Water cooled chinese spindle collets, Advice from owners please

[craigrobbo]

Hey guys, I have ordered a chinese cnc 3040 with a 1.5kw spindle.

I am wondering from owners of the watercooled 0.8kw 1.5kw and 2.2kw could tell me if you have ever dismantled one?

The one i bought comes with an ER11 collets, but there seems to be replacement collet system for spindles from ER11 ER16 and ER20 and i am wondering if they are actually interchangeable?

Would anyone be able to supply detailed pictures and if possible show one dismantled and/or confirm they are changeable?

If so which one its changeable from/to


here is a link to just one replacement i found on ebay, but there are lots on there like it with different shanks (ie some taperd some straight)

http://www.ebay.co.uk/itm/C16-ER20A-...item3f014a5d1d

and

http://www.ebay.co.uk/itm/ER20-MT2-M...item231c834a95
Thanks

Craig