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Ballscrew/Spline BNS-V

August 29, 2018
Ballscrew/Spline BNS-V

THK’s latest ballscrew/spline BNS-V features a compact and lightweight structure. The low inertia BNS-V enables quick starts and stops during high-speed operation.

The BNS-V is a stroke/rotary unit with ballscrew grooves and a ball spline groove that cross one another on a single shaft. The nuts of the ballscrew and the ball spline have dedicated support bearings directly embedded on the circumference of the nuts. Some advantages of the new ballscrew/spline BNS-V include a highly rigid shaft support, an angular-contact structure for highly accurate positioning and smooth motion with low noise.

The BNS-V is a downsized version of THK’s popular ballscrew/spline BNS-A. The BNS-V features a compact 72mm outer diameter, a low weight of 1.00kg and a low inertia of 2.00kg•cm2, contrasted with the BNS-A 86mm outer diameter, weight of 1.67kg and inertia of 4.32kg•cm2.

Related Glossary Terms

  • outer diameter ( OD)

    outer diameter ( OD)

    Dimension that defines the exterior diameter of a cylindrical or round part. See ID, inner diameter.