What is the difference between the ball line guide and the roller line guide of the CNC machining center?

The direct difference between the ball line rail and the roller line rail is that one uses steel balls and the other uses steel columns. The difference between the ball linear rail and the roller linear rail is mainly the bearing capacity. The roller linear guide uses cylindrical rollers in the slider, which has a large contact area and can bear a large load, while the ball linear guide uses spherical rollers in the slider, which can bear a relatively small load. The advantage is that due to the small contact area, the corresponding resistance is also smaller. The conclusion is that the speed of the ball linear guide is fast and the rigidity is poor, and the speed of the roller linear guide is slower but the rigidity is good. You still need to pay attention when buying a machining center.