Thread: Chinese Spindles
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21-06-2012 #101
For that amount of money I'd want to be getting more than 12000rpm. 18000rpm would be much better, but it seems toolholders which are sufficiently well balanced for that speed are rare and expensive.
This lot look worth investigating:
http://www.alibaba.com/product-gs/54...g_Machine.html
http://www.alibaba.com/product-gs/53...otor_BT30.html
http://www.alibaba.com/product-gs/53...dle_Motor.html
http://www.alibaba.com/product-gs/46..._with_atc.html
http://www.alibaba.com/product-gs/36...dle_Motor.html
In particular the first one - 1130-24Z or 1130-16Z. The 24Z (24krpm) has 35mm bore bearings, but the 16Z (18krpm) has 40mm bore thin section bearings. Need to investigate which is strongest. The one you have a quote for uses 45mm bore bearings, so it would be more rigid, but any of these will be more than the standard 2.2kw ER20 spindles which only use 25mm bearings. If they can't wind the -24Z for 220V then it'll have to be the 16Z spindle anyway.
http://lyzyzc.en.alibaba.com/product...NS7CE1DDL.html
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21-06-2012 #102
First of all i dont really need 18k and None of the links you put on there are quotes, but just guide prices, get some quotes and see what you get, the item i have posted is without motor, i am awaiting updated paperwork for that, and is new unlike some of the links you have provided, they are used/refurbished items and as such very overpriced, i want BT30 ATC 12k rpm max (just for flexability) so if you can go cheaper price new not used, then post the quotes and i will contact them and may even buy one..or more
Rick
To Beat we have
12k rpm spindle cartridge
BT30 ATC
$1522 = £976.52Last edited by Ricardoco; 21-06-2012 at 08:46 PM.
Always bear in mind that your own resolution to succeed is more important than any other - Abe Lincoln
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21-06-2012 #103
Oh just noticed three of your links are for Ms Xing....lol dont believe all you read will you
Here was The quote she gave me...
"Elizabeth Xing:(02:14:19):
3.2 kw BT30 18000rpm spindle
motor is 110mm, OK?
Rick:(02:15:35):
ok 380v
spindle
Elizabeth Xing:(02:17:26):
2199 dollars per piece, not
including the pull stud and toolholder.
Sorry, 2177 dollars per
piece.
Reply View
Context
Rick:(02:18:10):
and
220v
Elizabeth Xing:(02:18:20):
the
same.
Rick:(02:18:43):
Ok and what price for shipping
to UK
Elizabeth Xing:(02:19:31):
Shipped by DHL, 249
dollars.Package weight 23
kg.
Any questions???
Always bear in mind that your own resolution to succeed is more important than any other - Abe Lincoln
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21-06-2012 #104
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21-06-2012 #105
It is like those hotel rooms starting at £19 when you get there they are all booked out, Every time..
I asked her what spec were her spindles for $1920, and she has none left and it is only a guide price. and some of her spindles fall outside the top end as well..
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. As you stated earlier the motors have no power at the lower speed, I will be gearing down to 2k on spindle with an approx 0-6k motor and up to 10k if need be i will be using pulleys for this, with a little left in reserve.
take a look at the pictures you cant miss it.. when i asked her if they were "used" she just said "some" Its all too easy to blag and blame the language barrier when in fact every word is understood perfectly..
.
But thanks anyhow JonathanAlways bear in mind that your own resolution to succeed is more important than any other - Abe Lincoln
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21-06-2012 #106
I've had a thought. We discounted making these spindles as it would be too much hassle making a one off. 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.
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21-06-2012 #107
anybody else want to jump on
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21-06-2012 #108
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21-06-2012 #109
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...
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:
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.
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21-06-2012 #110
i'm going to have 2 pole 1.5hp 3 phase motors on mine, and i fancy drilling through the motor spindle and attaching the atc actuator on the top of the motor so everything is in line
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