Heavy-duty ball screws
Movement in large machines
Thomson Industries has launched a ball screw that has more than twice the load rating of a standard ball screw.
The newly developed models offer either more than double the load rating or ten times the running performance compared to conventional ball screws with identical performance points. Heavy-duty ball screws are the ideal solution for demanding axis control applications, for example in injection molding systems, printing presses and large processing machines.
Double the load rating
"By increasing the ball diameter and optimizing the ball tracks, we can now offer a ball screw that has more than double the load rating of a comparable standard ball screw. And since roller screws firstly require a nut that is almost 50 percent larger and secondly cost 150 percent of a high-load ball screw, drive system designers now have an attractive opportunity to reduce costs and increase performance at the same time," explains Markus Brändle, Thomson Product Line Specialist, EMEA & Asia, for lead screws.
Replacement and maintenance costs for Thomson heavy duty ball screws are also significantly reduced. This creates a favorable opportunity to replace roller screws or hydraulic systems wherever axes are required for accurate and safe movement of heavy loads that also need to ensure long-lasting reliability and minimal maintenance. These applications include:
High loads, high precision, short strokes
Large processing machines, such as milling machines, water jet milling machines, plasma cutters and automatic welding machines, where movements must be controlled on horizontal and vertical axes. Injection molding systems and metalworking machines where ball screws move high loads with great precision in short strokes. Metal pressing and forming, including riveting presses, servo presses, tube and sheet metal bending machines, test benches and straightening machines. A variety of other demanding applications, such as machine tools, lifting devices, large valves and high-load actuators.
Thomson heavy-duty ball screws are available with a maximum spindle length of 15 meters and with either single or double nuts. The standard sizes range up to 160 millimeters in diameter and up to a dynamic load rating of 1,440 kilonewtons. Pre-tensioned versions are available on request, as are special versions adapted to customer-specific applications by Thomson engineers. Their main advantage: shock-free movements with low noise levels over a longer service life. The pitch accuracy is up to twelve micrometres over 300 millimetres. pb
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