This 16mm steel shaft is made of hardened C45 steel. In conjunction with an appropriate bearing and supports it would make for an ideal linear slide or track to guide anything from a camera to an xy table.
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In a linear system, you'll need bearings to slide across your linear shaft. Here you'll find a list of linear bearings that will fit on this shaft:
|Image||Part Number||Price||Inner Diameter|
These supports can be placed on the ends of the shaft or in regions where the bearings don't travel in order to hold the shaft in place.