$500 CNC Machine Cuts STEEL?? Sainsmart 3020 Pro Ultra Review

Comments · 165

• DU

  @duevendel7301 · 11 months ago (edited)

  My suggestion for steel, even if nobody asked but maybe helps someone, is to use a smaller end mill, e.g. 4 mm. Then take a much deeper depth of cut, about 6 mm, but only a stepover of around 7%. Use a cutting speed (vc) of about 250 and a feed per tooth of 0.08 mm. This approach is called HSC (High-Speed Cutting). Compared with high-power cutting, you run much higher speeds and feeds but with a much smaller stepover. This reduces the load on the machine mechanics and should result in less vibration.

  169

• IS

  @israelbrowne1090 · 9 months ago

  the fact this thing cuts steel at all for 500 with precision is phenomenal. added to wishlist

  14

• QO

  @qozia1370 · 11 months ago

  I absolutely love this video! Dude you are an amazing reviewer!<br><br>Absolutely amazing you tested even the limits of the machine.<br><br>Such an honest review!!

  5

• GU

  @gulch1969 · 1 year ago (edited)

  Get an end mill that has a corner radius. Like a .5mm rad. &nbsp;And stub that up into the collet as much as you can. You have it sticking out a lot farther than needed. This causes chatter and vibration. Then re-run your steel test. I guarantee the results will be much better. &nbsp;I&apos;ve been running cnc mills for 30 years cutting all kinds of steels.

  100

• RU

  @RustyKombi · 8 months ago

  My first watch of your video testing this machine. Luvved your work &amp; thank you. Awesome machine.

• ST

  @stevenrutledge · 1 year ago

  Thank you for the video.

  1

• DA

  @danieleconserva279 · 11 months ago (edited)

  At this price point it&apos;s a steal. If you try and buy the parts to build it, you probably end up spending more. I&apos;m really tempted! The 710 watt spindle is just your regular old Makita trimmer, which now has been copied by many brands. I&apos;ve got a very nice version of it at lidl, made by parkside for 49 bucks.

  15

• JM

  @JMLRecording · 6 months ago

  pastica too?? Awesom-a!

• CH

  @chotmine2697 · 9 months ago

  I&apos;m wondering if it can cut stainless steel.

  5

• HE

  @HeavenlyPalace-Y2K · 4 months ago

  Aren&apos;t you going to showcase the &quot;final project&quot;? Such as how it shoots :)

• SP

  @Space_Watcher_M31 · 1 year ago

  Can you try to make a mini engine?? Pls.

  1

• RO

  @ronpintx · 1 year ago

  I hope it will cut a 10mm slot in some 1/8 &nbsp;steele flat-bar.1/8 &nbsp;2-fluted end mill?