NSK has developed HTF-SRM Ball Screws, a high-speed, heat-resistant version of its high-load drive ball screws, ideal for high-cycle, thin-wall molding in electric injection molding machines.

NSK is exhibiting this product at the IPF Japan 2024 International Plastics Fair and plans to begin accepting orders in April 2024, with a global rollout to follow. NSK aims to achieve annual sales of 500 million yen by fiscal 2026 for this product.

The newly developed SRM (Smooth Return Metal coupling) recirculation system and heat-resistant components achieve the industry's highest level of operating speed and heat resistance. The permissible d-n value1 is 200,000, a 40 percent improvement over NSK's conventional high-speed HTF-SRC ball screws. The maximum operating temperature is 90°C and momentary maximum temperature is 100°C, both of which are 20°C higher than NSK's conventional products.

The external dimensions of the screw and nut are the same as those of the HTF-SRC model, eliminating the need for design changes when upgrading.