[keysd]

Is anyone with a Chinese spindle measuring run-out anywhere close the the .005mm that most ebay sellers spec? I ordered a 2.2KW spindle on ebay, and the runout is about .002in(.05mm) which is 10 times the advertised run-out. I want to run end mills smaller than .062 so 2 thou of run-out is not going to work.

Is there anywhere to purchase a decent spindle without spending $1500 and up?

[jalessi]

Keysd,

Is it possible that you may have a bad collet?

Jeff...

[keysd]

I took the measurement on the inside of the spindle taper. I also repeated the test with an end mill and got similar results.

Testing the inside of mill/drill taper gave me about .0002. I was surprised and really pleased by that. I just put new bearings in it a few months ago.

[jalessi]

I took the measurement on the inside of the spindle taper. I also repeated the test with an end mill and got similar results.

Testing the inside of mill/drill taper gave me about .0002. I was surprised and really pleased by that. I just put new bearings in it a few months ago.

"Testing the inside of mill/drill taper gave me about .0002" Is this a typo?

[bhurts]

I had the same issue with my router. It had .002 inchs runout inside the taper. When I emailed the seller he said .005mm was maybe to much to expect/not possible. He then said it was for wood so it wouldn't matter anyways and that the runout would get better after running for a while. He then offered a 25.00 usd refund of the purchase price thinking that would fix things. I told him to keep his 25 dollars and stop giving bs excuses and lying about things getting better after running for awhile. This seller as far as I can tell is the most recommended one on this site. I took the spindle to work last weekend for a taper grind. Runout is .0002 inside the taper now. Only one of the collets I bought from the same seller was worth having. The rest are trash. I just received new ones from techniks and all is good. You will probably be alright with smaller then .062 endmills. Precise bits says runnout of 5-10% of diameter is acceptable so .001-.002 on a .02 endmill will work. That doesn't change the fact that you should have gotten what is advertised with no excuses.

Ben

[ger21]

That's the risk of buying from China. You pay half the price, but if you get the occasional bad one, you're screwed. The next best option is buying from a reseller like UGRA CNC, who will check the runout before shipping the spindle to you. But you'll pay twice as much for a real warranty and the knowledge that your spindle will be what it's supposed to be.

[tinacnc]

How Choose the suitable power of machine’s Spindle
Spindle’s working mode and Power are the important for the CNC router Machine. Generally, according to the working mode, spindle is divided into two kinds. One is Water-cooling spindle, the one is Air-cooling spindle. Choose the suitable spindle, it depends on your material and your country local weather’s Max temperature. Of course, the material (product) is more important.
1) If your material is soft kind, such as MDF, PVC, and you want do the smaller piece crafts, the lower power water cooling spindle , 2.2KW, 1.5KW is Ok.
2) If you want to produce the furniture or doors, engraving and cutting, we suggest you choose the Air-cooling spindles. When the material is solid wood, you’d better choose the spindle power over than 3.5KW

[bhurts]

You are right Gerry that's a risk you have to be willing to take. I new I could fix any runout issues so it wasn't to bad a risk. A Lot of people are just stuck with what they get and that sucks. I found a site that sells teknomotor spindles that are 2.7 hp for 891.00 USD. If I'd have found that earlier I would have bought that instead. I am still happy that I bought what I did. It is much better then the pc, Bosch, etc... routers I have been using. The one I bought is air cooled but still way quieter then any hand router I have ever used.

Ben

[keysd]

Opps, yes it is. I meant to say I tested the inside of the taper on my mill/drill which gave me about .0002 TIR. My mill drill is my cnc machine but is limited to 2000 rpm. I plan to add a separate high speed spindle for running smaller diameter end mills. After testing the runout on the Chinese spindle I decided to run the same test on the mill/drill just to compare.

"Testing the inside of mill/drill taper gave me about .0002" Is this a typo?

[keysd]

That's the risk of buying from China. You pay half the price, but if you get the occasional bad one, you're screwed. The next best option is buying from a reseller like UGRA CNC, who will check the runout before shipping the spindle to you. But you'll pay twice as much for a real warranty and the knowledge that your spindle will be what it's supposed to be.

I sent an email over to UGRA CNC today to inquire about buying a spindle from them. Sounds like a much better route. Fortunately the ebay seller has agreed to refund my money.

[keysd]

How Choose the suitable power of machine’s Spindle
Spindle’s working mode and Power are the important for the CNC router Machine. Generally, according to the working mode, spindle is divided into two kinds. One is Water-cooling spindle, the one is Air-cooling spindle. Choose the suitable spindle, it depends on your material and your country local weather’s Max temperature. Of course, the material (product) is more important.
1) If your material is soft kind, such as MDF, PVC, and you want do the smaller piece crafts, the lower power water cooling spindle , 2.2KW, 1.5KW is Ok.
2) If you want to produce the furniture or doors, engraving and cutting, we suggest you choose the Air-cooling spindles. When the material is solid wood, you’d better choose the spindle power over than 3.5KW

I plan on milling aluminum and brass with the high speed spindle, but only with small endmills doing light detail cuts. The majority of the roughing work will be done by my mill/drills 1hp 2000 rpm spindle. A 2.2KW water cooled should be ok for that kind or work shouldn't it?

[tinacnc]

roughing work A 2.2KW water cooled spindle is enough for your roughing work,air cooled spindle is better in the winter

[tinacnc]

yes ,air cooled is more convenient for your work

[Bob La Londe]

Ugra CNC shows videos of their runout test on their spindles. They cost a lot more though.