What is the proper angle on a chip tray?

WedgeRock

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I use dice to raise these racks approximately ⅝". Each rack is 14" long, making the angle about 2.5°.

IMG_20200607_212928767.jpg


When I open or close the drawer, the chips have a tendency to topple; the angle is not enough to use gravity to hold the chips in place.

IMG_20200607_212822265.jpg


What is the minimum angle to use gravity to hold the chips in place? What angle do the professional chip trays use?

Anyone?

(FWIW, the drawer will not close with two dice (5° angle), but I'm going to repurpose these into a different storage solution and I'm wondering what angle I should be using.)
 
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WedgeRock

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Just corrected my OP math. Angle is about 2.5°, not 4°.

Instead of using fractions or decimals, I multipled side a (⅝) by 8 to get 5. But then I multiplied the hypotenuse by 5 (not 8) to get 70. The resulting angle was about 4°.

I realized the error in my math this morning. The hypotenuse should have been 112, giving an angle of about 2.5°. No wonder they topple.

I was thinking a 10° angle would work. That would mean the tray would need to rise 2.43" on one end.

Using @CraigT78's suggestion of a 6.725° angle, the rise would be 1.64". @CraigT78, where does your suggestion come from? Have you measured the angle in a tray and/or built your own racks?
 
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BGinGA

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Based on my memory of past slide/topple testing, I'd say somewhere between 5% and 10% angle would be sufficient, depending on chip material, construction, weight, and wear condition.

Making @CraigT78's answer correct (for some chips). :)
 

WedgeRock

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Thanks, @waddadonk. That's exactly what I was looking for.

Not trying to correct for the angle of the camera, it looks like a rise of 7/16ths (1 5/8 minus 1 3/16) over a run of 7¾ inches (8 5/16 minus 9/16) which means an angle of about 3.25°. That seems shallow, but your tray is half as long, and not being opened/closed like a drawer, so perhaps that's enough.
 

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edit:

maybe they do
 
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