How Ball Screw Nuts Work?

The understanding of ball screw nut

Ball screws are ideal products for converting rotary motion into linear motion, or converting linear motion into rotary motion. It is the most commonly used transmission element in linear motion devices tool machinery and precision machinery. Its main function is to convert rotary motion into linear motion. Due to its small frictional resistance, ball screws are widely used in various industrial equipment and precision instruments. Ball screws are up to 90% efficient when used with a motor. They are fairly accurate, within a few thousandths of an inch per foot. Linear ball screw is used for precise control in many industries, including aerospace, computer, electronics, automotive and medical industries.

The ball screw is composed of a ball nut, a screw, a steel ball, a pre-press, a reverser, and a dust filter. Its function is to convert rotary motion into linear motion, and to change the bearing from sliding action to rolling action. Ball screw nut assembly is metal, usually steel, and consist of an internally threaded nut and a threaded rod with the helical groove of the ball screw nut matching the helical groove of the threaded rod. Inside the groove, contained within the ball screw nut are a number of small balls made of chrome steel. As the balls circulate through the nut, the balls provide smooth motion under the threaded rod, and a deflector or return system holds the balls and circulates them through the nut.

Understand the working principle of ball screw nut

The working principle of the ball screw nut is to convert the original sliding friction into rolling friction by the rolling of the balls, so the friction coefficient is greatly reduced, thereby improving the transmission efficiency. Its balls circulate through special holes.

A helical channel is formed, and the raceway is filled with balls. When the screw rotates relative to the luo, there is an axial displacement between the two, and the balls can flow along the raceway to reduce frictional resistance. After rolling through several turns, through the return guide device, roll back between the screw and the nut one by one, forming a closed loop pipe.

The ball screw nut is a high-precision transmission. It adopts rolling friction screw instead of sliding friction screw, which has the advantages of small wear, high transmission efficiency, stable transmission, long life, high precision and low temperature rise. Because the ball screw nut has outstanding advantages such as low motion friction and easy elimination of transmission clearance, it brings huge benefits to the performance improvement of mechatronics systems.

How does a ball screw work

A ball screw is a precision mechanical component that converts rotational motion into linear motion with high efficiency and accuracy. VXO Linear Motion Manufacturer is a leading company that specializes in producing ball screws for various industrial applications. Here is the ball screw working principle.

At the heart of the ball screw is a threaded shaft, also known as the screw, and a nut with matching helical grooves. What sets the ball screw apart is the use of ball bearings, which roll between the screw and nut's grooves, reducing friction and enhancing smooth movement. This innovative design ensures minimal energy loss and enables the ball screw to transmit higher loads and maintain precise positioning.

When the screw is rotated, the ball bearings inside the nut move along the helical grooves, causing the nut to move linearly along the screw's axis. This transformation of motion is crucial in applications where precision and efficiency are paramount, such as CNC machines, robotics, aerospace equipment, and medical devices.

VXO Linear Motion Manufacturer excels in producing ball screws with tight tolerances, impeccable surface finishes, and high load-carrying capacities. Their commitment to engineering excellence and rigorous quality control makes them a trusted choice for industries seeking reliable and accurate linear motion solutions.