This is a 3d printable replacement for the Stepcraft vacuum adapter for HF500 spindle.
I was having clogging issues with the original one wen cutting MDF so I redesigned it to make the internal tubes wider, and keep the magnetic hold and the rest of parts from the original.
You need 8 cylinder magnets 3mm diameter x 2mm height that need to be inserted with a print pause.
I started with 4 magnets and kept increasing the number in several iterations until I had a reliable hold.
It's important that you insert a pause command before the holes of the magnets are covered. I know this function is at least available for Cura and Simplify3D. Then you can insert them and resume printing.
I went through several versions before this one ;)
Designed with Fusion360
I also added the f3d file from Fusion360 in case you want to make any modifications.
The lateral clamp does not fit perfectly but is close enough to avoid much movement and allow mounting easily.