Quote Originally Posted by Jonathan View Post
They do vary a little. Just had mine out of the spindle mount anyway as I'm investigating dynamic balancing and it's slightly different to that drawing. The main body is 80mm diameter for 200mm, then 11mm more at 68mm diameter, then the chuck protrudes by 39mm. When a tool is installed you need to add about 8mm to the length to account for the collet nut. It shouldn't make much difference to the Z-axis design...
The drawing has a few innacuracies in it and in fact is the same size as yours i suspect, take a look and see if you can spot the mistakes..lol