What is a ball screw assembly?
A ball screw assembly is made up of a threaded shaft and a nut. They work in the same way as ball bearings. Before you choose one, you’ll need to factor in the following considerations:
Static and Dynamic loads
Static loads are typically straightforward. Maximum limit is achieved when the screw and nut are loaded to the fullest capacity without any damage. However, dynamic loads can impact the lifespan of the ball screws so you’ll need to keep these in mind when you shop around for the right ball screw. Tip: for larger loads, it would be better to go for screws in larger sizes, says Machine Design. These are far better equipped to handle larger loads so you can count on them to last much, much longer.
Another piece of advice before you buy these screws: keep in mind that they only work for thrust loads. If there are overturning or side load motions, this significantly decreases the lifespan of your screw, increasing the instances of wear and tear.
This also plays a factor in your screw’s lifespan. Will the screw have ample support from either side? The right setup can either make or break the strength of your ball screw assembly.
The critical speed often depends on a number of things: you’ll have to consider end fixity and diameter as well as unsupported length. You’ll need to limit the speed to about 80 percent to ensure optimum performance of your screws.
Shopping for screws
Be sure to look for quality screws. Don’t go for these parts at low-ball prices. Screws are an essential part of your equipment. Using poor quality ones can compromise your equipment and lead to operational issues. To make sure you’re buying quality parts, buy them from a reliable supplier.
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