Luke11CNC Build Log ,I'm so naïve

[JAZZCNC]

Completely agree agreesive flood coolant is best by far and my next SUPER HD MILL (For diy anyway) will have full "drown if you stand still" coolant and enough air to blow the knickers off a Nun at 50yards.:whistling:

The next best thing I've found for ALi is air but lots of it, don't need high pressure just plenty of volume. . . .This and playing with the chipload/RPM and I tend to find the happy medium.

Best alloy cut so far small amount 7075-T6 for some motor bike engine covers very expensive stuff and scrounged from a mate. . Wish I could get some more.!!

Worst stuff some really crappy 5 series that was like cutting string cheese. . . Night mare.

Anyway I'm off to watch F1 Grandprix on Iplayer been away MotoX-ing all day so missed it. . . . . Don't even think of telling me who won because I'm not returning after posting this. .:rofl:

[Jonathan]

Completely agree agreesive flood coolant is best by far and my next SUPER HD MILL (For diy anyway) will have full "drown if you stand still" coolant and enough air to blow the knickers off a Nun at 50yards.:whistling:

LOL

I think the extrusion you've mounted the ballscrew and rail for X on is 45mm tall? The centre height of the BK/BF block on ballscrew is 25mm, you've said 30mm for the ballnut blocks and the SBR25 rails are 60mm total height. So distance between mounting plate for linear bearings and ballnut block is 30+25+45+60=160mm. That makes the distance between hole centers, with 3/4" thick aluminium 160+19.05=179.05mm. Call it 179mm...
The distance between the mounting holes for linear bearings and ballnut mount plate on the gantry sides I just made is 180mm, shall I make the ballnut blocks 31mm centre height to compensate? I know the sides are slotted so it would still work, but still nicer to have it correct to start with?

Edit: reading that again makes me think it's probably negligible