Ball Screw Preloads and Metrics

Preloading is utilized to extend the nourish precision and unbending nature of ball screws. Why is this vital? In numerous applications utilizing ball screw activation, position exactness is of most extreme significance. With numerous ball screw driven actuators, position precision can be accomplished inside some microns. Any deviation seem compromise the plan expectation. Hence preloading is connected to decrease hub clearance between a ball nut and the screw shaft and to also accomplish exact situating. It is additionally vital to apply the correct sum of preloading to anticipate intemperate warm era through the ball screw’s anticipated life. On the “Axial Clearance” column of the ball screw selection chart:

• 0 (Preload)

• 005 or Less

• 030 or Less

• 10 or Less

If backlash or slip is not a major concern in your application, it is advised to choose a ball screw with larger clearance (directly related to accuracy grade). This will keep cost down and prevent overdesigning.