QTR 86 VEVOR 2200W Jack Hammer 

@12:50. The piston is riding on that oil so it doesn't make contact with the aluminum body, just like a car motor piston. Nice to see the breakdown.

Thanks for the demo Robert, not your the fist RU-vidr that brakes down equipment and shows what and how it's made, and how it works. For my use I better look for an upper end like mikitak, bosh or craftsman jack hammers.

Interesting review Robert, thank you.

Good honest review, thanks.

Robert when you do hardest testing on castings you have to grind a 1/16 " deep pad to get below the chilled surface on the casting which happens during the pouring operation. It can be like glass some times , a better result would have been on the machined part . ( 50 years in Foundry game o my backs sore. ) Christopher from Down Under

Great review, thanks!

What's a little pipes to put the tools in Little bungee cords around it you can wheel it up with put it in the truck and head out 2nd part of my 1st statement

Just bought ours, to break up Limestone Rocks..I’m praying that it works as well as with Concrete!

I made a motor speed controller to get the best hammer power and put a bit of gress/oil in the bit holder and the thing runs very well

I wouldn't got one of the metal Harbor freight hand trucks well do the pay gone there and then put all the implements around it Thanks for the video

Thank you for the review, i wish someone would compare the 2200w vs the 3500w because just saying one is stronger than the other is not really good enough

I have a Harbor freight jackhammer that is electric, I bought it for one small job. The bits all seem to be made out of cheese, but it took standard fittings so I was able to get quality bits for it. This is before the days of Bauer, it's a very strong smelling orange plastic from Chicago electric. It's a horribly designed tool with awful balance but I have to admit, it's going on 10 years and while it has never worked what I might call very well, it's also never let me down. Not something I reach for very often, but a pretty surprising lifespan for Harbor freight. I'm completely new to this company vevor but I've seen a handful of tools from them now that make me assume they are on a par with Harbor freight's higher-end lines

How many ounces of oil do you add without taking the cover apart?

Is it not true that small size internal combustion engines 50-150cc have aluminium cylinder where an aluminium piston runs with steel rings? or all engines are steel lined?

What kind of grease did you add?

What parts did you apply the grease to ? Just ordered one .

nice video but your audio bit's cant here you. its been dowing down hill for some time I hate to say something about it but hope this helps you out

The manual says not to use too much oil or it could damage the product. The manual does not say how much oil to put in it. Did you figure that out? And is the site glass supposed to be viewed when it is in a vertical position? This looks like a great product, but the user manual is not very informative.

How many amp circuit?

It seems if I post about an orange local hardware store, my comments get scrubbed.. I actually bought one to pour support for bigger machines! Have at you! However. If you buy the XtremePowerUs label from *redacted* you get warranty for months, no questions asked.

I suppose you could custom make the world's least convenient biax scraper?

Lol, i bet vevor didn't see this coming.

Its a copy after a Hitachi jack hammer but the chinese made it even more powerful. Lately even Bosch got to steal the design for their newest, brushless jack hammers. Its extremely cheap but it worth every penny. A friend has one for about 10 years or so and used it to rral barbarian work and borrowed to all his friends. Only had to replace the brushes. Its a professional tool except it lacks the name brand.

You dont need to press it so hard

This country uses 60 Hz not 50Hz. Did they make an appropriate model? I know you can't complain when they are giving you stuff.

Cheapo brand, bought a air over hydraulic 20 ton bottle jack for our shop press, was filled with brake fluid not hydraulic fluid and plenty of grit from manufacturing, had to end up taking it apart and clean it!!! Won't be buying this brand of anything again!

I used cheap walmart tranny fluid for mine and it worked great, don't be fooled into spending a ton on hydraulic fluid !!!