findmall 2" Boring Head R8 Shank Boring Tool Set, 9pcs 1/2" Carbide Boring Bar Set Milling Fit for Milling Machine, Thread 7/16-20"

Really good quality for the low price. The slot in the R8 shank required some deburring and the carbide cutter required some honing but other than that it cut nicely right out of the box (see video). The machining on the head itself is exceptional. My mini mill is a Sieg X2 and as can be seen in the video the cutting vibration is minimal.

Loved it. Worked just as good or maybe better then the more expensive name brand ones.

For the money spent, good value. I can hit .0005 with it. Boring bars kinda leave a bit to be desired. Believe the carbide to be C2.. Most inexpensive you can get. Luckily I am blessed with a tool & cutter grinder to sharpen and profile them. You definitely cannot use them as is. The case is pretty well junk. But the boring head and R8 shank is pretty well made.

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!

Huh, for the price this is a very nice boring head kit. I bought this for a friend, who is just getting into the hobby, and I wanted to make sure that it will do the job. So… Over all the head is very well made. The machining is clean with no burrs and is chamfered. It does adjust easily and there is no slop in the dovetail. There is about .003 backlash in the adjustment, but that is to be expected. The one thing I do not like is that the dial counts down versus up when adjusting for the cut. However, the adjustments are accurate to .001. When making your adjustments keep in mind that the head is set up for indirect reading. The bars are a different story. I’ve never been a big fan of braze-on carbide, but these do cut clean after being dressed. I highly recommend this set for the hobby shop!

The boring head worked well once I cleaned up the small burrs on the dovetail that bound up. It might not fit in a brand new spindle as the groove was a little under the 0.156 inch specification. It didn't fit my machine until I cleaned up the little burrs on the edges of the groove. The cutters need at a minimum to have side clearance ground into the carbide. As delivered the only way to have side clearance is to set the cutter in the head with lots of negative rake angle, which does not cut well. I used a Dremel tool with a silicon carbide grinding stone (85422) to grind side clearance and rake angle into the cutters. Having read other reviews I got what I expected.

Nice set for the money!

Just what I ordered will use this seller again

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

The boring head itself is OK quality and the selection of different lengths and sizes of cutters is nice. However, the cutter geometry of the carbide itself is poor. Unless you have a means of sharpening carbide, expect poor cut quality and chatter.

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.