The new Type SPR/SPS caged ball LM Guide incorporates unique THK technology to achieve ultra-low waving and ultra-high rigidity. Featuring additional raceway grooves, ultra-long blocks, and an increased number of small-diameter balls, the Type SPR/SPS improves the precision of load-bearing strokes and provides stable motion.
By doubling the number of raceway grooves to eight, the Type SPR/SPS reduces the load on the balls by 50 percent and enables ultra-low waving on a nanoscopic scale. In addition, the use of ultra-long blocks allows for the incorporation of more balls and further reduces each ball’s individual load. An increased number of small-diameter load-bearing balls stabilizes support and decreases compression when under a load. The resulting ultra-low waving performance of the Type SPR/SPS is comparable to that of static pressure guides, while its ultra-high rigidity exceeds that of roller guides.
The Radial Type SPR and the 4-Way Equal Load Type SPS are both capable of bearing loads in the radial, reverse-radial, and horizontal directions. The Type SPR is effective on radial loads when force is applied
perpendicular to the shaft. It is suitable
for the stroke of heavy machines. The Type SPS positions each ball at a contact angle of 45 degrees and bears loads from all directions. It can be used in various positions, such as horizontally and upside down. Rail lengths for both types range from 160mm to 3,090mm.
Applications include semiconductor manufacturing equipment, ultra-precision industrial machines, high-precision machining centers, lathes, surface grinders, FPD manufacturing equipment, inspection equipment, and high-performance measurement devices.
The Type SPR/SPS features patented THK Caged Technology for smooth and quiet motion. Caged Technology employs a synthetic resin cage with a patented curvature that cradles each ball and separates it from the next. The spaces between the rolling elements retain grease and act as a lubrication system for long-term maintenance-free operation. Other Caged Technology benefits include increased speed and accuracy, decreased noise levels, low dust generation and long life.
THK manufactures the widest range of linear motion products, including LM guides, ball screws, mechanical actuators and ball splines and more. All THK products have been designed and manufactured to meet the strictest requirements. THK’s experienced Global Engineering Team can provide customized linear motion solutions from their standard linear motion products as well as from mechatronics products for the most demanding applications.
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