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• Precision Ground Ballscrew
Hiwin precision ballscrews are made through a grinding process of the screw spindle. Precision ground ballscrews provide high positioning accuracy and repeatability, smooth movement and long service life. These highly efficient ballscrews are a perfect solution for a variety of applications.
• Rolled Ballscrew
The major differences between a rolled and ground ballscrew are the manufacturing process, the lead error definition and geometrical tolerances. Hiwin rolled ballscrews are made through a rolling process of the screw spindle instead of a grinding process. Rolled ballscrews provide smooth movement and low friction which can be supplied quickly from stock, at a lower production cost.
• Super S Series-
The Super S series uses a patented design return system that can absorb ball impact noise which greatly reduces the noise intensity and allows the ballscrew to sustain peak performance in rigorous environments. The modified return system improves the strength of the return structure which increases the Dm-N value and reduces the ball nut diameter by 18%-32%.
• Super T Series-
The Super T series circulation path has the elements leaving the ball track tangential to the PCD and coordinating with the lead angle of the ballscrew shafting. This optimal design not only reduces the noise level but also vibrations leading to smoother rotation.
• Miniature Ground Ballscrews
Hiwin miniature ground ballscrews are made through a grinding process of the screw spindle. Miniature ground ballscrews are compact, perfect for those smaller load and shorter stroke applications. These highly efficient ballscrews provide high positioning accuracy and repeatability, smooth movement and long service life.
• R1 Series Rotating Nut
Hiwin’s rotating nut utilizes a special end cap design that allows the steel balls to circulate inside the nut while featuring an integral bearing that allows the ballscrew shaft to be fixed. This unique design reduces noise generated at high speeds and offers higher axial loading and stiffness.
• Heavy Load Series
Heavy load ballscrews offer 2-3 times higher loading capacity than a standard ballscrew series. They have reinforced circulation systems that are suitable for high speed conditions and are able to achieve a longer service life.
• Roller Screw
Roller screws use rollers instead of steel balls, which reduce the stress concentration due to the greater contact surface area. They offer 1.5-2 times higher loading capacity than a standard ballscrew series and are capable of higher axial loading due to the reinforced circulation system. By incorporating rollers, these screws offer super high rigidity and are able to achieve a longer service life.
The NSK 7209CTYNDULP4 is a high-precision, single-row angular contact ball bearing supplied as a universally ground duplex set (DU).
Technical Specifications & Dimensions
• Bore Diameter (d): 45 mm
• Outside Diameter (D): 85 mm
• Width (B): 19 mm per bearing
• Contact Angle (C): 15°
• Cage Type (TYN): Ball-guided polyamide/resin cage designed for lower friction and reduced noise.
• Preload / Arrangement (DU / L): Universally ground duplex pair with a light preload.
• Accuracy Class (P4): ISO Tolerance Class 4 (equivalent to ABEC 7), offering high running and dimensional precision.
• Dynamic Load Rating (Cr): 51.5 kN
• Static Load Rating (C0r): 28.8 kN
• Limiting Speeds: 17,700 rpm (grease) / 22,000–27,000 rpm (oil/oil-air)
• Weight / Mass: ~0.406 kg per bearing
Commonly used in high-speed applications like CNC machine tool spindles and precision machinery.