Chinese Spindles

[Jonathan]

But i want two, and overall we're looking at five so maybe we can get this sorted and get 5 universal bt30 spindle sections made, and configure the case and bearings to suit our own requirements. This way we all get what we want and the expensive ground spindle can be made for us.

I'm all for that, but things like this gentlemen's experience worry me:

http://www.cnczone.com/forums/vertic...roject-13.html

The other problem is the cost of the super-precision bearings which are a necessity for the sorts of speeds we're after. The place I posted in post #101 may help there.

I bought plenty of 35mm EN19 steel for precisely this project...

As i stated earlier in the thread i want as much flexability as possible which meant buying a seperate motor, 9k is to high for the lower limit.

9k is almost certainly not the lower limit, I bet it is 9k upper limit with 'standard' bearings and 12k upper limit with the better ones.
I was going by what you said here with regards to including a motor:

I bet once you pass 10k the price goes up as much as the rpm..... lol but it would be nice if it had a motor on from where i sit, as i will have to buy one anyhow and im sure that wont be cheap.

But if you're prepared to do the extra work to attach your own motor then that is definitely the best solution since, as you said, you require useful power at 1000rpm.