The mount's outer diameter is 68 mm (the same as DeWalt’s 611 or D26200 spindle)
The square inside is 40,1mm x 40,1mm and positioned 5mm off-center to account for
aluminum protective can on the laser head. This can protect the laser driver which is
mounted directly on the laser head.
Easel project for this mount can be found here:
http://easel.inventables.com/projects/187_79JZ3KFSCd5ZsAub4A
Here's how the laser head looks with the mount:
To mount the laser head in the spindle holder, loosen 3 spindle clamp screws and take
the spindle out. Insert the laser holder into the spindle mount, push it all the way down,
to the bottom and re-tighten the clamp screws. Push the laser head into the holder. The
holder is designed for a tight fit with the laser head. The opening is only 0,1mm bigger
than the laser head itself. Once installed it should look like this:
