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  • Ball screw basics
    The pros and cons of single and double-nut balls screws. Ball screws are preloaded using different methods, resulting in either two or four-point contact of load balls. And all preload methods, whether by using oversized balls, shifting pitch, or using a double nut, serve the same purpose
  • Ball-screw basics: Debunking the myths
    Misconceptions can lead to overspending and premature failure. Linear Motion and Assembly Technologies Ball screws come in a myriad of types and styles. Look at factors such as accuracy, preloading, and lubrication to help match the right product to a given application. With so many different ball
  • Keeping ball screws accurate and reliable
    receive substantial side loads. Use two indicators, or mark the high point and note the readings, then compare them to other journal and determine the difference. Nut squareness helps avoid cocking. When using V-blocks, a ball can be inserted into one center hole of the screw and the screw pushed against
  • Which last longer, single or double nuts?
    Whether or not the shaft or just the nut rotates can make a critical difference, and not just in terms of critical speeds. Engineers working with ball screws usually use conventional life-expectancy equations for nuts with two-point contact. When it comes to four-point contact nuts, however, many
  • Actuators tackle the tough jobs
    Roller screws have the edge on ball screws in demanding, continuous-duty tasks. Roller screws have a series of threaded, helical rollers assembled in a planetary arrangement around a threaded shaft. They convert a motor's rotary motion into linear movement of the shaft or nut. Rollers screws have
  • Secrets of Accurate Machining
    tools. So it has become crucial to avoid thermally induced deviations in workpiece dimensions. Active cooling, symmetrically designed machine structures, and temperature measurements are already common practice. The primary cause of thermal drift is in the recirculating ball screws of the axis
  • Rolling-ring actuators spool up production, cut costs
    Rolling-ring bearings are basically standard ball bearings but with a ridge machined into the inner race. Just the ridge apex makes contact with a smooth, threadless shaft inserted in the bearing bore. The resulting clearance permits angling the bearing left or right while maintaining continuous

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