Common length for a Z axis?

[kanankeban]

I'm into getting two rails for a z axis, to get a 6" travel, what's a common lenght of the rails to acheive this?
Regards...
Hector

[buscht]

You have to add the 6" of travel, plus the length of two bearings, plus the spread between the two bearings, and then a couple of inches for safety.

I'd say 6" travel, 4" for two bearings, 3" spread, 2" safety = 15" rail length.

But this could be as little a 8" or as much as 20" depending upon your machine design.

T

[broncosis]

that would depend on how you plant to mount to them
but normaly you need the amount you want to travel plus the size of your cariage

I am still new to this but I have been milling over my z axis and am yet to com up with a idea I like
that is not huge or bulky