Quote Originally Posted by John S View Post
Build one.

This one is only 1,5Kw, 2HP and ER32 but everything is adaptable.
Can't be arsed with making spindles. The hole point of a spindle is accurecy and I feel that without precision grinding equipment, balancing and correct hardening it's not possible to do and give required accurecy and longevity.! . . It's certainly beyond my equipment.

Add real ATC abilty with industry standard tapers for easily available off the shelf tool holders and it goes to another level.

IMO MT3 hisn't a valid option for ATC due to fact it's a bastard to release and the taper can't handle high rpm, and then there's the toolholders. They will all need to be custom made then balanced for high RPM all very time consuming requiring high precision machines to do it correctly. Same goes for R8.!!
The only way to realisticly do ATC with these tapers is like the Tormach system where just one large collet is permanently in the spindle and custom tool holders made and has can be seen with Tormach they can't achieve high RPM due to balance issues. So to me who idealy wants 15K rpm area thats a non starter.

Like I said earlier in the thread I belive it would be very easy to throw lots of money at building one then still end up with a less than ideal result.? Not a route I'd like or want to take when I know for sure I can have full ATC with industry tapers, thru coolant etc for just less than a grand.!! . . . YES £1000 is lot of money but in the real spindle world it's peanuts.!!!!

This is my Ideal spindle
ATC
20K RPM
BT40 1st choice, BT30 2nd choice both ball grippers.
5KW if inc motor 50-20K rpm
thru coolant
encoder option (I want to ridged Tap)

Yes I know want a lot but that would make me a happy chappie if could happen for £1500 with motor or sub £1000 without.? Honestly dont think it's possible for less than 2K but can live in hope.!!