Hammer drills are designed specifically to bore holes through concrete, cinder block and brick. Hammer out the flat edge to make the bevels. Geologists choose one or two appropriate hammers before setting out, considering the type of rock they expect that day. The two sides of the head are quite distinct from each other in appearance: While a "mason's" or brick hammer is designed for cleanly breaking bricks, it can also be used to break rocks, hammer concrete, split pavers, drive stakes, and scrape dried cement. Interested in cutting masonry like concrete flags and bricks? The bit is actually breaking the rock, not cutting it like a sharp twist drill does. Been in the trades 25 years, all heavy and commercial work. Sharpening removes material, so that would shorten the life. This material can splinter, too, especially as the metal grows deformed with heavy use. © Copyright 2020 Hearst Communications, Inc. Medioimages/Photodisc/Photodisc/Getty Images. The hammer head is suitable for light chisel work. I have used and abused as many bits as seen in every suppliers phlanax, trust me, you wear them down and chuck them, or else I'd an asss and say that Bosch works for ever. The rock you're addressing will behave best under a hammer of the right weight, handle length and head design. A dust mask or respirator is recommended to avoid breathing the dust created by drilling or cutting through concrete, brick and other masonry products. He wants more MPG for his $50-60 investment. This type of drill is capable of working in hammer only mode, which is invaluable when you have to break or chip through aggregate. A grinder or a drill-sharpening machine help bring that worn bit back to its original usable condition. Stand where a slip won't hurt you. Most guys use their roto-hammer everyday. some shops that I worked for would send their larger bits out for new tips. There is no substitute for a real ( REAL) sharpening on a tip of which the OP was referring to..and TheDrill Doctor is NOT a way to go about it. Premium A-to-Z Microsoft Excel Training Bundle, What's New in iOS 14? Who pays for your bits, you or your employer? Hold the bit in a sharpening jig and wear heavy work gloves and eye protection. Pick up a 4" diamond wheel and 1/4" arbor to fit a drill. You think a dull bit is as good as a sharp one? Hammer no more than necessary. Most "stone hammers" are for just pounding on the stone. Proper chisels are made of softer metal. That "chisel" end is what would then "cut" the stone. Don't take chances.