The increase in the diameter of the ball screw enables longer strokes and achieves high speed and high acceleration! Extended lifespan due to improved specifications.
The THK electric actuator Compact Series KSF (featuring a large-diameter ball screw) is an LM guide actuator based on the KR model. By increasing the diameter of the ball screw, it achieves a long stroke of up to 1500mm while maintaining the same size as conventional products, enabling a maximum speed of 2500mm/s and a maximum acceleration/deceleration of 4G, which improves productivity by approximately 40% through reduced cycle times. Additionally, with a long lifespan of 20,000km, it enhances operational efficiency and reduces the inventory of spare parts. Due to its high speed and long stroke features, it has been adopted for the automation of workpiece packing tasks previously performed by operators, resulting in reduced labor costs and shorter packing cycle times. It is also used in the nozzle operation part of sealing devices, where suppressing the vibrations of the nozzle tip with a large overhang has improved productivity. Furthermore, the related links provide more detailed product descriptions, product catalogs, operation manuals, 2D and 3D CAD files, selection materials, and a wealth of technical information. Please take a look at these as well.
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1. Compact Structure Compared to our actuators using motors with the same rated output, the KSF8 and USW16T achieve approximately 67% compactness and about 37% weight reduction. *KSF8: For a stroke of 1500mm 2. Usable in Any Orientation The arrangement of each ball row at a contact angle of 45° ensures that the load remains constant in four directions (radial, reverse radial, and lateral) acting on the inner block, allowing for use in any orientation. 3. Moment-Resistant Outer Rail Structure The adoption of an outer rail with a U-shaped cross-section allows for the accommodation of large moments. 4. High Speed and High Acceleration By increasing the lead of the ball screw, a maximum speed of 2500mm/s is achieved. (*For KSF10 with a lead of 50) Additionally, by using larger applicable motors, high acceleration and deceleration transport is made possible (up to 4G). The tact time is reduced to 0.54 seconds for one round trip (500mm stroke). This results in a tact time reduction of 54 seconds for 100 round trips, improving productivity by approximately 40%. *Maximum acceleration and deceleration may vary depending on model number and specifications. 5. Long Stroke By increasing the diameter of the ball screw shaft, long strokes are achieved.
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6. Increase in motor rated output by enlarging the ball screw diameter The ball screw shaft has been enlarged while maintaining a compact outer rail. By also increasing the size of the ball screw terminal, it has become possible to use motors with higher rated output compared to actuators of the same size from our company. 7. Long lifespan By increasing the basic dynamic rated load of the LM guide and ball screw sections, we have achieved a long lifespan of 20,000 km when carrying the maximum payload (10,000 km for KSF4 and KSF5 with a lead of 10 mm). 8. Long-term maintenance-free By standardizing the lubrication device QZ, which enables the appropriate amount of lubrication oil supply, we have achieved long-term maintenance-free operation. 9. High precision The linear motion guide is designed with a circular arc groove that moves lightly without gaps. Therefore, it easily follows high-precision feeding. 10. Reduction of dust generation By adopting a strip seal with a side cover and a magnetic adhesion method on the top surface, we have realized a full cover structure. This prevents damage caused by the intrusion of foreign objects from the outside. The top surface of the strip seal has no contact, making it difficult to generate dust.
Company information
THK pioneered the "rolling" of linear motion components in machines in 1972 and developed the "linear motion system." The development of this "linear motion system" has led to increased precision, speed, labor-saving, and improved efficiency in machinery, enabling energy-efficient equipment design. All of THK's technology is focused on providing greater lightness and precision to the "movement" of various mechanisms, bringing numerous innovations to the world. 【THK's Main Product Areas】 1. Mechanical Component Parts: - Development, manufacturing, and sales of LM guides, ball splines, ball screws, electric actuators, etc. 2. Mechatronics Related Products: - Precision XY stages, linear motor actuators, etc. 3. Automotive Parts: - Link balls, rod ends, etc. 4. Robotics: - Pick and place robots "PPR," transport robots "SIGNAS," service robots "SEED-Solutions" (including display robots and temperature measurement robots), etc. 5. Seismic Isolation: - Seismic isolation tables TSD, seismic isolation modules TGS.