They make SDS-Plus bits too, called BullDog I think. High quality bits will definitely cost less over time, not only with heat problems but with breakage and work speed. I was able to find a really beefy Ryobi one with a cord on Amazon for about $65. Get a rotary hammer with an SDS-Plus bit. Other posters have mentioned this, and I agree: If you are drilling concrete, By the time your spare gets hot, your first will have cooled off. If your bits are still overheating, then keep a spare handy so you can switch to it. What Do You Need For Drilling Into Concrete Step 1: Mark your hole location with a sharpie Step 2: Load your masonry drill bit into your power drill Step. Hammer at a lower speed so you can more easily monitor dust extraction, obstacles, tool angle, heat buildup, etc.Slowly squeeze the drills trigger and start drilling into the concrete. Extract bit, blow out the hole, continue. Firmly grip your drill and align it perpendicular to what youre drilling into. Sometimes it gets caught halfway up the hole and can cause the bit to rub or break against the pressure buildup. Make sure the dust is being extracted continuously.If the top half of your hole was created with a bent bit, then straightening it will cause the bit to rub on the sides and overheat. Keep the bit straight at all times, and make sure the tool's angle remains consistent.Letting your tool sit there a wail away at it may eventually help but most likely, your bit will overheat and its tip will come out looking like a pancake. If you hit a material that is too hard for your tool's hammer to break, like a big piece of stone in a concrete slab, consider starting another hole (or buying a tool with a stronger hammer). The pressure you apply should be just enough to keep the bit from jumping away from the work area. The pressure that affects the work is coming from the hammer action, not from you.
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