FineLine Ball Screws were developed by BS&A (previously known as Warner Linear) in Wolfschlugen, Germany, and have been sold in Europe since 1999. The screws have been successfully deployed in high-precision applications in transporation, manufacturing, health, fitness, robotics, plastics and packaging industries. BS&A’s PSF Technology™ enables us to manufacture ball screws with accuracy and performance in the same class as precision ground screws, yet without the extreme expense of grinding processes.

Precision Screw Forming (PSF) Technology is based on a proprietary process of precision roll forming. Through years of research, development and partnering with steel suppliers and equipment manufacturers we have developed a CNC-based rolling process. At the heart of the process is the ability to dynamically control both roller dies as well as other variables in the manufacturing process. The end result of this German-engineered process is the production of highly cost effective rolled product with capabilities equaling those normally attributed only to ground screws.

Features and Benefits

• Accuracy: Available in ISO accuracy grades P3 and P5 (permissible travel variation of 12 µm/300 mm and 23µm/300 mm, respectively), as well as in transport grades T5 and T7.
  
  
• Smooth operation: Made of high carbon alloy steel that we induction harden, stress relieve, and then polish to insure excellent operating smoothness.
  
  
• Quiet operation: High degree of accuracy and exceptional surface finish assure quiet operation.
  
  
• Consistent running torque: Precise screw cylindricality and ball-track roundness (max. deviation of 3 to 6 µm), both of which are necessary for consistent running torque in critical applications such as machine tool slides.
  
  
• Preloads: Can be supplied with customer-specified preloads from zero to 13% of the dynamic load rating.
  
  
• Flanges and Finish Machining: Available with flanged and non-flanged nut assemblies and machined standard end journals.