Hi! It's Alessio. I am planning to buy a small CNC milling machine for my hobby work on electric skateboard. I build mainly brushless motor and other stuffs that require aluminium most of the time. I have a small router that I have been using for milling aluminium, but as you can imagine is extremely inefficient in cutting metal. Of course it is was not made for that and it only allows me to remove 0.2mm of metal on the Z axis each time, leading to 5-6 hours milling operation instead of maybe 45 minutes. Therefore I decided to get a CNC mill too. I read about converting a good starting milling machine like BF20 (I am un EU, the only one I can get easy), but I am already saturated of project so if I can find a decent prebuilt one would be nice. I am already upgrade my router with new stepper motors, drives, breakout board and not willing to do it again. Of course open to modify the machine in the future. I have been searching locally but prices are really high and options limited. So I also looked to China CNC milling machine. Please before start to say is Chinese so is bad ecc, just think that most of the good CNC that we buy here are rebranded, I can post a machine that looks the same of BF20 or PM machine (https://www.alibaba.com/product-deta...1dac1053OCMBys). I already bought Chinese machine in the past and still up and running fine. If you do the right research you can find a good deal for the money. So here the list of the machine I have selected, unfortunately I can not find too much about it on the western website, except for the Sieg KX3 that seems a really nice machine, but a bit too expensive for me.

- TM13. The price is really tempting. Final price shipped is around 1550$. The machine looks sturdy and capable of what I need.
https://czxlt.en.alibaba.com/product...1cab3e5fkWjRdg

- Sumore SP2213, They same is the same of sieg KX3. They say same machine https://sumore-machine.en.alibaba.co...1cab3e5fkWjRdg
https://sumore-machine.en.alibaba.co...1b1b6529zsl5iJ

- the one I listed above that looks like the BF20, already CNC converted.
https://www.alibaba.com/product-deta...1dac1053OCMBys

- XK7113 similar to the TM13
https://www.alibaba.com/product-deta...494b42dey5fSQ1

As far I can see all these machines have ballscrews, linear rails. All are controlled with MAch3, whihc is fine since I use it already. What I am not really enthusiastic is the 400-500W spindle. Not sure it is enough, sounds small in my mind, but I came from the router world where I used 1.1Kw and 2.2Kw spindles.

I would really appreciate if you could help me decide. Better if you know something on these machines or you see something that has to be asked before purchase. There are some critical parts that do not sound good in the specs?

Thank you very much for the help!
Ciao ciao