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Question on trackball hole size
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Shape D.:
They make adjustable "hole saws". Seen a thread on it once I did. but I cant find it now.

Edit

http://forum.arcadecontrols.com/index.php/topic,18515.0.html
whammoed:
I have used 2 1/4" hole saws and specified 2 1/4" for a laser cut for happs tballs and 2 1/4" is dandy
u_rebelscum:

--- Quote from: Heinekenator on January 27, 2005, 12:54:45 pm ---The top of the CP is 3/4" MDF, with a sheet of 0.193" thick GE Crystallite (lexan?) on top. I bought a 3" Happs trackball. I plan to route the top of the MDF out to flushmount the trackball mounting plate. My problem is that I don't know what size hole to drill through the lexan to accommodate the ball.  Any insight?
--- End quote ---

Sort of depends which 3" happs model you got.  Happs has three: 1) normal (aka old school, aka atari), 2) high lip (aka goldenTee, aka GT), and 3) high ball.

One thread illustrating the differences (and different ways to mount).

There are a few others discussing this more in depth.  Search for threads with trackball, high, and happs, and by me. ;D
Nannuu:
It depends on how you want it to look.  The mounting plate has a hole larger than you need.  There is about a 1/8" lip around the trackball that fits into the hole of the plate.  So if you cut a hole the size of the mounting plate hole you will see the black lip of the TB uncoverd by lexan.  I would recommend measuring the TB once you get it.  I did the same here but I didn't measure quite right so I have some of the lip showing.  I wish I'd cut it smaller.

Also for a TB you may want to bevel/round the lexan to make it a bit smoother when you are sliding your hand over it.  Shown here is a 45 bevel made by a dremel.
quarterback:

--- Quote from: brained on January 27, 2005, 02:48:13 pm ---Well if you got a 3" trackball, get a 3" hole saw.... that worked for me ...


--- End quote ---

Is that true?  For a 3" trackball you want a 3" hole?  Wouldn't that allow you to actually lift the trackball straight up out of the CP?   It seems like the hole would be smaller than the diameter of the trackball.
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