[Texasbowhunter]

Not to keep beating a dead horse but can we discuss ball screw length one more time?
If the ball screw is advertised as 1000mm does that mean the threaded portion to be 1000mm?
So, with the BK/BF mounts were attached then a 1000mm linear rail would sit inside...Right? theoretically
Thanks
Paul
Just attempting to ensure I order the correct length...

[joeavaerage]

Hi,

If the ball screw is advertised as 1000mm does that mean the threaded portion to be 1000mm?

Usually no, 1000mm means 1000mm overall. Typically 200mm-300mm is taken up with the end machining leaving 700mm-800mm of thread.
The actual travel will be the length of the thread LESS the length of the ballnut LESS 10mm or so.....no need to run to the very end of the thread.
This is where a double nut screw may have less travel than a single nut design. Double nut screws are preferred because the two nuts can be very precisely ground
to produce exactly the amount of preload without having to worry about critical ballsizes etc, but a double nut might be 120mm long whereas a single nut might be
60mm long. Therefore the single nut design will have a little more travel than the double nut for the same length of thread.

Craig