findmall 9pcs 2" Boring Head R8 Shank Boring Tool Set 1/2" Carbide Boring Bar Set Milling Fit for Milling Machine

I am not a machinist. I play around at home with lathe and cheap mill. I bought this to bore a hole in a pitman arm at 2.100". It worked great and left an accurate and uniform hole. I'm sure there is much better out there, but I'm not making airplane parts either. The cutters did need sharpening and aren't the best, but they work. The head itself is surprisingly well made for the price. Seemed to pretty accurate to the .001". Again, I don't doubt a professional would think otherwise, but I'm sure their parts also cost much more than this thing. I would buy it again and it has made it's money back already!

For the price it’s great, my only complaint is that I had to sharpen the boring bar carbide. I have used it about 5 times with no issues. Great boring head for the money.

The head was just the size I needed, the accuracy of the dial is dead on. And the boring bars were/are sharp. For my money it was a great buy.

Good price fast service. works as advertised....

Good addition to your mill tooling .

Works good for the price. You have to sharpen the brazed carbide boring bars first. I'm only a hobby machinist. I didn't know that. I learned about "green" silicone carbide grinding wheels and things have changed. The boring bars are pretty nice but...if you don't sharpen them first they will not work. Also my regular grinding wheel wouldn't sharpen the carbide part. If you get a green wheel they will sharpen and work awesome. Sharpening with a diamond stone by hand didn't work for me. I spent a long time trying and finally bought the $45 ish dollar grinding wheel.

Works great on my milling machine

This is the yellow box boring unit seen on the internet. The boring head itself is quite good, well made, packaged and finished. The included cutters were made by someone who does not know what they are making. The carbide brazed inserts were way too thick and poorly fitted to the base tool. The steel base is machined wrong to make matters worse. This makes the cutter rub on the material being cut rather cutting into it, causing heat rather than a cut, and a mess of the part made so far. I suspect these cutters are everywhere on the net making trusting buying any in doubt. Most of these type tools are contracted, so even if I get a good set, that could change in an instant depending on who got the contract. You might get it to work if you have a green wheel grinder and grind away MOST of the carbide. Good luck

Used to bore one hole so far. Quality seems fine. It worked well. Finish was a little rough. Will spend some time on tool bits to improve finish.

Las barras que vienen incluidas no son de la mejor calidad, de ahí en fuera el producto funciona súper bien