Ball Screw/Spline

THK released its Ball Screw/Spline BNS-V, a stroke/rotary unit with ball screw grooves and a ball spline groove that cross one another on a single shaft. The nuts of the ball screw and the ball spline have dedicated support bearings directly embedded on the circumference of the nuts. The BNS-V is a downsized version of THK’s Ball Screw/Spline BNS-A. The BNS-V features a ø72 outer diameter, a weight of 1.00kg and an inertia of 2.00kg•cm2, contrasted with the BNS-A ø86 outer diameter, weight of 1.67kg and inertia of 4.32kg•cm2.
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