Hex Point Chisel (17x280)

It is a point chisel, and the choice between a point and a flat is a real one that changes how fast you get through material. A point concentrates the entire blow of the machine into a single small area, which generates enormous local pressure. That is what you want for breaking rather than cutting: starting a hole in a slab, breaking up concrete and masonry from the middle outward, cracking through a thick section, punching through a wall. Concrete fails in tension around a concentrated point, so the material breaks apart in a spreading pattern of cracks rather than being ground away. Trying to break a slab with a flat chisel is slow, because a flat spreads the same energy over a wider area and never reaches the pressure needed to start the fracture.

The technique that follows from that is worth knowing, because it is where most time is wasted. Work from a free edge and let each blow break material away towards it. Punching repeatedly into the middle of a large unbroken slab simply buries the point — the surrounding concrete is confined and has nowhere to go, so it absorbs the energy instead of cracking. Start at an edge or start a hole and work outwards, and the same machine breaks two or three times as much in the same hour.

The material is chrome alloy steel, heat treated and tempered to over HRC 50, with a matt finish. That hardness is higher than a hammer face and appropriately so — this is a cutting and penetrating tool struck by a machine rather than a face that strikes, and it needs to hold its point against concrete and stone rather than deform.

The buyers are demolition and breaking contractors, civil and groundworks crews, building contractors on alteration and renovation work, plant hire operators, and hardware dealers supplying contractors.

Some working practice. Let the machine do the work rather than leaning on it — a rotary breaker needs the chisel free to recoil, and pushing hard actually slows it down. Do not lever with the chisel to prise material off; these are struck tools, not crowbars, and a chisel bent in a tool holder is finished and can damage the holder. Keep the shank clean and greased so it slides properly in the holder. Re-sharpen the point when it goes dull, since a blunt point wastes machine time. And confirm your breaker takes a 17mm hex before ordering — message us on WhatsApp with the model and we will check it for you.