The concept and design of ball screws can be traced back to the late 19th and early 20th centuries. During the industrial revolution, with the development of the machinery industry, people's demand for linear motion became more and more urgent. Previously, a combination of a screw and nut was commonly used to achieve linear motion, but friction and imprecise properties limited the accuracy and efficiency of the system. In this context, the ball screw was proposed and developed. Ball screws utilize the rolling relationship between the balls and the screw, resulting in low friction and precise linear motion. In the design of the ball screw, the balls are arranged on the threaded track of the screw. When the screw rotates, the balls roll on the track, converting the rotary motion into linear motion. The introduction of the ball screw has greatly improved the performance of the linear transmission system, increasing the efficiency, stiffness and precision of the transmission. They are widely used in various fields, such as machine tools, robots, automated production equipment, stage lighting systems, printing machinery, etc., providing these systems with high precision, high speed and reliable linear motion. With the continuous advancement of science and technology and manufacturing technology, the design and manufacture of ball screw are also continuously improved and optimized. Modern ball screws have achieved higher load capacity, longer service life, higher stiffness and better reliability. They have become essential key elements in many mechanical systems, providing important support for industrial automation and production.

The miniature ball screw is a transmission device with high precision and high stability, which has the following characteristics: 1.High precision: The miniature ball screw adopts the form of contact between the ball and the thread, so that its axial clearance is small, the transmission precision is high, and it can realize high-precision positioning and translational movement. 2.High stability: The balls of the miniature ball screw are in contact with the thread, and the friction coefficient is small, which can realize smooth movement, thereby reducing mechanical vibration and noise. 3.Long life: The friction surface of the miniature ball screw is made of high-strength material, which can withstand high stress and high load, and its few moving parts and low wear rate, so it has a long service life. 4.High transmission efficiency: The miniature ball screw has high transmission efficiency and can realize high-precision movement under high-speed and high-load conditions. 5.Easy maintenance and replacement: The micro ball screw has a perfect lubrication system, which can ensure its stable operation for a long time, and it is also easy to maintain and replace if there is a problem.

We have extremely high standards and strict rules and regulations when making ball screw. The following are the points we need to pay attention to during the production of ball screws. The positioning system of machine tools is usually driven by ball screws, which have high stiffness and low sensitivity to external disturbances. However, as modern machine tools increase positioning speed and acceleration, the resonant modes of these systems may be excited, thereby reducing trajectory tracking accuracy. Therefore, machine design and controller selection and adjustment require a dynamic model that includes vibration modes. The basic function of the ball screw feed driver is to convert the rotational motion of the servo motor into linear reciprocating motion of the platform. The ball screw feed drive device used in CNC machine tools is modular and integrated with high-performance mechanical components such as roller/ball linear guide rails, pre tensioned ball screw pairs, screw shafts, bearing support units, bolt joints, couplings, etc. The ball screw feed driver needs to transmit load and motion to the spindle, tool holder, or workpiece with high positioning accuracy and low friction. The platform is generally supported by four carriages and two guide rails to ensure sufficient stiffness. The nut and platform are installed together through flange ends and bolts. The screw shaft passes through the nut cavity, and its two ends are supported by bearing support units. The bearing support unit is fixed to the base by bolts and consists of a ball bearing, housing, cover, and locking nut.

Below, I will introduce the difference between KK module and ordinary screw module. 1. Positioning accuracy: The positioning accuracy of KK module is higher than that of ordinary screw module, which can reach the 0.01mm level, while the positioning accuracy of ordinary screw module can only reach the 0.1mm level. 2. Friction: The friction force of the KK module is smaller than that of the ordinary screw module, so it is smoother and less noisy during use. 3. Rigidity: KK modules have higher rigidity than ordinary screw modules and can withstand larger loads. 4. Load capacity: The KK module has a stronger load capacity than ordinary screw modules and can withstand larger loads. 5. Update speed: The update speed of KK module is faster than that of ordinary screw module, making it more suitable for modern production needs.

Ball screw is a common mechanical transmission element widely used in industry, mechanical equipment and automation systems. Choosing the right ball screw is a key factor in ensuring efficient operation and long-term use of mechanical equipment. Here are a few key points to consider when selecting a ball screw: 1. Load capacity: The load capacity of the ball screw is one of the key factors in selection. The maximum axial and radial loads required need to be determined to ensure that the ball screw can withstand the working load and maintain stable operation. 2. Accuracy requirements: Select the appropriate ball screw accuracy grade according to the accuracy requirements of the application. There are usually different accuracy levels such as C0, C3, and C5 to choose from. The higher the accuracy level, the higher the transmission accuracy. 3. Movement speed: Consider the maximum linear speed required by the ball screw to determine whether the selected ball screw can meet the movement speed requirements. Higher movement speeds may require the use of preload structures to reduce vibration and heat in the ball screw. 4. Lifetime requirements: Determine the required service life and reliability requirements. According to the rated life and selection life factors of the ball screw, consider the service life, maintenance cycle and reliability requirements, and select the appropriate product. 5. Installation space and dimensions: Consider the available installation space and the external dimensions of the ball screw. Make sure the ball screw you choose is suitable for the installation needs of your existing equipment or system. 6. Environmental conditions: Consider the special conditions of the use environment, such as temperature, humidity, corrosive media, etc. Choose a ball screw with high temperature resistance, corrosion resistance or good sealing performance to ensure reliable operation in harsh environments. 7. Lubrication method: Determine the lubrication method of the ball screw. You can choose grease lubrication or oil lubrication, choose the corresponding lubrication method according to different applications, and perform regular lubrication maintenance. In short, choosing a suitable ball screw requires comprehensive consideration of the requirements of mechanical equipment, application environment, reliability requirements and economic factors. Communicate with suppliers or professional engineers and refer to the technical parameters and performance indicators provided by the ball screw manufacturer to ensure the best ball screw product is selected.

Some customers may ask, what type of ball screw can the nut and screw be separated from and can be screwed on during use? In fact, there is no such ball screw, because after the nut and screw are separated, the balls fall out and the screw can no longer be used. However, a trapezoidal screw is okay, because there are no balls, and the nut can be unscrewed and then screwed back on without any impact. There is also a screw that is more precise than the ball screw, which is the planetary ball screw. The planetary roller screw is a mechanism that converts rotational motion into linear motion. The rolling element between the nut and the screw is a threaded roller. The numerous contact lines make the planetary roller screw have a very strong load-bearing capacity. Planetary roller screws are classified into: roller non-circulating type (RGT series and RGTB series), roller circulating type (RGTR series). A planetary roller screw is a mechanical device that converts rotational motion into linear motion. The planetary roller screw transmission method is unique. Around the main threaded screw, 6-12 threaded roller screws are arranged on the planet, which converts the rotational motion of the motor into the linear motion of the screw cup or nut. Planetary screws can withstand heavy loads for thousands of man-hours in extremely harsh environments, making planetary screws an ideal choice for applications requiring continuous duty. A planetary roller screw is a rolling system that includes a threaded screw and a number of nuts with rollers at both ends. The rollers run in orbit driven by synchronized gears at both ends of the nut. Compared with ball screw red, it has higher load-bearing capacity and accuracy, but the cost is expensive, 2-10 times that of ball screw. Generally, enterprises will not choose or need to use this kind of roller screw, while planetary ball screw Screws are usually used in high-precision industries. ​

The life of a ball screw can vary depending on various factors such as the quality of the ball screw, operating conditions, maintenance, and the specific application it is used in. Generally, ball screws are designed to provide a long service life, and their durability is one of the reasons they are preferred in many industrial applications. The life of a ball screw is typically expressed in terms of the number of revolutions or distance traveled before it reaches a specific level of wear or failure. Manufacturers often provide specifications for their ball screws, including the expected service life under given conditions. The service life of a ball screw can be affected by factors such as the load applied, rotational speed, operating temperature, contamination, lubrication, and maintenance practices. Higher loads, faster speeds, harsh operating conditions, inadequate lubrication, and lack of proper maintenance can all contribute to a reduced service life. To maximize the life of a ball screw, it is important to follow the manufacturer's guidelines for proper installation, lubrication, and maintenance. Regular inspection, cleaning, and lubrication can help prevent premature wear and extend the useful life of the ball screw.

Ball screws can be relatively expensive due to several reasons: 1. Precision Manufacturing: Ball screws require high precision manufacturing processes to achieve tight tolerances and smooth operation. The manufacturing process involves grinding the screw thread and the matching ball nut to ensure optimal fit and minimal backlash. This precision manufacturing adds to the overall cost. 2. Quality Materials: Ball screws are typically made from high-quality materials such as hardened steel for the screw and a nut made from materials like bronze or steel. The selection of these materials ensures durability, corrosion resistance, and long operational life, but they can be costly. 3. Complex Design: The design of ball screws involves a complex configuration with multiple components such as balls, circulation systems, and seals. The precise engineering and fitting of these components to minimize friction, increase efficiency, and reduce wear contribute to the higher cost. 4. Performance and Efficiency: Ball screws offer advantages over other types of screws in terms of performance, such as high load capacity, accuracy, and minimal backlash. Achieving these performance characteristics requires high-quality materials and precision manufacturing, which can drive up the cost. 5. Specialized Applications: Ball screws are commonly used in applications that require precise linear motion, such as CNC machines, servo systems, robotics, and aerospace equipment. The specialized nature of these applications often demands stringent requirements, leading to higher costs. While ball screws may seem expensive compared to other screw types, their performance, accuracy, and durability make them valuable in many industrial and high-precision applications.

Communicating and learning with foreign customers is an exciting and challenging process that can help you expand your cross-cultural communication skills, understand international business etiquette, and improve your communication skills. Here are some suggestions to help you better communicate and learn from foreign customers: 1. Learn the other party’s culture: Understand the other party’s country’s history, values, social customs and business environment. This can help you better understand their background and behavior, avoid culture clashes, and build a better trusting relationship. 2. Prepare in advance: Make sure to make adequate preparations before communicating with foreign customers. Understand their business, products and services, as well as the challenges and needs they may face. This will allow you to communicate more purposefully and demonstrate your concern and expertise for them. 3. Learn their language: Try to learn something of the other person’s language, even if it’s just some basic greetings and common expressions. Not only does this help you understand the other person better, it also shows that you respect and are willing to put in the effort to communicate effectively with them. 4. Pay attention to language and cultural differences: When communicating with foreign customers, pay attention to language and cultural differences. Language can be misunderstood, so you should try to use concise and clear expressions and avoid using slang or jargon that is difficult to understand. Additionally, pay attention to nonverbal communication styles in different cultures, such as eye contact, body language, and the meaning of gestures. 5. Active listening and asking questions: Actively listen to the other person’s views and needs, and ask targeted questions. This demonstrates your interest and concern and ensures you understand the other person correctly. Avoid expressing opinions too directly or dogmatically, and respect and accept different views and opinions. 6. Adapt to time zone differences: If you and your foreign clients are in different time zones, be sure to arrange meeting times reasonably. Try to find a time that is convenient for both parties, and be sure to inform the other party of the meeting arrangements in advance. 7. Use appropriate technology tools: Use appropriate technology tools to communicate remotely, such as conference calls, video conferencing, or online collaboration platforms. Make sure you are familiar with the tool you are using and test its stability and reliability during communications. 8. Respect business etiquette: Understand the business etiquette of the other country and try to abide by it. This shows your respect and value for your partner, while also helping to build a good business relationship. 9. Pay attention to cross-cultural communication skills: Actively seek and learn cross-cultural communication skills and strategies. Learn how to deal with conflicts and misunderstandings in different cultural contexts, and how to build cooperative and win-win relationships. 10. Continuous learning and improvement: Communication and learning with foreign customers is a process of continuous development and improvement. Continuously learn and improve your communication skills and cross-cultural cooperation capabilities by reflecting on and summarizing experiences.

The load capacity of a ball screw depends on several factors, including the size, shape, material, and design and manufacturing quality of the ball screw. Generally, the load capacity of a ball screw is given in the technical specifications and parameter tables provided by the manufacturer. These specification tables usually list the rated load capacity, maximum load capacity, rated speed, and rated service life of the ball screw. The rated load capacity refers to the recommended load of the ball screw under the design calibration conditions, while the maximum load capacity refers to the maximum load that the ball screw can withstand, but may reduce the life of the ball screw or cause other side effects. The load capacity of a ball screw is also affected by the operating environment and usage conditions. For example, the load capacity of a ball screw may be reduced in a high temperature environment. Therefore, when selecting and using a ball screw, factors such as load type, direction, speed, acceleration, and operating temperature need to be considered. In summary, to determine the load capacity of a ball screw, it is best to refer to the specification table provided by the manufacturer and ensure that it is selected and used according to the actual application conditions.

Trapezoidal screw: Pure sliding friction - brass (good self-lubrication) has a very low efficiency of 60%, a simple structure, low cost and no precision, large surface contact load, large starting resistance, resulting in creeping and creeping during ultra-low speed operation. Trapezoidal screws can be selected when there is no precision requirement, a large axial load is required, the budget is low and the cost needs to be reduced, the speed is low, and the occasion is not important. Ball screw: It realizes high-efficiency and low-friction transmission through rolling media, with an efficiency of more than 90%. Compared with surface contact, ball is point contact, with smaller load, higher precision and higher cost. The speed of the screw is limited, and it is best to control it within 1500rpm. If the screw is too long, it needs to be pressed down to within 1000rpm. Unit movement of the screw: lead (pitch, Pb) [Fixed seat]: Angular contact bearings are used in pairs to constrain the axial direction of the screw and are mainly used to bear the axial force of the screw [Support seat]: Deep groove ball bearings are used alone, purely to support the tail of the screw, so that it does not run around and can slide axially [Fixed + Support]: The most classic structure [Fixed + Free]: There is no way to put it, there is no place to install the support seat (short stroke, structural requirements), the speed cannot be too high, and the load should not be too large [Fixed + Fixed]: Not suitable for high-speed operation, heating will cause the screw to deform and get stuck, very good rigidity, high precision [Support + Support]: No precision, loose mechanism, small load, almost no requirements for motion performance---hand-cranked adjustment mechanism Nut structure of ball screw [External circulation]: Better high-speed performance, complex structure, higher cost [Internal circulation]: Slightly lower cost, more compact structure, easy to install Ball Screw precision C0 C1 .......C7 C10 ... The larger the number, the worse the accuracy and the lower the cost The screw rods of C7 and later are processed by extrusion molding --- rolled screw rods: high production efficiency----cheap, short delivery time The screw rods of C5 and earlier are processed by whirlwind milling + grinding --- ground screw rods: low production efficiency---very expensive, high accuracy The most used: C7 Ball Screw Preload Effectively prevent the nut seat from offsetting due to clearance when the load is large (improve the dynamic accuracy of large loads) Increases internal stress, greater resistance, and increased heat generation

Preload adjustment of ball screws is a key step to ensure their high precision, high rigidity and long life. The role of preload is to eliminate the gap between the ball and the raceway, reduce the reverse clearance (backlash), and improve the axial rigidity and vibration resistance of the system. However, excessive preload may cause heating, increased wear and even jamming, so the adjustment must strictly follow the technical specifications. The following are the detailed methods and precautions for preload adjustment: 1. Purpose of preload adjustment Eliminate axial clearance: Ensure that the screw has no empty stroke when moving forward and backward. Improve rigidity: Enhance the system's ability to resist deformation due to load changes. Extend life: Reasonable preload can evenly load the ball and avoid local wear. Reduce vibration and noise: Reduce impact and abnormal noise caused by clearance. 2. Main methods of preload adjustment a. Double nut preload method (most common) Principle: Apply opposite axial forces through two nuts to squeeze the ball into contact with the raceway. Steps: Install double nuts: Install two ball nuts in reverse on the same screw shaft. Apply preload: rotate the two nuts to bring them closer together, compress the elastic element in the middle (such as a disc spring) or directly lock them through the thread. Adjustment method: Torque control method: tighten the nut to the specified torque value with a torque wrench (refer to the manufacturer's data). Displacement control method: measure the distance between the two nuts and adjust to the preset compression amount (usually 1%~3% of the lead). Lock the nut: use a locking washer or thread glue to fix the adjusted position. b. Shim adjustment method Applicable scenarios: single nut structure or occasions where the preload needs to be accurately adjusted. Steps: Add a shim between the nut end face and the mounting seat. Change the axial relative position of the nut and the screw by increasing or decreasing the thickness of the shim, and compress the ball and raceway. The preload needs to be tested repeatedly until the target value is reached. c. Spacer adjustment method Principle: add a spacer (sleeve) of a specific length between the double nuts, and control the preload by changing the length of the spacer. Advantages: High preload accuracy, suitable for equipment with high rigidity requirements (such as CNC machine tools). Steps: Measure the original spacing between the two nuts. Calculate the required spacer length based on the preload amount (usually the required compression amount = spacer length - original spacing). Install the spacer and lock the nut. d. Variable lead method (preload type ball screw) Principle: The manufacturer changes the lead of the ball circulation path to make the ball preload in the nut. Features: Users do not need to adjust, and can obtain standard preload by direct installation (need to select according to the load). 3. Key parameters for preload adjustment Preload level: usually divided into light preload (C0/C1), medium preload (C2/C3), heavy preload (C5), which needs to be selected according to the load and accuracy requirements. Preload amount calculation: Preload amount ≈ 0.05~0.1 times the elastic deformation corresponding to the rated dynamic load. Empirical formula: preload = (5%~10%) × lead (refer to the manufacturer's manual). Preload detection indicators: Axial rigidity: The displacement after applying external force must be less than the allowable value (such as 1μm/N). Reverse clearance: measured with a micrometer, the target value is usually ≤5μm. IV. Detection and verification after adjustment Torque test: Manually rotate the screw to feel whether the resistance is uniform and avoid local jamming. Use a torque meter to measure the driving torque and compare it with the manufacturer's recommended range (re-adjustment is required if it exceeds the limit). Reverse clearance detection: Fix the micrometer contact to the nut, move the screw in the forward and reverse directions, and record the displacement difference. Temperature monitoring: Run without load for 30 minutes to check whether the temperature rise is normal (generally ≤40℃). V. Precautions Avoid over-preloading: Excessive preloading will cause a sharp increase in friction heat, accelerated wear and even sintering. Lubrication management: After preload adjustment, it is necessary to add an appropriate amount of grease. It is recommended to use high-speed and high-load lubricants. Environmental adaptability: The preload amount needs to be re-checked in high or low temperature environments (affected by the thermal expansion coefficient of the material). Regular maintenance: Check the preload status every 300-500 hours of operation and readjust it if necessary. VI. Common problems and solutions Problem 1: Large running resistance after preload adjustment Cause: Excessive preload or insufficient lubrication. Solution: Reduce the thickness of the gasket or the length of the spacer sleeve and increase lubrication. Problem 2: The reverse clearance still exceeds the standard Cause: The nut is worn or the screw shaft is bent. Solution: Replace the nut, straighten the screw or replace a new screw. Problem 3: Abnormal noise and vibration Cause: Uneven preload or broken balls. Solution: Readjust the preload and check the ball circulation system. Through the above understanding of ball screw preload, if you want to learn more, please contact us, we are online 24 hours a day to serve you.