In its most basic form, a double ball nut is essentially two single ball nuts that have been tensioned against each other to induce preload. Three common methods for inducing preload in a double nut are: With a spacer ring between the ball nut halves With a spring between the ball nut halves By creating […]
How to calculate ball screw rigidity
The rigidity of a ball screw determines the amount of elastic deformation it will experience in the axial direction, under a given load. Elastic deformation, and therefore rigidity, is a fundamental characteristic in selecting and sizing a ball screw, as it affects the positioning accuracy of the system. δ = Elastic deformation (μm) Fa = Applied force in […]
What is preload?
Have you ever wondered, “what is preload”? We’re here to help! Applications that use linear bearings or ball screws often require precise positioning, which means that the motion components must be rigid. And while recirculating ball guides and screws are able to carry large loads, they inherently have clearance, or backlash, due to the size […]