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Ball screws are mechanical linear actuators that consist of a linear ball screw and ball screw nut that contain a ball that rolls between their matching helical grooves. The primary function of ball screws is to convert rotational motion to linear motion. Ball screw nut are used in transmitting forces to a stationary or dynamic load with high accuracy, precision, and repeatability.
The unique element of ball screws is the rolling balls in the helical groove which reduces the mechanical contact inside the linear ball screw assembly and replaces sliding friction with rolling friction. This mechanism significantly lessens the friction generated, which results in highly efficient power conversion. The efficiency of screws is measured by their capability to transform power utilized in exerting rotational force to the linear distance covered.
The main components of ball screws are the linear ball screw, ball screw nut, and the balls. We will discuss their important specifications and their impact on the operation.
Ball screws may be categorized according to the mechanism of their ball recirculation. The ball recirculation mechanisms are grouped into internal recirculation and external recirculation systems.Internal Ball Recirculation, Deflector-Type Ball Screws, End Cap-Type Ball Screws, External Ball Recirculation.
We have different types of ball screws, we have rolled screws and ground screws, the precision of ground screw can reach to C3, the rolled screw can reach to C5.
A ball screw works in a similar way to a conventional lead screw, but the significant advantage of using a ball screw is that it uses balls running in the helical channel to transmit the load. In high precision applications it is often necessary to translate the rotary motion from a motor to linear motion for the payload. One way of achieving this is by using a linear ball screw.Ball bearings within a ball screw roll along the track in a similar way to ball bearings in a standard rotary ball race, therefore eliminating the sliding friction associated with linear ball screws. The ball bearings are continually recirculated through the ball screw nut, distributing the load and picking up lubrication along the way. Due to the use of rolling ball bearings within a ball screw, the internal friction is very low, meaning ball screws can offer a high level of efficiency and positional accuracy even at high torque and force loadings. Ball screws can be quite complicated and high-precision devices, meaning they can sometimes be slightly more costly compared to a typical lead screw. This is due to the complex machining and assembly techniques required to manufacture them. However, if your application requires a ball screw, the greater performance generally outweighs the cost.
There are many advantages of using ball screws within your motion application:
There are many factors that could lead to premature failure of a ball screw or ball nut. Several of the most common are listed below
Due to the small frictional resistance, ball screw are widely used in a variety of industrial equipment and precision instruments. Ball screws are used for heavy-duty applications requiring high speed, high throughput, high accuracy, and long service times. They are used in precise positioning systems, in automotive steering systems, in electric vehicles, in energy-generating machinery such as wind turbines, solar panels, and hydroelectric equipment, in aircraft machinery, and as a viewing system for the photolithography process.
LIMON is the leading supplier of linear components. In order to meet customer’s demands, we are always keeping the pace of making innovations and developing new products and technical reformation. LIMON involved in ball screw industry from 2007 and with professional technical and sales team, now we sell very well and has dealers in European, Asian and South American countries. Feel free to contact us, if there is any question.