WillAdams said:
Including 8mm collets seems a no-brainer since they're essentially 5/16", no?
I've been switching over to 8mm (5/16") tooling on my CNC and have been finding said tooling far more rigid.
Yep. 8mm is just the nice balance for a hand-held tool use.
6 mm (and 1/4) is too weak for many uses and 12 mm (and 1/2) are overkill for most uses
Where one *needs* 12mm+ one is already moving into the route-table-really-desired territory where e.g. an OF1010 would simply not have enough oomph to begin with.
My collection is all 8mm except a few dedicated trim-router bits.
I think in US 1/2 is so popular precisely because 1/4 is just too weak for so many hand-held uses that people got used to "needing 1/2" almost as a default by it being "the thing bigger than 1/4".