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The NB STROKE BUSH - 0n the left - is a linear and rotational motion mechanism using the rotational motion of ball elements between an outer cylinder and a shaft. It is compact and withstands high loading. The retainer is made of a light metal alloy with high wear resistance. Smooth motion is achieved in high-speed and high-acceleration conditions. Although the linear motion is limited to a specific stroke length, the combined rotation and stroke motion is executed with very little frictional resistance.
The STROKE BUSH has no ball return mechanism. The balls are embedded into a sleeve and they roll on the shaft’s outside diameter and the housing’s inside diameter while the sleeve is suspended between the two, providing solid lubrication to the ball bearing.
The NB BALL SPLINE - on the right - is a linear motion mechanism utilizing the rolling motion of recirculating ball elements that can sustain loads and transfer torque simultaneously. It consists of a spline shaft with raceway grooves and a spline nut. Its greater ability to transfer torque is a result of the ball elements traveling the grooves. The spline nut consists of an outer cylinder (main body), retainer, side rings, and ball elements.
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