They're just saying that it could be used as is for a Z axis.
It's not just a linear rail, it's a complete assembly with 2 rails, bearing blocks, and probably a ballscrew.
Forgive my ignorance, I'm new to linear motion rails. Try as I might, after reading a ton of literature I cannot figure out why a rail would be described by the seller as "Z-axis". Specifically, a THK KR33 series rail. Couldn't a rail like this be used in any orientation, or is there some difference in a rail from the standard models that makes it more suitable for use as the Z-axis?
For instance, here's a completed auction for new THK KR33 rails described as Z-axis.
https://www.ebay.com/itm/THK-KR3310A...w/301839079698
They're just saying that it could be used as is for a Z axis.
It's not just a linear rail, it's a complete assembly with 2 rails, bearing blocks, and probably a ballscrew.
Gerry
UCCNC 2017 Screenset
[URL]http://www.thecncwoodworker.com/2017.html[/URL]
Mach3 2010 Screenset
[URL]http://www.thecncwoodworker.com/2010.html[/URL]
JointCAM - CNC Dovetails & Box Joints
[URL]http://www.g-forcecnc.com/jointcam.html[/URL]
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
A rail is a rail. Maybe that is what the seller decided it was for. It does look short, so might be best used for a Z axis. It could be used in any orientation.
Jim Dawson
Sandy, Oregon, USA