A look at some Chinese inserts
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- Опубліковано 27 сер 2024
- I take a look at the new and cheap Chinese inserts, that I used during the making of the chuck backstop for my vintage lathe
Want to support my video efforts, buy some shit through my Ebay or Banggood affiliated links below.
stuff I used in this video.
CCMT inserts: ebay.to/2MHIqz3
DCMT inserts: www.banggood.c...
Microscope: www.banggood.c...
Rolingmetal community tab: bit.ly/2TkLrH0
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Hello RM. Thank you for the video. Interesting to see how the cheap knock-offs stand up and the joke of a coating. Has always I Liked,Shared,Added to playlists. All my best.
Thank you for show us magnified views of Chinese inserts. You've convinced me to purchase a digital microscope, and that I should avoid cheap inserts. I was astonished with the pathetic coatings and bluntness of Blue Nano inserts.
Everyone should have a digital microscope. They are fun and informative :) The blue nano do seem to be rather blunt but they might be good (last longer) for roughing.
is the paint coming off or you just marking it like a pencil?
I believe a little bit of something is coming off
If the coating is actually doing the cutting, it will be applied over some softer (shock resistant) grade of carbide. If the coating is merely cosmetic, then the bits could be honed and reused like brazed carbide. I would like to see a cross section, but a functional coating might only be 2-3 microns thick, hard to discern on a light microscope.
Thank you for this valuable research!
The coating is there to lessen the abrasive wear from metal sliding over it, atleast that's one of the reasons
when I rub of the coating a light grey surface does appear. But there is no real force needed to rub of the yellow color
Two videos back to back 👍
shorter videos are easier to edit on my old computer
Olá :p love your videos.. i work with CNC and lathe all day long and i think you should try some brand name inserts... I'm pretty sure you Will feel the Diference even in a Chinese lathe 👌 bangood is probably not the best shopping place for thoose kind of things ...
almost all self-respecting amateurs probably use the Chinese inserts. Others are so damn expensive
@@Rolingmetal True, i have something like a hobby machine at my house and i always look for inexpensive tools but i can assure you that the price of medium quality tools is well worth it.. it saves you a lot on the long run simply because they last longer and produce better results! I had a Chinese carbide endmill set that lasted me like 2 or 3 parts in soft steel and then i paid something like 30 euros for one 12mm endmill (the cost of the Chinese set) and the frecking thing is still going after something like 30-35 parts in soft steel. You wouldn't imagine the price of some endmills that my company purchases and what i make them do at work ahahah
I think you started something... Now you're going to have to test other inserts... Nice job!
Maybe I should come up with a standard test method to compare these cheap Chinese inserts.
That looks like chinese paint, not a chemical embedded coating.
About the drill, I would clean the tip up to one inch with thinners and paint it a light grey undercoat, drill again just a bit and see where it rubbs or remove the paint, maybe the sharp pointy lines of the drillbit is not touching the work properly to cut.
G’day RM, I must be missing something here, if you can scratch off the coating with a pointy thing by hand, what is the point of the coating, maybe to help slide off the chip after it has been cut??? I’d like to see the pointy end of a HSS tool after some use.
Microscope sure is useful. Cheers
Peter
great video ty
Hey man, What do you suggest for insert for a smooth finish on aluminium and what are the best speeds? I seem to get rough turns with everything I try. Carbide inserts, Braised carbide tools. Don't have HSS tool steel. Just want to turn a smooth piece of aluminium. Steel I don't do too bad with, well mild steel so far. Any suggestions would be great help :)
Try these, they are made for aluminium:
www.ebay.com/itm/CCGT060204-AK-H01-CCGT21-51-Carbide-inserts-Cutter-blade-CCMT0602-for-Aluminum/153417322751?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
They are a lot sharper than regular finish. WD40 helps prevent the chips from binding to the insert. Good luck
I have a bunch of old American made brazed carbide tool bits. They last way longer than any china insert that I ever had. And cut with even the lightest tool pressure. Unlike the inserts. Which leave poor finishes with light cuts.
Got to get the right type of inserts, they come in all shapes and colors
the cheap brazed carbide tools I have chip by looking at them.
Chinese Coating is Paint😅😅😅
Good look at cheap ass inserts . Cheers .
thanks Max
See now the problem is you ordered grape and 🍌 flavored pointy bits. Next time go with the unflavored bits.
I think uncoated Chinese carbide might works just as well
Well.... after a few of your videos re these Chinesium inserts, I ordered a few different types....
What are you doing with these things?? Sure, they are far from suitable for regular industrial use... but I don't get anything like the damages you show, after using them (and making them hog some serious metal)
Could it be that you use to low feed and rpm speeds? Maybe there is an oscillation in your machine?
It's odd that we get such different results.
I will agree wholeheartedly that ' blue Nano' equals Blue Bullshit...It doesn't seem to be much more that a badly applied coat of paint!
I really think that with your older machines (and the subsequently lower RPM's) you would have better finishes and a better all-round result, if you'd use regular HSS...
It would be interesting to see, what would happen to a proper insert on your machines (Kennametal or some such brand)...
Toodles
Paddy
perhaps it's because I usually don't disengage the insert from the workpiece
Well, that isn't a good idea at any rate...but you'd get breakout at the tip... you seem to have surface damage on the top of the insert mainly (as far as I can see on the videos)
My first idea would stay : feeds, speeds and power. These inserts are made to hog off metal at a high speed, decent DOC and for that you need some serious wattage.
Here and there there is a Chinese insert to be had that works ok-ish.
That said, it costs 10% of a decent one, and removes 5% of the metal ...so the math is easy...
Toodles!
Paddy
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