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  1. #41
    m_c's Avatar
    Lives in East Lothian, United Kingdom. Last Activity: 2 Hours Ago Has been a member for 9-10 years. Has a total post count of 1,839. Received thanks 192 times, giving thanks to others 5 times.
    Quote Originally Posted by m_c View Post
    A steel ball bearing isn't guaranteed to conduct, as even a thin layer of grease will act as an insulator

  2. #42
    As an aside, does anyone know (or can check) if a typical chinese water cooled 800W spindle, has electrical continuity from its outer metal casing to its shaft?
    Last edited by HankMcSpank; 27-06-2013 at 02:35 PM.

  3. #43
    Kn8's Avatar
    Location unknown. Last Activity: 10-11-2014 Has been a member for 7-8 years. Has a total post count of 58. Received thanks 1 times, giving thanks to others 0 times.
    Hi I have just checked my 800W water cooled spindle for continuity between the outer case & the shaft rotating the shaft by hand the resistance measured varies between 2 & 7 ohms

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  5. #44
    If anyone else has a spare 300W spindle & associated mount (perhaps you've upgraded to water cooled spindle etc), then please shoot me a PM cos I need one more :-)
    Last edited by HankMcSpank; 29-08-2013 at 10:20 PM.

  6. #45
    fifa's Avatar
    Lives in bristol, United Kingdom. Last Activity: 3 Weeks Ago Has been a member for 0-1 years. Has a total post count of 31. Received thanks 2 times, giving thanks to others 0 times.
    Spinle can be easy grounded also during operation. Add the axial brush in the top...

    kr

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