Dick Bernard wrote on Dec 15
th, 2014 at 6:56am:
Sure makes a person wonder why the manufacturer makes these things with tabs followed up with instructions to remove the tabs.
The manufacturer's instructions are not the same as the "instructions" which come from vendors (like Craft Supplies, say, which is where I get my CG mechanisms).
The manufacturer's instructions are to use all metric drill sizes (I forget the actual numbers) which give a much tighter fit requiring that the components be pressed in mechanically using some kind of device to exert the necessary forces.
I imagine the lathe tailstock could be made to serve for this purpose, but I haven't tried it myself.
Using this approach, the fit is so tight that the little ribs on the grinder cage and the cap unit actually "bite" into the wood to prevent any future radial movement, then the locking tabs snap into the retaining groove to prevent axial movement. No epoxy or other adhesives are recommended at all.
The instructions which come from most US vendors (cutting off the tabs, using inch forstners instead of metric ,and gluing with epoxy) are basically an alternative approach which avoids having to rig a mechanical press to insert the components into the wood body, and which actually does work if executed carefully (I have over 100 units out there somewhere using this method, and I've had no failures yet), but I don't think these instructions originated with the manufacturers.