Stroke Ball Spline

The NB stroke ball spline consists of a nut and a shaft both with raceway grooves . Since the retainer in the nut is equipped with a ball pocket, the steel balls, (rolling elements) do not contact each other, which allows for a smooth linear motion.

In a linear motion, however, the retainer moves a half of the travel distance. Therefore, the linear travel stroke is limited up to twice as long as the distance that the retainer can move in the nut. For normal operation, it is recommended to consider 80% of the maximum stroke shown in the dimension list as an actual travel distance.

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Extremely Small Dynamic Friction and Low Noise

The rolling elements are separated by the ball pockets so that they do not contact each other. The stroke length is limited, but extremely small dynamic friction and low noise are realized because the rolling elements do not circulate.

Compact Size

With the nut about 20% smaller than existing ball splines, it contributes to space saving.

All Stainless Steel

Since all the components are made of stainless steel, this stroke ball spline has an excellent corrosion resistance and heat resistance (operating temperature: -20 to +140). It is ideal for clean-room or vacuum applications.

Lubrication

A lubricant groove and two lubrication holes are provided on the outer surface of the nut, which allow for an easy designing of lubricant replenishment.