Trapezoidal screw (also known as threaded screw) is a common mechanical transmission element used to convert rotary motion into linear motion or to achieve force transmission. It consists of an arbor with a thread pitch and a nut that fits its thread. The thread shape of the trapezoidal screw usually adopts a trapezoidal section, so it is named the trapezoidal screw. The cross-sectional shape of the trapezoidal thread is similar to an isosceles trapezoid with symmetrical slopes on both sides. This thread shape allows the nut to move axially along the screw during rotational movement, achieving linear movement. The trapezoidal screw mainly has the following characteristics: 1. Lower transmission efficiency: Compared with the ball screw, the transmission efficiency of the trapezoidal screw is lower, mainly due to the greater friction. 2. Relatively simple manufacturing and low cost: The manufacturing process of the trapezoidal screw is relatively simple and the cost is low, which is suitable for some low-demand application scenarios. 3. Lower load-bearing capacity: Compared with ball screws, trapezoidal screws have lower load-bearing capacity and are not suitable for large loads and high-speed motion requirements. 4. Large clearance and return error: The trapezoidal screw may have large clearance and return error during the movement process, which is not suitable for applications that require precise positioning. Although the transmission efficiency and precision of the trapezoidal screw are relatively low, it is still widely used in some industrial equipment, automation systems, conveyor belts and other low-speed, low-precision or low-load occasions to achieve simple linear motion or force transmission.

Trapezoidal Screw: This is the core part of the trapezoidal screw, usually a metal rod with trapezoidal threads. The cross-section of a trapezoidal thread is trapezoidal in shape, hence its name. The threads on the screw usually include a ramp that allows the screw to push against the mating nut as it rotates, thereby achieving linear motion. Nut: The nut is a component that matches the thread of the trapezoidal screw, usually made of metal or plastic. The inside of the nut has a thread structure that matches the threads of the screw, allowing it to move linearly along the screw as it rotates. The design and manufacture of the nut can affect the performance of the lead screw, such as accuracy, load capacity and smoothness of motion.

Trapezoidal screws are widely used in printing. It is a screw with a threaded structure, usually used in conjunction with a nut. The thread of the trapezoidal screw usually adopts a trapezoidal cross-section, hence the name trapezoidal screw. In printing, the trapezoidal screw is used as a transmission element for axial motion to control the up and down movement of the print head and the lifting and lowering of the printing platform. Usually, the trapezoidal screw is matched with the nut, and the precise position control of the print head or printing platform is achieved through the movement of the nut on the screw. The trapezoidal screw can provide high-precision and stable motion transmission, allowing the printing device to accurately position the print head, thereby achieving high-quality printing effects. The characteristic of the trapezoidal screw is that it has self-locking properties, that is, when the force or torque stops being applied, the screw will not rotate automatically and can maintain the stability of its position. This feature is very important for printing applications because it ensures that the print head remains stable when it stops, avoiding position errors or printing quality problems. In addition to printing applications, trapezoidal screws are also widely used in other fields such as mechanical engineering, automation equipment, aerospace, etc., for precise position control and motion transmission. --

My suggestion is: if you want a longer service life, it is recommended to repurchase. If you want to repair it, the shipping cost is also an expense. Consider it comprehensively according to the degree of damage. Ball screw is a common mechanical transmission device used to convert rotary motion into linear motion. However, long-term use or improper maintenance may cause the ball screw to be damaged or malfunction. When there is a problem with the ball screw, we face an important decision: should we repair the ball screw or buy a new one? Option 1: Repair the ball screw 1. Economical: Repairing a ball screw is usually cheaper than buying a new one. If the ball screw has only experienced minor failures or wear, repair may be a more economical and reasonable option. Repair may involve replacing damaged parts or making adjustments and lubrication. 2. Time benefit: Repairing a ball screw usually takes less time than buying a new one. Buying a new ball screw involves selecting the right model, waiting for delivery and installation, while repairs can usually solve the problem faster. 3. Environmental considerations: Repairing a ball screw helps reduce waste generation and is in line with the concept of sustainable development. If the problem can be solved by repair, then repurchasing a new ball screw may be a waste of resources. Option 2: Repurchasing a ball screw 1. Severe damage: If the ball screw has suffered serious damage, including breakage or severe wear of key components, repairs may not be able to effectively fix the problem. In this case, purchasing a new ball screw is a more reliable option to ensure the normal operation of the system. 2. Technology update: Ball screw technology is constantly evolving, and a new generation of ball screws may have higher performance and longer service life. Repurchasing a new ball screw can upgrade and improve the system and improve overall performance. 3. Frequent failures: If the ball screw repeatedly fails or works unstably, repairs may only be a temporary solution. Repurchasing a reliable ball screw can avoid frequent repairs and downtime, and improve production efficiency and reliability. Conclusion: When facing a ball screw failure, we can choose whether to repair the ball screw or repurchase a new one according to the actual situation. If the problem is minor and the repair cost is low, repair may be a more cost-effective option. However, for severe damage, frequent failures, or the pursuit of higher performance, repurchasing the ball screw may be a more reliable solution. No matter which method you choose, consulting Nanjing Shuntai is the right choice. Welcome to consult our website https://www.nanjingshuntai.com for more information.

In industrial automation and precision equipment, trapezoidal lead screws are the core transmission mechanism for achieving rotary-to-linear motion, directly affecting the accuracy and stability of the equipment. However, practitioners often suffer from decreased equipment efficiency and shortened lifespan due to a lack of in-depth understanding of the principles and improper selection. This article will break down the motion principle of trapezoidal lead screws and provide a practical selection guide. I. Product Motion Principle and Related Parameters 1. Motion Principle: The trapezoidal lead screw converts rotational motion into linear motion through the meshing of the screw and nut, simultaneously transmitting energy and power. II. Product Features 1. Simple structure, convenient processing and operation, and economical cost; 2. Self-locking function is achieved when the thread helix angle is less than the friction angle; 3. Smooth and stable transmission process; 4. Relatively high frictional resistance, with a transmission efficiency in the range of 0.3~0.7. In self-locking mode, the efficiency is below 0.4; 5. Possesses a certain degree of impact and vibration resistance; 6. Overall load capacity is stronger than that of ordinary rolling screws. III. Selection and Verification Calculations For general force-transmitting screws, the main failure modes are thread surface wear, fracture under tensile stress, shearing, and shearing or bending at the thread root. Therefore, the main dimensions of the screw drive are determined primarily based on wear resistance and strength calculations during design. For transmission screws, the main failure mode is excessive clearance due to wear or deformation leading to decreased motion accuracy. Therefore, the main dimensions of the screw drive should be determined based on thread wear resistance and screw stiffness calculations during design. If the transmission screw also bears a large axial load, its strength needs to be additionally calculated. Long screws (slenderness ratio exceeding 40) that are not manually adjustable may produce lateral vibration; therefore, their critical speed needs to be checked. IV. Usage Precautions 1. Load Considerations: Additional radial loads should be avoided as much as possible, as such loads can easily cause screw malfunction, increased wear, and jamming. 2. Dust Prevention Requirements: Foreign objects must be prevented from entering the thread. If impurities such as iron filings, tin dross, and aluminum shavings are easily generated under operating conditions, a protective cover should be installed to prevent foreign objects from entering the thread and causing abnormal wear or jamming. 3. Slenderness ratio requirement: When the slenderness ratio exceeds a certain range (60 or above), the screw will bend due to its own weight, resulting in radial off-center load on the nut. Depending on the actual operating speed and torque, this may lead to abnormal wear, jamming, shaft end bending, or even breakage. To solve this problem, an anti-runout device can be installed in the middle of the screw for constraint. 4. During installation, attention should be paid to the coaxiality and levelness calibration of the fixed-support installation method; for the fixed-free cantilever structure, attention should be paid to the control of shaft end tolerances and the locking and reinforcement of the head. 5. When installing a trapezoidal thread screw, runout verification must be performed. If suitable measuring equipment is lacking, the screw can be moved by hand along its entire length once or multiple times before installing the driving component. If the force required to move the outer diameter of the shaft is uneven and accompanied by wear marks, it indicates that the lead screw, nut support, and guide rail are not aligned. In this case, first loosen the relevant mounting screws, and then move the lead screw by hand once. If the required force becomes uniform at this time, the corresponding components can be recalibrated. If the force is still uneven, the mounting screws need to be loosened again to determine the location of the calibration error.