3 Axis CNC router

[JAZZCNC]

The BK/BF can be a tight fit so a light flick round the shaft with some fine emery is some times required. They can be pulled on/off with even pressure but some times you will need to give them a very very light tap evenly on either side with rubber mallet.

Thing to watch out for is the rubber bearing seal rubbing on the screw causing binding when butted up to the little spacer. Some times you'll need to either add another spacer or push the seal in further, just be careful not to push in so far it rubs on the bearings.
Also don't tighten the nut like nut and bolt just nip it up enough to take the play out then lock with grub screws. If you over tighten you'll cause binding and wear the bearings quickly. After a week or so running then re-check for any settle movement.


The ball-screws I just use light way oil pumped into the nuts every so often. You don't need much for every day use and it should just leave a very light film on the screw after running up & down it's length. If the screw is dripping or blatherd then thats too much.!! Every now and again I'll pump loads of oil thru the nut to flush any crap out.