As you cut, the protective covering will be pushed back, allowing more of the blade to contact the cinder block. Trace the mortar joints surrounding the blocks you wish to remove using a marker. Ensure that your work area is cleared of any unnecessary items so that you are not hindered while you are using the angle grinder. Don’t bother renting one unless you only have several feet of bad joints. This will not only ensure that the project is completed right, but also that it is done efficiently and safely. To make straight accurate cut with the angle grinder, you should mark the position of the line to cut with a straight edge. Get Price; Tools to Cut Cinder Blocks … Use an angle grinder to cut the straight vertical lines into the wall. Tape plastic sheets over furniture, fixtures and finishes to protect them from dust. Summary. Make multiple passes, making shallow cuts. She received her LEED accreditation from the U.S. Green Building Council in 2008 and is in the process of working towards an Architectural Hardware Consultant certification from the Door and Hardware Institute. And the window I want to install is five cinder blocks high. It is also prudent to wear a face mask to reduce the risk of breathing in any concrete dust. Consult a structural engineer for assistance with this task. Article Name. © Copyright 2020 Hearst Communications, Inc. Use a circular saw equipped with a masonry blade, or a concrete saw to cut through a block wall when adding a new door or window. Make sure that you keep both hands on the grinder when it is on and when you are using it on the concrete. Can I remove the blade from my tile cutter and attach it to the (5") variable-speed grinder that I have? Trying to figure what angle to set my saw to for the corners of a counter t... How to Modify Your Needle Nose Pliers into a Multi-Tool, Why Change the Speed on Your Angle Grinder. First and foremost, you’ll need an angle grinder with a 4 or 4-1/4 in. Watch Queue Queue Knock out the block using a sledge hammer once the surrounding mortar has been removed. Use a masonry saw with a diamond cutting blade or a metal chop saw with a dry cutting diamond blade. Step 4 Strike anywhere along the scored line using the chisel and a strong, swift hammer blow. Clean up the edges of the opening by chipping away any remaining mortar with a hammer and chisel. All information is provided "AS IS." For more fine tuning or for smaller cuts, I prefer the multi-tool. If you are working in an enclosed area, ensure that it is properly ventilated. Step 5 Lower the end of the blade to the cut-line, keeping the shoe of the saw against the cinder block. 4.5" concrete disc. One may also ask, what to use to cut retaining wall blocks? to this site, and use it for non-commercial use subject to our terms of use. Make the scored line about 1/8 inch deep. Cutting and Modifying Concrete Blocks A dust mask is recommended when cutting blocks. While you will also find larger grinders, 4-½ inch and 4-inch ones are perfect for performing most tasks. How to Cut Concrete Blocks with Circular Saw. How to Install Wall Tile Over Textured Paint, Masonry Magazine: Tuckpointing Tool Basics, Asktooltalk.com: Cutting Rough Opening in a Cinder Block Wall, How to Make Cutouts Through a Concrete Wall, How to Install Slate Tile on the Walls for a Wood Stove. Since the asphalt to be cut is more likely than not in place, the steps for cutting follow: Make sure that you angle grinder has a diamond blade on it. Previous Step Next Step. In order to ensure that you correctly use an angle grinder when cutting concrete, it is necessary to take several aspects into account. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. So I need to cut through one pair of cinder blocks, and knock out the other pair. Use a 4 1/2-inch angle grinder equipped with a diamond blade to cut through the mortar via the lines you traced in the mortar as a guide. Remember, you get a much cleaner cut if you don’t push too hard on the angle grinder and just let the tool do the work. Squeeze the trigger inside of the saw’s handguard to start the blade spinning. Pavers, on the other hand, is a construction stone, brick or concrete used to lay asphalt on surfaces,e.g. If cutting a hole in the center of the concrete block, work the angle grinder's blade through the … I have some concrete blocks that are 4 inches by 6 inches. Measure and mark the material to be cut. If you are removing a large area of blocks, such as an area large enough to create a door opening, you may need to add a support lintel above the opening for safety. If you have a thickness larger than 15 cm try to cut the block from both sides and use the sledgehammer to make the block split. While beginners can also buy inexpensive angle grinders, it is best you invest in a reputable product for long-term use. Repeat this process on both sides of the block wall. I checked with a few rental places but it would be expensive to rent a big saw. Squeeze the trigger gently until the blade begins to move. Step 3. These saws can cut through both the mortar and the block itself. Copyright© I need to cut them in half at a 45 degree angle. You may also need to turn the block to cut it on all sides. Put on safety glasses, a dust mask and a pair of heavy work gloves for protection. ... use adequate water, slow tempo, and multiple passes. These blocks are installed in courses or rows, and held together with masonry mortar -- similar to brick. A lot of brick dust will be kicked up, so wear a dust mask, safety glasses and earmuffs. suggestions. These saws work more like grinders than conventional saws, wearing away at the surface of the block. Questions of a Do It Yourself nature should be I would also make a jig to cut the 45s. They work both to cut block before it has been laid and to cut through cinder block walls to create spaces for doors and windows. Once the cut has been made, pull the angle grinder away from the material that was cut and power off the tool. Cut through the concrete block along the score marks with the angle grinder. submitted to our "DoItYourself.com Community Forums". Can I do this with a circular saw and a masonry blade ? 1995-2018 MH Sub I, LLC dba Internet Brands. Check Price. How to grind raised edge of concrete slab? If cutting straight lines completely across the block's face, cut both outside edges before cutting the centre of the line. then use a chisel to score along the pencil line, making sure that the resulting groove is deep enough to hold the blade. Once it’s at full speed, press the saw forward so it cuts through the cinder block. Red Angle Grinder On Table. I only need to make 4 cuts. I'd like to use my variable-speed grinder. 2020-2-26bosch 412 in small angle grinder premium turbo rim grinder cement smoothing bladesbosch 412 in small angle grinder premium turbo rim diamond blade for smooth cut for concrete and masonry materials is rated 30 out of 5 by 2 rated 5 out of 5 by ru If cutting straight lines completely across the block's face, cut both outside edges before cutting the center of the line. With an angle grinder, ... Small 4 1/2" Angle Grinder Cut-off Disks for Brick. problems contact webmaster@doityourself.com. Back the saw out after about 30 seconds to avoid overheating. 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