Appropriate Drill Size for Noname Concrete Anchors: Hole Diameter & Clean Fit Issues

Hello,
I bought anchors, unfortunately noname. Attached picture. The question is - what drill to drill in concrete for these anchors. If fi 16, this answer will not help me, because after drilling a hole with a NEW fi 16 drill, the anchor cannot be driven into this hole. It's just too tight a fit. I also immediately answer that the hole is absolutely clean, because it has been blown with compressed air. If the anchor had a name, I'd call the manufacturer.
I made the dimensions shown in the drawing with a caliper.

Regards

How is that "no"? This anchor is driven in by pounding it with a hammer - the sleeves are to be wedged in the hole. Maybe your drill bit is "undersized" - because the hole will always be slightly larger than the diameter of the drill bit.

Now that you have measured the diameter of the anchor, now measure the diameter of the drill bit. I also had that drill with two widia blades was not 16 mm and when I bought a 16 mm with 4 blades, the anchors went in slightly (12 cm long).

You may need to loosen it up a bit.

ta_tar wrote:

Now that you have measured the diameter of the anchor, now measure the diameter of the drill bit. I also had that drill with two widia blades was not 16 mm and when I bought a 16 mm with 4 blades, the anchors went in slightly (12 cm long).

Rather, the drill has a habit of breaking up the hole.

I have read all the tips. Thank you for your willingness to help. Unfortunately, as I wrote at the beginning of this thread, after drilling a hole in concrete with a drill of the same diameter as the cone at the end of the screw and sleeve (16mm), the screw cannot be driven into the hole. If the diameter of the drill, as you write, is not to be larger, then after work. I can see several reasons. First, the hole drilled in concrete with a widium bit is not centric; it would be centric if it was lace. The drill (Hilti) as I wrote is new. And so what if two widium widie plates on its working part punch a hole exactly fi 16, since in the further, non-working part, the drill bit has a diameter of fi 14. Concrete is a mixture of cement and gravel, so the drill moves along the line of least resistance, practically without guidance, as it is in a drill for steel or a bit - hence the lack of axiality. Secondly, perhaps this anchor, beaten with a 5kg hammer, would fit into the hole, but it would have to be made of a better material. Purchased anchors, after a few hammer blows, loosen the screw and thus destroy the thread. Thirdly, the sleeves that are to finally tighten the anchor are made of such soft steel that they almost become a harmonica when driving the screw. All in all, I think these anchors are absolute crap.
That would be enough, I think you have to spend a few zlotys more and buy similar branded or chemical anchors.
Regards

Up to what point do you manage to hammer in the anchors? Is the nut loose or tight when hammering in? Do you hit the hammer directly on the anchor or do you hit through the "wood"?

After all, you can move the drill in the hole back and forth, reaming it by a few mm.
The anchor may be crap, but after tightening it works to stretch (bolt) and it should be the strongest.

These anchors are quite good anchors, you just need to use the right assembly. The most important thing is the cleanliness of the hole so that the first sleeve does not resist and "reaches" to the very bottom. Because when the first sleeve is blocked, the second sleeve "spreads" on it when hammering in and everything is blocked.
These are double-strut anchors and with proper installation, they "hold" in concrete quite well, because they are practically anchors intended for concrete.

https://www.sukces-zamocowania.pl/sklep/kateg...twy_SLR_-_Srubowy_Lacznik_Rozporowy_-637.html

Mounting method.

http://test.arvex.pl/com_product_info/task,product_view/catid,76/gid,9/pid,126/Itemid,71/