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 (which uses 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, allowing for a maximum speed of 2500mm/s and a maximum acceleration/deceleration of 4G, resulting in a productivity increase of about 40% due to reduced cycle times. Additionally, with a long lifespan of 20,000km, it improves operational rates and reduces the need for spare parts inventory. Due to its high speed and long stroke features, it has been adopted for the automation of workpiece packing operations that were previously performed by workers, leading to reduced labor costs and shorter packing cycle times. It is also used in the nozzle operation 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, user manuals, 2D and 3D CAD files, selection materials, and a wealth of technical information. Please take a look at those 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: In the case of a stroke of 1500mm 2. Usable in Any Orientation Each ball row is arranged at a contact angle of 45° to ensure the same rated load against loads acting on the inner block from four directions (radial, reverse radial, and lateral), allowing 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 reception 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. (*In the case of 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%. *The maximum acceleration and deceleration may vary depending on the 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. Increased 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 (for KSF4 and KSF5 with a lead of 10 mm, the lifespan is 10,000 km). 8. Long-term maintenance-free By standardizing the lubrication device QZ, which enables the appropriate amount of lubricant supply, we have achieved long-term maintenance-free operation. 9. High precision The linear motion guide features a circular arc groove that moves lightly without gaps. Therefore, it easily follows high-precision feeding. 10. Achieved reduction in dust generation By adopting a strip seal with a side cover and a magnet adhesion method on the top surface, we have realized a full cover structure. This prevents damage from the intrusion of foreign objects from the outside. The top surface of the strip seal has no contact, making it less prone to dust generation.
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 dedicated to 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 robot "PPR," transport robot "SIGNAS," service robot "SEED-Solutions" (including display robots and temperature measurement robots), etc. 5. Seismic Isolation: - Seismic isolation table TSD, seismic isolation module TGS.