Anyone knows the correct drill bit size for the Betson Imperial 3" trackball?

Pengo13

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Anyone knows the correct drill bit size for the Betson Imperial 3" trackball?

I want the ball and lip to show. Thanks
 
I want the ball and lip to show. Thanks

Assuming you have the trackball assy, take it apart ( four screws on bottom ) then measure across the distance of the lip...whalla! If I have time at work today I will measure it for you ( in case you don't have the trackball ).

Dave.
 
Thanks for the reply. I'm sure that someone in the forum has already drilled holes for these type of trackballs. Hopefully they'll reply to this thread.
 
I just measured a trackball assembly. The trackball measures 3 inches. So, a 3 1/8" hole saw will give you all the room you need to fit the lip and ball comfortly.

Happy building !
Dave.
 
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