Thread: Chinese Spindles
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
BT40 1st choice, BT30 2nd choice both ball grippers.
5KW if inc motor 50-20K rpm
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.!!
Jazz do you mind if i ask why you need such high spindle speed?Always bear in mind that your own resolution to succeed is more important than any other - Abe Lincoln
On the flipside I want sub 1000rpm for large fly cutters, boreing, drilling etc and full control for tapping.
Once you have all this the next failing is going to be the build of the existing machine.
Who's existing machine can carry a BT40 spindle with 5Kw motor ? The high frequency spindles can't hack the whole range as below 8K they are useless on torque unless you do like the big boys and design for minimum speed.
That they do is say to themselves I need 1K minimum speed but at 1K they only have say 10% of torque available of the motor so they up the Kw of the motor just so minimum speed is covered.
Look at some of the modern 5 axis machines with 30Kw spindles, why do you need 30Kw when you never rum greater than 20mm cutters ?
It's only so there is torque available at lower speeds. Even a large motor and inverter is peanuts compared to designing and building a gearbox that can run at 20,000 rpm.
My nephews Biesse router has all you need except thu coolant and there is no way that head will fit on any of the machines I have seen on this site.
If you really need all this then forget the £1500 spindle with motor and buy a S/H BiesseJohn S -
a gearbox to cope with 20k, i'll give Lewis or Jensen a ring i'm sure they'll have one spare.
I thought of making a spindle, but the cost of these spindles makes it pointless.
My needs are for a milling machine rather than a router, so i have no probs on the weight or size. In fact this is replacing a bridgeport type head on a Denford Quatro so i have plenty of room.
Ricardoco, if you fancy one i have two..
it'll end up being a single phase VMC, with 600 x 300 x 500 axis movement (x y z).
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