ER25 vs ER32 ?

[Mayhem]

Henry, I can only see that the smaller series allow you to hold smaller diameter items. Also, the clamping range is reduced on the smaller collets. Perhaps the larger series encroach more into the work envelope but I am unsure if this would be sufficient to warrant going down in capacity.

I too would have gone with ER40 but the mill came with an ER32 chuck and collets. Eventually I will make an ER32 collet chuck for my lathe.