Ball Screw

Buy balls and rods This model demonstrates the function of a ball screw as a linear motion mechanism. It takes 4mm bearing balls and includes a funnel for loading the balls into the ball nut.The screw has a center tube that accepts a 12mm carbon fiber rod and glue for assembly. This screw isn't particularly smooth and real precision ball screws can be found for less than $30.That being said, examining this model will give you a better understanding of how the recirculating ball nut functions and which surfaces are important in the operation of the mechanism. Perfect for a Saturday afternoon project.