Chinese 300W DC spindle - is the spindle shaft grounded?

[HankMcSpank]

Bugger about the continuity Hank, why not just add another bearing to the top to connect off?.

That'd be the best way - but I don't have any bearing & it'd need to be a press (firm) fit - heaven knows where I'd get one of those ...in the meantime, I fashioned a heath robinson arrangement...



....yes that green material is acrylic! - I don't have a strong enough machine to mill aluminium ...and besides, there ain't gonna much stress on this particular part. It was quite an ordeal to get right, there are only two screws at the top of the spindle (they run the whole length down through the spindle, so I had to piggy back that makeshift bracket off those two screw holes, which for the record, on this spindle are 41mm between centres!!)

& which will ultimately hold a spring loaded test probey/pointy thing (which I have in abundance), & look a bit like this....



& hopefully press down on the centre of the spindle shaft! (thereby allowing me to attach ground to the tool tip)