Tagged: ball recirculation

Double vs. Single Nuts

Double Nut vs. Single Nut
In the Steinmeyer view of ball screw design, a double nut is always associated with 2-point contact. The advantages of 2-point contact are numerous: lower friction, more consistent torque, higher stiffness, and longer life.

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There are two basic principles for ball recirculation

Dual start ball nut with external return

Let’s sort it out: Ball recirculation is the single most important design detail when it comes to ball screw performance. Why?  Because it determines how smoothly the balls recirculate as well as running performance and product lifetime.  And there is still no generally accepted nomenclature for this characteristic. Result? Engineers use hands and feet, lengthy explanations and quickly drawn sketches to make sure everyone understands what they are talking about. Continue reading