The Role of Shaft Tolerances in Precise Motion Control
In robotics, shaft tolerances play a critical role in achieving smooth, precise motion — but how are they defined and controlled?
In this video, we explore how engineers determine shaft fit, clearance, and interference levels to ensure reliable performance in robotic joints and assemblies. Whether you’re designing articulated robots or compact motion systems, understanding shaft tolerances is key to building reliable, long-lasting movement.
Transcript of How Shaft Tolerances are Defined Video
Well, for the shaft tolerances, you always have to take a look at the tolerances for the inner diameter of the cross roller bearing. And that’s how you can figure out what is the acceptable tolerance amount and then you see how much tolerance is on the rod itself. So when you understand what’s needed between those two, then you can properly find the shaft. But as far as the housing goes, that’s very very dependent on the application.
If it’s for a cross roller and then if we talk about customization, then it’s going to be different for every case. But for a shaft, it’s a rod going through a hole. So, you have to find what is the allowable tolerance for the bearing plus or minus what value you can have for the the inner diameter of the cross roller. And then what is the plus or minus value that you’re going to have for the shaft itself.
