relatively better.
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The Lead Screws of Hojama include Trapezoidal Thread Screw、ACME Thread Screw、Metric Thread Screw、Knuckle Thread Screw、Gothic Thread Screw、Self-reversing Thread Screw.
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September 27, 2024
October 18, 2024
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