Vevor spindle 1.5kw air cooled

Hey guys, can anyone tell me the spindle shaft spanner/wrench size.

I know the er11 collet spanner is 17mm but not sure about the shaft flats and what size is needed and thought surely someone may know?

As far as I know, Vevor’s bearings are not well suited for prolonged use. Rather try to get a gpenny or rattmmotor.

FYI it’s 13mm. Will leave the post in case any one wants to know in future

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