Precision Plus Ground Ball Screw Assemblies are the highest precision product available, with standard lead accuracies of ±12µm/300mm. These ball screw assemblies feature a FL-Style ball nut, precisely preloaded to customer specifications. This unique nut design provides high repeatability and high stiffness for the most demanding ball screw applications. Each nut comes standard with an integral Delrin wiper to protect against chips and other debris.
Precision Plus Ground Specifications (Metric Units):
Precision Plus Ground Highlights:
Lead accuracies up to eight times those of conventional ball screws for an immediate improvement in machine accuracy
Zero-lash, preloaded designs available with a high stiffness that provides positioning accuracy and repeatability for machine tools, robots, material handling systems, electronic component insertion systems, and more
A gothic arch ball groove geometry to extend service life, and optimize stiffness in preloaded assemblies
Maximum lead error - Class 3 - ±12µm/300mm (.0005"/ft)
Integral wipers and flanges contributing to system cleanliness and mounting ease
Optimum efficiency and cost savings when replacing expensive hydraulic and pneumatic systems
Predictable service life for the most reliable system designs
Dynamic Load (Ball Screws)
Dynamic load rating is the maximum load which a ball bearing screw assembly can maintain for 1.0 million inches of travel (Inch Series) or 1.0 million revolutions (Metric Series).
Design Load (Lead Screws and Glide Screws™)
Maximum load at which a lead screw assembly should be operated. Not applicable for life calculations.
The nominal outside diameter of the screw shaft for a screw only. For a nut it is the nominal outside diameter of the mating screw.
The axial distance a nut travels from one revolution.
The direction of threads on a shaft or in a nut. Left hand means that the nut will move away if rotated counterclockwise. Right hand means the nut will move away if rotated clockwise.
The axial free motion between the nut and screw is called backlash. An Ant-backlash nut is designed to reduce or eliminate this movement.
The lead screw assembly converts rotary motion to linear motion. The lead nut slides over the thread of the screw. Thomson lead screws excel in applications which require the “just right” solution.
The ball screw assembly converts rotary motion to linear motion with recirculating ball bearings. Ball screws have a very low friction coefficient and is typically greater than 90% efficient.
Part linear bearing, part lead screw, the Glide Screw™ from Thomson combines the best features of these products into an easy to install, one-part solution.
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