Gosh, don't time fly - I could have sworn that the last post was a couple of days ago ....
Anyway, after about 30 years I finally have a place to set up my Unimat SL 1000 (sold in the UK by Elliot) as a drilling/milling machine, and my newer Unimat SL Basic as a lathe, permanently. Having to continually clear them away was always a disincentive to their use.
The SL 1000 is now very old (but a valuable machine going on what they fetch on e-bay) and accessories are hard to come by and are expensive.
I've sourced a 12mm X 1mm pitch (the SL 1000 standard) to 14mm X 1mm pitch mandrel so that I can attach more up-to-date Emco 14 X 1 fittings enabling me to use a range of collet chucks for the newer Emco machines. However, the mandrel is in itself a collet chuck for ER11 standard collets (not bad for forty quid!).
Now, my question is - ER11 collets are 18mm long whereas ER16 (other Emco/Unimat collet chucks on offer) are 27mm long and I think might offer more support to the tools. So should I buy an extra collet chuck for ER16 or will ER11 suffice? I'm not anticipating any very heavy milling, at the moment that is.
Any advice gratefully welcome as you will obviously see, I'm a tyro at this.
Phil