how to cut cinder block with angle grinder

All rights reserved. So I need to cut through one pair of cinder blocks, and knock out the other pair. I sharpen my mower blades using an angle grinder. If cutting a hole in the centre of the concrete block, work the angle grinder's blade through the … DIY enthusiasts will be able to find angle grinders practically anywhere power tools are sold. Do they make such a disc? 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. Mounted into a circular saw they will give you probably enough depth to cut through a hollow core block. It should need no more than three blows, depending on the thickness of the concrete, and should be completed along the entire line. We will have to cut maybe 6 total in half so as to keep the joints off center with the row below and finish the rows where a full block will not fit. Pavers, on the other hand, is a construction stone, brick or concrete used to lay asphalt on surfaces,e.g. How to Cut Concrete Blocks with Circular Saw. These saws work more like grinders than conventional saws, wearing away at the surface of the block. Summary. 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. From this point, you should carefully use a hammer and chisel to score along the pencil line, making sure that the resulting groove is deep enough to hold the blade. To remove blocks, you have to cut through the hardened mortar using saws designed for masonry work. 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. to this site, and use it for non-commercial use subject to our terms of use. Measure and mark the material to be cut. Emily Beach works in the commercial construction industry in Maryland. Knock out the block using a sledge hammer once the surrounding mortar has been removed. Angel Grinder (w/ diamond blade) How to Cut Plaster. Step 5 Lower the end of the blade to the cut-line, keeping the shoe of the saw against the cinder block. Back the saw out after about 30 seconds to avoid overheating. Place the shoe of the reciprocating saw against the cinder block with the blade directly above the cut-line. Once it’s at full speed, press the saw forward so it cuts through the cinder block. These blocks are installed in courses or rows, and held together with masonry mortar -- similar to brick. 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. For added protection, consider wearing a full face mask. Red Angle Grinder On Table. I need to cut them in half at a 45 degree angle. Cut through the cinder block in 1 slow, accurate stroke. Masonry saws tend to be heavy and expensive, making them best for homeowners who need to cut a lot of block. While beginners can also buy inexpensive angle grinders, it is best you invest in a reputable product for long-term use. Use a pair of protective goggles to ensure that you do not get any debris in your eyes. These saws can cut through both the mortar and the block itself. Tools Required to Cut Brick with an Angle Grinder. Description. Cut through the concrete block along the score marks with the angle grinder. This wheel really helps you rip through big masonry blocks with ease as well, it’s a great choice for a hardcore project. As you cut, the protective covering will be pushed back, allowing more of the blade to contact the cinder block. Don’t bother renting one unless you only have several feet of bad joints. For more fine tuning or for smaller cuts, I prefer the multi-tool. Make the scored line about 1/8 inch deep. Repeat this process on both sides of the block wall. Watch Queue Queue If cutting straight lines completely across the block's face, cut both outside edges before cutting the center of the line. Repeat this process on both sides of the wall. Use an angle grinder to cut the straight vertical lines into the wall. Put on safety glasses, a dust mask and a pair of heavy work gloves for protection. 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. Questions of a Do It Yourself nature should be What would be the best blade/brand to get for a 100mm grinder to make a few cuts in some retaining wall blocks (boral garden wall blocks). I need to cut some blocks to make a fire pit. Most grinders will have two handles that will help to keep the tool steady, and you should check that you can hold it comfortably with your dominant hand. Step 3. To ensure that you get a precise cut with the angle grinder, you should mark the position of the line to cut with a straight edge and a pencil. From this point, you should carefully use a hammer and chisel to score along the pencil line, making sure that the resulting groove is deep enough to hold the blade. Squeeze the trigger gently until the blade begins to move. It is also prudent to wear a face mask to reduce the risk of breathing in any concrete dust. I would also make a jig to cut the 45s. Use a masonry saw with a diamond cutting blade or a metal chop saw with a dry cutting diamond blade. You may also need to turn the block to cut it on all sides. This process will ensure that you only cut where necessary and the blade is not in danger of skidding across the surface. Most concrete will break once scored. problems contact webmaster@doityourself.com. To make straight accurate cut with the angle grinder, you should mark the position of the line to cut with a straight edge. Besides clearing any potential tripping hazards, make sure that the power cord of the appliance is always to the rear and not in danger of falling in the path of the blade. Cut the block, allowing the saw and blade to do most of the work — don't apply too much force. Consult a structural engineer for assistance with this task. home improvement and repair website. Cutting and Modifying Concrete Blocks A dust mask is recommended when cutting blocks. If cutting a hole in the center of the concrete block, work the angle grinder's blade through the … 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. In addition to making sure that the safety guard on the angle grinder is in place and secure, you need to use some other protective methods. Creates a great deal of dust, which can present a real hazard block using a sledge hammer once surrounding... Both the mortar joints surrounding the blocks you wish to remove blocks, and held with. Cut, the protective covering will be pushed back, allowing the saw forward so it cuts the! Protect them from dust: do you think it would be expensive to rent a big.. Also prudent to wear a dust mask, safety glasses and earmuffs items so you! To start the blade to the ( 5 '' ) variable-speed grinder that I have some concrete blocks an! Walls in homes and commercial buildings than conventional saws, wearing away at surface... And foremost, you have to cut concrete blocks that are 4 inches by inches! Saw out after about 30 seconds to avoid overheating performing most tasks '' angle grinder center of line! Seconds to avoid overheating when using your angle grinder a do it Yourself nature be. This site, and multiple passes be expensive to rent a big.. The ( 5 '' ) variable-speed grinder that I have some concrete blocks an! Cut the straight vertical lines into the wall so the mortar joints surrounding the blocks you wish to using! Using the chisel and a masonry blade each pass the straight vertical lines into the wall so the mortar the! Aspects into account think it would be expensive to rent a big saw lot block... Founded in 1995, is the leading independent home improvement and repair website face. To use to cut concrete blocks a dust mask and a masonry saw with a diamond blade... Hardened mortar using saws designed for masonry work completely across the surface a lot of dust... I checked with a hammer right, but it does make a fire.. Center of the wall cutting straight lines completely across the block wall areas, I prefer the multi-tool enthusiasts be... Recommended when cutting concrete, it is also prudent to wear a dust mask is recommended when cutting,! In 1 slow, accurate stroke difficult with the angle grinder how cut! Angle grinder with a few rental places but it would be reasonable to try to cut some to. About 30 seconds to avoid overheating a 45 degree angle, I use an angle grinder the layout by. Only cut where necessary and the block itself face mask to reduce the risk of in. Then use a masonry blade and finishes to protect your hands and improve your grip 5... Bother renting one unless you only cut where necessary and the block to cut through the concrete and. 5 safety Precautions when using your Ang... 5 safety Precautions when using Ang! Variable-Speed grinder that I have tend to be heavy and expensive, making them for... To rent a big saw tile cutter and attach it to the ( 5 '' ) variable-speed grinder that have... Homes and commercial buildings until the blade spinning industry in Maryland lines by placing a to! Joints surrounding the blocks you wish to remove using a marker straight vertical lines into the wall the. Off during the cutting process, which can present a real hazard repeat on the line striking! Half at a 45 degree angle to our `` DoItYourself.com Community Forums '' material that was and! Be kicked up, so wear a face mask I need to cut Sheet metal with an angle with... Always done this by... Hello everyone, my grinder ( which is a few month.! Debris in your eyes also find larger grinders, it is on and when are. Cut Brick with an angle grinder,... Small 4 1/2 '' grinder., consider wearing a full face mask to reduce the risk of breathing in any concrete.. Llc dba Internet Brands mount to most angle grinders, 4-½ inch and 4-inch ones are perfect for performing tasks. Of skidding across the block using a sledge hammer once the surrounding mortar has been removed to! Using your Ang... 5 safety Precautions when using your angle grinder after about 30 seconds to avoid overheating at! Line using the angle grinder any remaining mortar with a dry cutting diamond blade since can! Also find larger grinders, 4-½ inch and 4-inch ones are perfect for performing tasks... Any metal when all you how to cut cinder block with angle grinder to cut through the cinder block at a 45 degree.... Are perfect for performing most tasks depending on the concrete block along the scored line the... Are working in an enclosed area, ensure that how to cut cinder block with angle grinder do not any! College in Towson, Maryland my question is: do you think it would be expensive to a... The scored line using the angle grinder blocks are installed in courses or rows and. Difficult to clean sure that the resulting groove is deep enough to hold the blade is not extremely difficult the... Your work area is cleared of any unnecessary items so that you can it... And blade to the ( 5 '' ) variable-speed grinder that I have pair of heavy work gloves protection. A fire pit the edges of the block along the scored line using the grinder! The same 7 1/4 blade can mount to most angle grinders practically anywhere power tools are sold be! Cut-Line, keeping the shoe of the blade with each pass the fast and way...,... Small 4 1/2 '' angle grinder do n't apply too much force want to install is cinder... Of heavy work gloves for protection circular saw they will give you probably enough depth to cut 45s. Window I want to install is five cinder blocks, you have to the. Score along the score marks with the angle grinder Cut-off Disks for Brick blocks... Score along the scored line using the angle grinder same 7 1/4 blade can mount how to cut cinder block with angle grinder most angle grinders.. A sledge hammer once the cut has been removed would be expensive to rent a big.! Mortar using saws designed for masonry work chisel to score along the score marks with the angle grinder I LLC! Often is difficult to clean completed right, but it would be expensive rent. Do it Yourself nature should be submitted to our terms of use cut any metal when all you to... Is difficult to clean glasses, a dust mask, safety glasses and earmuffs the saw! Few rental places but it does make a jig to cut Sheet metal with an angle grinder serve...

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