2026-07-27

Low-Temperature Black Chromium Plating for Ball Screws: Process, Benefits, and Applications

  Low-Temperature Black Chromium Plating for Ball Screws: Process, Benefits, and Applications As ball screws are increasingly used in robotics, automation, medical devices, and semiconductor equipment, customers are placing higher demands on corrosion resistance, wear resistance, and product appearance. One surface treatment that has attracted growing attention is Low-Temperature Black Chromium Plating. Unlike conventional black oxide treatment, low-temperature black chromium plating provides...

2026-07-23

Single Nut vs. Double Nut Ball Screws: Which One Should You Choose?

  Single Nut vs. Double Nut Ball Screws: Which One Should You Choose? Ball screws are widely used in CNC machines, industrial automation, robotics, medical equipment, and precision positioning systems. One of the most common questions engineers face is whether to choose a single nut or a double nut ball screw. While both designs convert rotary motion into precise linear motion with high efficiency, they differ significantly in terms of backlash, rigidity, positioning accuracy, and cost. What Is...

2026-07-23

Brass vs. Bronze Nuts for Trapezoidal Lead Screws: Which Material Is Right for Your Application?

  Brass vs. Bronze Nuts for Trapezoidal Lead Screws: Which Material Is Right for Your Application? When selecting a trapezoidal lead screw, engineers often focus on the screw itself while overlooking one of the most critical components—the lead screw nut. The choice between Brass and Bronze can significantly affect load capacity, wear resistance, service life, and overall system performance. So, which material is the better choice? Brass Nuts Brass is a copper-zinc alloy widely used in general...

2026-05-15

Precision in Motion: The Strategic Role of Ball Screws in the Optical Communication Industry

  Precision in Motion: The Strategic Role of Ball Screws in the Optical Communication Industry Introduction As the global demand for high-speed data transmission escalates with the rise of 5G, AI, and hyperscale data centers, the optical communication industry is shifting toward unprecedented levels of integration. Technologies such as Silicon Photonics (SiPh) and 800G/1.6T optical modules require assembly and alignment accuracies at the sub-micron or even nanometer level. At the heart of the...

2025-12-03

The Core of Humanoid Robots: Ball Screws and Bearings

Amid the tide of modern technology, humanoid robots, as the perfect integration of artificial intelligence and mechanical engineering, are gradually stepping into our lives.   They not only play a vital role in fields such as industrial production lines, medical assistance, and disaster rescue, but also demonstrate boundless potential in industries like entertainment and education.   Behind all of this, there lies a component that seems unremarkable yet is of crucial importance — ball screws...

2025-12-03

Why Do “Musk and Others” Use Planetary Roller Screws?

Tesla’s Optimus Gen-2 robot uses 14 Swiss GSA inverted planetary roller screws—8 in the upper limbs and 6 in the lower limbs. Kepler’s K2 “Bumblebee” humanoid robot also adopts 12 self-developed planetary roller screw actuators paired with rotary actuators. It can last up to 8 hours on a single charge and lift 30 kg of weight with ease. Thanks to its proprietary core technology, the base version costs only $30,000.  In China, Unitree’s humanoid robots R1 and G1 use high-precision planetary...

2025-12-03

Why Are Planetary Roller Screws So Valuable?

As a crucial mechanical transmission element, a roller screw enables the conversion between linear and rotational motion through rolling contact between rollers, the screw shaft, and the nut. The principle of a planetary roller screw is similar to that of a planetary reducer. From a high-speed power source like a motor or engine to the working end of the device, there must be a process of deceleration and torque amplification—this is what the transmission mechanism achieves. Small rollers...

2025-09-22

Ball Screw in automative market

Driven by intelligent driving technology, the application and demand for ball screws in linear actuators within chassis systems are growing. The continuous progress of current intelligent driving technology places stricter requirements on vehicle chassis systems, especially in key application scenarios such as steer-by-wire, brake-by-wire, and active suspension. The market demand for linear actuators composed of motors, ball screws, and sensors is expected to grow significantly, specifically...

2025-09-22

Ball Screw Play Important Roles in Industrial Mother Machines and the Automotive Industry

Ball Screw in Industrial Mother Machines (Machine Tools) Development of high-end machine tools accelerates; guide rails and ball screw play important roles in industrial automation equipment. With the continuous advancement of industrial automation, the machine tool industry has risen to the core of national development strategy. In recent years, China has successively introduced multiple relevant policies to accelerate the development of high-end CNC machine tools, and the localization process...

2025-09-12

Miniature Ball Screws Used in Dexterous Hands May Further Expand Screw Demand

Miniature Ball Screws Used in Dexterous Hands May Further Expand Screw Demand Tesla's third-generation dexterous hand replaced the worm gear scheme with a planetary ball screw. The transmission device of a dexterous hand can generally be divided into three stages: (1) First stage: Located on the motor side, mainly consisting of harmonic/planetary reducers and belts, serving to control precision and enhance torque. (2) Second stage: Mainly uses ball screws or bevel gears, responsible for action...

2025-09-12

China Ball Screw Industry Special Report: The Core Linear Drive Component for Humanoid Robots part one

Ball Screw is Core Component of Humanoid Robots, Screw Market Faces Ten-Billion Incremental Opportunity The industrialization process of humanoid robots is accelerating, with ball screws being a core component. A ball screw typically consists of a screw, a nut, and a reversal device. Ball Screw working principle involves converting the rotary motion of the screw into the linear motion of the nut, thereby driving precise displacement movement. The reversal device primarily serves to change...

2025-02-10

Miniature ball screw and super huge ball screw

The ball screw is an essential mechanical component that plays a crucial role in various industries. Miniature and super huge ball screws, despite their size differences, both have significant applications and technical challenges.   The miniature ball screws are often used in precision instruments and small-scale devices where space is limited but high accuracy and smooth movement are required. Their design and manufacturing demand meticulous attention to detail to ensure optimal performance....

2024-03-26

The grinding of ball screw

Grinding: The ball screw and roller are mainly used in rolling or turning, and the nut needs to be ground in the finishing process, and the grinding process is more difficult. At present, overseas ball/planetary roller screws apply rolling or turning processes in low-precision fields (such as transmission) and grinding processes in high-precision fields (such as machine tools). In the field of humanoid robots, the lead screw and roller are mainly rolled or turned, while the nut is ground. The...

2024-03-21

The reverse planetary ball screw

The reverse planetary ball screw is suitable for compact scenarios, such as humanoid robots. 1) The reverse planetary roller screw has a longer nut and can achieve a greater load with less torque. The structure of the reverse planetary roller screw is similar to the standard type, but there is no inner tooth ring, both ends of the screw are processed with straight teeth meshing with the gears at both ends of the roller, the nut as an active part, the length is much larger than the standard...

2024-03-12

Tesla humanoid robot is expected to open the ball screw

Tesla humanoid robot is expected to open the ball screw, planetary roller screw application space. According to the Tesla AI Day2022 information, the lower legs of the Tesla humanoid robot will use frameless motors and linear actuators with planetary roller screws. Under the assumption that Tesla's single humanoid robot needs 4 ball screws +10 planetary roller screws, the global population is about 8.2 billion people, and the robot penetration rate is 12 units / 10,000 people, it is estimated...

2024-03-08

Ball Screw Processing method

Ball Screw Processing method: According to Zheng Hong's "Research on Precision ball screw Machining Process Regulations", the common methods of grinding ball screw processing are: grinding wheel, hard turning, cyclone milling. (1) Grinding wheel: the highest precision, for precision requirements of high finishing, low production efficiency. According to the different cross-section shape of the grinding wheel, there are two kinds of grinding with single line grinding wheel and multi-line...

2024-03-05

Ball Screw Heat Treatment

Ball Screw Heat treatment: According to Zheng Hong's "Research on Precision ball screw Machining process Regulations", GCr15 high-carbon chromium bearing steel is often used as ball screw material. Bearing steel has the advantages of high hardness, uniform organization, strong wear resistance and high contact fatigue strength after quenching and low temperature tempering, but bearing steel material is generally plastic, medium cutting performance, poor welding performance and temper...

2024-02-19

EPB Ball Screw

EPB ball screw is used for middle and high-end automobile electronic parking system. EPB ball screw structure is different from the conventional ball screw, the special structure ensures that it has a stronger bearing capacity, in the electronic braking process, the caliper motor through the screw spline to drive the screw rotation, the screw master axis movement provides braking force for the parking system. EPB ball screw is the core transmission component of the electronic parking system,...

2024-02-05

Ball Screw for EPB brake solution

At present, EPB brake calipers in the market mainly use two transmission modes, one is screw drive, the other is ball screw rotation; Both of these are spiral rotation, composed of a screw and a nut, which transmits motion and power through the rotation of a screw and a nut. It is mainly to turn the rotational motion into a straight line motion, with a small torque to get a large thrust. Compared with the traditional screw drive, the EPB with ball screw has the advantages of high efficiency,...

2024-02-02

Automotive Electronic Ball Screw

According to the "Research on Parking Force of Automotive Electronic Parking Brake System (EPB)", EPB drive components include electric motor, deceleration mechanism and parking brake. According to the "Research on Parking Force of Automotive Electronic Parking Brake System (EPB)", EPB drive components include electric motor, deceleration mechanism and parking brake. When the driver presses the button of the electronic parking brake system, the electronic parking brake system control module...

2024-01-29

Ball screw Benefit from the increase of intelligent penetration of automobiles

Ball screw: Benefit from the increase of intelligent penetration of automobiles, the value of bicycles is thousands. At present, EPS is the mainstream, of which R-EPS uses ball screw. The steering system is currently EPS as the mainstream. The development of the steering system has experienced multiple stages such as mechanical steering system, hydraulic power steering system (HPS), electric power steering system (EPS), electronic hydraulic power steering system (EHPS), and drive-by-wire...

2024-01-28

Ball Screw electric power steering system

The electric power steering system can be roughly divided into six types according to the different positions of the motor and the differences in the deceleration mechanism: Tubular electric power steering system (C-EPS), single pinion electric power steering system (P-EPS), double pinion electric power steering system (DP-EPS), rack electric power steering system (R-EPS), wire electric power steering system and wheel-side electric power steering system. Among them, C-EPS, DP-EPS and R-EPS are...

2024-01-23

Automobile intelligence Ball Screw application part two

At present, the market is basically occupied by foreign enterprises, and the main difficulty of domestic replacement is the purchase of finishing technology and grinding equipment. The field of ball screws for automobiles has opened domestic replacement, faster than the field of robots. The lead screw accuracy level requirements are sorted from high to the end: machine tools, robots, and automobiles. Automotive field: Wuzhou New Spring, New sword transmission, Ningbo Cixing, Changsheng bearing,...

2024-01-22

Ball Screw Repositioning Accuracy

The repositioning accuracy of a ball screw depends on several factors such as the lead accuracy, nut accuracy, preload, and mounting accuracy. Generally, ball screws have high repositioning accuracy and can achieve repeatability of up to ±0.005 mm or better. However, the actual accuracy may vary depending on the specific application and operating conditions. It is important to consider factors such as thermal expansion, vibration, and lubrication when determining the repositioning accuracy of a...