Luke11CNC Build Log ,I'm so naïve

[Jonathan]

well the ball screw ends where a bit tight.

It varied between 11.992mm and 12.000mm depending on where I measured ... so a slight taper.

The big bearing end had to go in the oven and be persuaded with a big adjuster (lump hammer and a socket) but now the lock nut at the end will not go on (yes) i must of caught the thread when I had the persuader in action

Typical, I'd try it and see. If they don't fall off then no problem. On my RM1610 ballscrew (Y-axis) I had the opposite problem yesterday - the bearing was not as tight as yours and I must have not done the nut up tight enough...took me ages to work out what what causing the Y-axis to loose position.

not to worry I don't think it's going anywhere or should I have it rethreaded :question::question:

Bigger spanner!! But first check that the two grubscrews in the edge of the nut which lock it in position are out. Also check the pieces that the grubscrews push onto the thread are not interfering as if they've rotated a little they will stop the nut. I had that problem on one of the nuts that came with the RM2510 ballscrews, so a bit bigger.

I've made the extra 4 brackets - 8mm holes and better finish this time. Couplings almost done too...