A concrete cutting saw is a power-tool that is used for cutting bricks,concrete, tile, masonry, asphalt and other solid material or elements. It may be small or a big hand held cut-off saw, a big walk behind saw, and it can be powered by pneumatic or hydraulic pressure, electric motors or gasoline. The blades that are used in these saws are diamond saw blades. Abrasive cut off wheels may also be used on cut off saws to cut steel and stone. The friction that is generated whilst cutting hard-materials for example concrete requires the blades to be cooled off so as to reduce dust and prolong their life.
Types of concrete cutting saws
Wall saw-This type of saws cut wall (concrete) by operating on a track that is attached temporarily.The concrete saw may operate on electricity, hydraulic or air power so it is adaptable to any work site.It has a diamond encrusted blade that operates on a rotating spindle along the cutting saw’s wall track. The.The blade-size ranges from 18-72 inches and has a capacity of cutting a wall to a depth of 33-inches.When cutting a window or door in a wall, the wall-saw blades can also cut the concrete wall at an angle of 90 degree or the blade can be put to make a beveled edge.
Instead of making a one deep cut with the wall saw, some shallow, progressively deeper-passes cut through the wall without putting unnecessary force or strain on the cutting saw.Using this type of cutting saw allows you to make precision cuts, which reduces the amount of patch-work needed.
Core drill saw-For some wall cuts, several circular incisions works well than a straight cut hence the best concrete wall cutting machine you can choose is the drill saw. The core-drill saw has bits that are attached. The bit can vary in size from 0.5-inch to 60-inches. Barrel extensions enable the core-drill to cut the wall to any depth.
The cutting strength that bore through a concrete-wall is provided by the diamonds that are welded on the saw bit.The worker can remove parts of a wall by lining holes in a pattern or line.The saw can also give access for plumbing, HVAC, and electrical lines through thick concrete-walls.
Wire saw-When the concrete wall is too thick....(for a core-drill saw or a wall-saw), the concrete saw of choice happens to be a wire-saw.This tool uses a multi strand loop of encrusted wires with bits that are made of diamond to cut through the walls.Since the wire loop can be adjusted, the wire-saw can be able to cut any thickness...(of a concrete-wall). The saw can be adjusted to work in enclosed spaces where different type of saws can not fit. The wire saw pulleys that run a wire saw run from a hydraulic-power source.
Before using a concrete saw, it is imperative for you to read and understand the operation manual so as to avoid injuries. The user should inspect the machine to confirm if its in good condition and then perform some cleaning work.
Next, the machine user should check and inspect the diamond saw-blade. Here’s the checklist:
Gullets-inspect the steel core for cracks. Cracks indicate fatigue failure and continuous sawing may lead to a catastrophic failure.
Drive pin hole-the pin hole should not be distorted.
Edge of the steel core-inspect the edge of the diameter for discoloration, blue oxidation is an indication of overheating that is caused by insufficient-cooling.
Arbor hole-Its essential that the arbor hole’s diameter matches the saw blade, and that its free from any distortion.Collars (correct blade flanges) should be used.The interior face of the flanges should be clean & free of any debris.
Directional arrow-Inspect to ensure the saw blade is properly oriented. Refer to the directional arrow on the saw blade and then place it in such a way that the direction of its rotation `down-cuts’ with the turn(of the shaft).
Directional segment or rim-inspect to make sure that there are no dings,cracks or missing parts of the diamond rim or segments.Don’t use a blade that has a missing portion or segment of the rim.
Specifications and features-Make sure that the blade’ specifications and features correctly match the sawing-operation.
Finally, Maximal RPM- this is the maximum recommended operating speed for the selected blade.Exceeding the maximal speed is dangerous, and can damage the blade and lead to poor performance.