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ball screw
- Posted: February 12, 2016
Reprint of Danielle Collins post, Linear Motion Tips, on Friday, December 11, 2015
As an integral part of industrial machines and processes, ball screw assemblies often operate in environments with elevated temperatures. Heat can be generated by other mechanical and electrical components in the machine, and in some cases, is a byproduct of the process itself. And, like other motion products with sliding or rolling friction, ball screws generate heat of their own as they run. This heat, and especially the change in temperature that occurs...
Categories: Technical Support - Posted: January 08, 2015
Reprint of a December 2, 2014 Design World White Paper by Danielle Collins
While ironless linear motors have been used in semiconductor and electronic applications for more than a decade, they are still viewed by many designers and OEMs as “niche” products. But the perception of linear motors as a costly solution for unique applications is slowly changing, as more industries are adopting them as replacements for ball screws in packaging, assembly, and part loading applications. And while the cost of linear motor technology has dropped over the past decade, the choice between a linear motor and a ball screw must take into account both the application’s performance requirements and the total cost of ownership over the life of the machine or system. Below are some of the key parameters to consider when comparing and choosing between ball screws and linear motors…...
Categories: Technical Support - Posted: March 04, 2014
The ball screw drive is an assembly that converts rotary motion to linear motion and vice versa. The ball screw drive consists of a ball screw and a ball nut with recirculating ball bearings.
The connection between the screw and the nut is made by ball bearings that roll in the matching forms in the screw and ball nut. The forces transmitted are distributed over a large number of ball bearings, giving a comparatively low relative load per ball. With rolling elements the ball screw drive has a very low friction coefficient.
Ball screw drives typically provide mechanical efficiency of greater than 90% so their higher initial cost is often offset by reduced power requirements.
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