Rolling Element Linear Guides | Engineer to Engineer | MISUMI USA


Hello, and welcome to another episode of Engineer To Engineer! Today on Engineer To Engineer You’ll be hearing from our product manager, Ryan Middlebrook, as he discusses the differences and benefits of two of our core rolling element linear guides. He’ll also briefly explain some various applications that each linear guide can be useful for. Let’s go join Ryan. The first is a round rail linear bearing assembly. This product is great for low to moderate load requirements, low to moderate accuracy requirements, and it also allows you to move a load over an unsupported gap. It doesn’t have to be continuously supported and it will tolerate some misalignment as well as deflection. It’s typically used in a parallel configuration meaning that you have to have to rails in parallel with four bearings, two bearings per rail. and is typically used in a range of different applications. for different reasons 3D printing for example is a frequent user of this technology because it can’t traverse a clear span. So an unsupported area and still support the load. Additionally, in packaging where you may have a sealer opening and closing to seal a plastic bag or some other type of packaging material where you’re not able to support the axis is an ideal application for this type of guide technology. It also has a relatively lower rolling resistance than a square rail product because the end seals on the bearings make minimal contact with the inner race or linear shaft generating a low level resistance. The balls in the loaded circuit generate a relatively lower load capability than what you might find in a square rail guide product because it is a point-to-point contact between the ball and the round linear shaft. That brings us to our next technology, which also uses a loaded ball technology but in a different fashion. On the inner race you may be able to see here that this product has a ball conforming groove. This groove matches the diameter of the loaded ball in the bearing in order to maximize the surface contact the ball has with the inner race. What this facilitates is that it allows a maximum transfer of load from the carriage to the inner race. So in effect, it’s able to generate a higher load capability per ball because of the higher surface contact with the inner race. So whereas with the round rail product you have a point-to-point contact, this is more indicative of a line-to-line contact. and therefore generates a higher load capability. The benefits of this product, in addition to the higher load capability, are that it can be used in a single rail configuration, we have a range of different flange styles, and additionally, carriage styles, to accommodate different envelope requirements The trade off is that it has to consistently be mounted to a machine metal surface and continuously supported because it cannot tolerate any of the deflection or potential misalignment that a round rail bearing can tolerate. You’ll typically see these used in machine tool type applications They are great for moderate to high load requirements moderate to high accuracy requirements and therefore they’re used in a range of different applications that require that criteria. Well, that does it for this episode of Engineer To Engineer. We hope you’ve found this helpful and if you have any questions about our linear guides or any of our other products, feel free to post it on our social media. That way, everyone benefits from seeing your question as well as our answer. You can also reach us directly through [email protected] If you liked this video, hit the “thumbs up” button and also be sure to subscribe to our channel to stay up to date on all of our new content. In the meantime, check out some of our other videos, our social media, and our new blog the Misumi Mech Lab blog.misumiusa.com You can find the links to all of those in the description below. Thanks for joining us and we’ll see you in the next video.