Hilti’s new hollow hammer drill bits help lead to cleaner holes in brick, block, and cement with less fuss and effort.
After drilling a hole in brick, block, or cement, workers will often have to clear it of loose dust before an anchor can be properly seated. This can be done by placing a vacuum hose over smaller holes or sticking a blower or compressed air straw inside deeper ones.
With one of these hollow drill bits, you simply attach a vacuum hose to the port near the mounting point and go about your boring business. Dust will be extracted from within each hole as they are drilled. Hilti claims that these bits not only improve hole-cleaning efficiency but also lead to safer anchor installation.
We can understand how these bits could boost the efficiency of the whole drilling-cleaning-anchoring process, but can these bits improve anchor strength and safety? Possibly, but that depends on too many things for us to judge for certain.
These new hollow hammer drill bits will be available in a multitude of sizes with SDS Plus (TE-CD) and SDS Max (TE-YD) connection shanks. The hollow channel in each bit extends from the tip to the built-in vacuum port positioned just ahead of the mounting point.
There’s no word as to how these hollow bits compare to conventional rotary hammer bits in terms of strength, durability, and drilling performance, but we don’t expect for there to be significant differences.
It looks to me that the carbide tip is more robustly built than typical bits, perhaps to compensate, and the absence of helical flutes might mean a thicker shank diameter for extra support.
Here’s a short and cutesy video from Hilti that shows how these bits work: