Metal Lathe Cutting Tools - 1/2" and 5/8" Threading Tool Holder Boring Bars with 10pcs Indexable Carbide Inserts 16IR 16ER for Turning Threading Boring Lathe Cutting

I have the 5/8 shank with the 11 inserts and so far it's done a great job, the inserts are cutting good and leaving a nice finish, put me down for 5 stars 👍

I bought the 3 piece set of groove/parting tools with 10 2mm inserts. They are quite good. I had no trouble parting stainless steel which tends to be "sticky". The top title clearly says 5/8" shanks, (which I missed) but the smaller title says 1/2" and 5/8". They are all 5/8" shanks which will not fit a standard AXA 250-101 holder. Luckily I had a couple 250-101T holders which will accommodate a 5/8" shank. The internal tool has flats but will also not fit a 1/2" holder. Worked fine on a 12" lathe. You might have trouble getting them on center for a smaller lathe. And for sure the 5/8" shanks are plenty stiff.

As in the headline, I didn't expect brand-name quality at this price, but okay for my hobby shop.The description is misleading in two ways. The pictures seem to show inserts mounted in the holders and additional inserts in a small case. Actually the holders were empty and a single insert was supplied for each holder. Also, all the tools are "half inch" (actually 12 mm) except the trigon holder which is "five-eights" (actually 16 mm). That one didn't fit the slots in my 0XA tool holders, so I had to mill it down to 12 mm. Not useful if you don't have access to a mill.As another reviewer noted, the diamond insert didn't fit the right-hand holder. The insert hit the back of the relief without aligning with its retention screw. I was able to mill out the relief with a 1/8 inch end mill and then the insert aligned with the hole but the fit in the holder was sloppy. I think it was intended for a different radius insert.Edit: Actually the insert fit fine, I inserted it in the wrong holder. Fortunately my mod didn't affect the seating of the correct (threading) insert. I have increased my rating to four stars.

My only issue ( and not a big one by any stretch) is I would like a slightly longer shank on the tool for stability when I have to extend the tool out of the qctp for access around a bull nose live center. So far, I've only chipped one insert end, & that was 100% operating error

For noob like me the inserts holding like a charm. It was my first tools and my first cut. As you can see even with 0 experience you can practice a lot and not breaking the bank or trying to figure out angle on hss blanks. I think for hobbyists it’s excellent choice. I’ll definitely buy more once those breaks.

Seems to work good and the price is great.

Have not actually bored anything yet,but the workmanship of the boring bars looks excellent! Very nice.

I installed the first holder in the lathe and tried a very light cut at hand feet speeds and two of the inserts shattered within minutes. Plus the holders did not have sufficient clearance for the inserts they provided. Save your money and buy something else.

Right and left tools seem ok for light work but the internal tool leaves much to be desired. The insert seat does not maintain contact with the insert for the length of the insert and does not provide support under the cutting edge where it's most needed.

Siempre cortaran mejor las herramientas con insertos de carburo