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Screw driven tables – Maximum Speeds

June 14, 2019

Screw driven linear motion tables secure the screw at each end with different types of end supports. The screw is also held in place where it is driving the carriage. As high rotational speeds reach the natural frequency of the screw, they cause it to vibrate and whip. Every linear table will have a maximum safe operating speed which is dependent upon the screw diameter, lead and length. It is also impacted by the ball screw supports.

Below is an example of a group of Lintech tables reflecting maximum speeds. The foot note at the bottom also reflects the basic factors affecting speed potential.

Ball Screw Max Speeds

If we are not talking about a standard Lintech table, Lintech also offers a tool to help determine the screw maximum(critical) speed. On the right-hand side of the Lintech home page there is an area with a link called “sizing apps”. On that page, there is a link to “critical speed”. There you will find a calculator that enables you to plug-in numbers for screw variations and come up with the maximum safe speed.

Critical Speed

For further information on screw speeds or any other design criteria, please contact Lintech.

 

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