THK BNK Series Positioning Ball Screws

The THK BNK Series is a compact ball screw designed for smooth and precise linear motion in space-constrained automation and positioning applications. Featuring a flange-type nut with a compact nut body, the BNK series delivers stable performance, low friction, and reliable positioning accuracy suited for small automation systems and precision equipment.

Available in both precision ground and rolled shaft configurations across a range of shaft diameters, leads, and lengths, the BNK series offers flexibility to suit different speed, load, and accuracy requirements. The labyrinth seal integrated into the nut helps protect against contamination without adding significant length to the assembly.

Available models include the BNK0501-3G0+77LC3Y with a 5mm shaft and 1mm lead at 77mm length, the BNK1004-2.5RRG2+180LC7Y with a 10mm shaft and 4mm lead at 180mm length, and the BNK1010-1.5RRG2+290LC7Y with a 10mm shaft and 10mm lead at 290mm length.