The development, therefore, represents an environmentally sustainable choice for any European manufacturer looking to reduce carbon dioxide (CO2) emissions.
NSK is increasing its use of bioplastics, which are said to be more effective in reducing carbon emissions than conventional fossil fuel-based plastics. Ball screws are a key focus area due to their popularity in all kinds of industrial machines and systems.
According to NSK, ball screws are efficient at transmitting force and converting motion (from rotational to linear), delivering energy savings. In recent years, injection moulding machines and servo presses are among many machine types switching from hydraulic to electric drive systems using servomotors and ball screws as a means of reducing power consumption. Considering such industry trends, the demand for ball screws is set for ongoing growth, particularly if sustainable solutions are available.
NSK’s development of its S1 bioplastic retaining piece for ball screws (50 to 200mm diameter) makes a contribution to achieving carbon neutrality. NSK selected and validated DSM's EcoPaXX bioplastic (a plant-derived high-performance polyamide) as the retention piece material. Retaining pieces sit between the balls to prevent them from colliding with each other and causing damage.
To optimise the development process, NSK deployed its digital twin technology. This process enabled the creation of a bioplastic retaining piece with the same performance as a conventional product in a short period of time through the simulation of key parameters such as dimensions, shape, deformation and strength.