[QuinnSjoblom]

Maybe the designer should be introduced to LocTite products or cyanoacrylate adhesives

At <$2.00 each grinding would be worth a try I guess.

Yeah, for prototyping he may just have to put some ca on them unless he wants to pay more for a special tool. Thing is, this insert is already used on many other models they already have. Large production runs are done in china. I assume it's mostly waterjet, but they must have a 4.33mm drill for the holes. I just do the quick turn around small batches.

I ordered a couple 4.305 and 4.365. I'll probably drill with the 4.305 and then chase with the ground down bit if I can get that to work. I also ordered a 4.33 gauge pin. Who knows, maybe I can grind some flutes into that and use it to ream/form the 4.305 hole to 4.33. Only needs to get a thou bigger. Probably not even that much. Maybe I can tap some runout into the 4.305 to gain a little lol. Or just use one of my old cheap er collets. Probably already has a thou of runout