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Bearing Sizes for Trackballs

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Captain_Dingo:

I can tell you that the inside diameter of my bearings is 5mm, from comparing them to a router bit bearing.  I forget what the outside diameter is.

I'd email Bob Roberts and see if he knows the exact specs.  I don't have any calipers here that I can use to get you an exact measurement, unfortunately.

Avery:

I just ordered some bearings from McMaster Carr (www.mcmaster.com).  They stock 1 each, everything in the world of hardware.

I'll have to remeasure them though.  If I haven't posted numbers by tomorrow, pm me to remind me.

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