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

[HankMcSpank]

For anyone intrested the new spindle Hank has ordered is for sale on ebay

The advert doesn't show the P&P to the UK...it's $23 & is a 10 day postal service.

(for all the spindle's back bracket is an exact fit for the sable 2015 - which I have - I'm sure it's an easy enough job to either change the backplate or knock up some form of adapter plate....the sable 2015 Z axis has M5 holes 71mm between centres & two rows spaced 27mm between centres)

How about bodging some electric carbon brushes around the shaft, like those used in electric motors, to give you the electrical continuity ?

Off eBay a pair of these costs about £1.50.

Bodge 'A' is my present attack (a spring loaded test probe, pressing down in the middle if the top shaft)

Bodge 'B' ...could be what you've suggested

...fortunately, I excel at bodging.

A better option would be to either source some bearings that are electrically conductive between inner & outer casing or buy a spindle that has these fitted!