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The Official Publication
of the Mason Contractors
Association of America
New Masonry Saws and Cutting Machines
Cutting-edge technology and better designs are changing the landscape for saws.
Smart engines eliminate costly repairs
“If a hardscaper is using temporary labor, and there’s a lot of gas on the jobsite – gas and oil mixtures, regular gas, diesel – you don’t have to worry about the wrong gas being used,” says Mike Ward, Husqvarna product manager for power cutters.
A sensor detects if the engine has the correct oil, based on the dye concentrate in the two-cycle oil and gas mixture, Ward says. If the wrong oil or no oil is used, the engine won’t run above an idle.
“The biggest problem that we run into with high-speed saws is when the saws don’t run on the gas and oil mix. It’s a very expensive repair. The cylinders are ruined,” says Andy Lundberg, product manager for tile and masonry for Husqvarna. “You can’t, no matter how hard you try, ruin these [K750] saws. They have to have oil to run.”
Ward says Husqvarna also launched an electric power cutter that’s capable of wet cutting. The K3000 Electric has GFCI (ground-fault circuit interrupter) protection built into the machine for safety and convenience.
“You can cut wet, which gives you dust suppression, so you can cut indoors,” Ward says. Strategically placed nozzles shoot water onto the blade, which gives the blade the correct amount of water needed for cutting. “You have less slurry to clean up at the end of the day.”
Increased cutting capacity for large pavers
“The thing we started to notice from the user side is that in the paver market, we’re seeing larger pavers,” Delahaut says, noting that masonry contractors were having trouble cutting the pavers on traditional saws. “Our saw is designed for cutting larger pavers, brick, and other popular masonry materials.”
The saw cuts a length of up to 28 inches and can cut masonry materials either wet or dry, he says. A nine-horsepower Honda gas engine powers the saw, although a two-horsepower Baldor electric motor is also available.
“The engine has a lot of power for the customer to cut pavers,” Delahaut says.
Design changes allowed MK Diamond to produce the saw less expensively than other masonry saws, he says. The cutting head is stationary, which eliminates the need for the user to pull down the blade to the material. Repeatedly pulling down the blade can cause carpal tunnel, in some cases.
“One thing we heard from users is they were tired of pulling the head down,” Delahaut says. “This has a fixed head, so you push the material with both hands, which makes it much safer.”
New engine technology improves performance
With the X2 system, masonry contractors don’t have to worry about cleaning the filter everyday, Hanks points out.
“The filters on these units shouldn’t be cleaned at all but replaced when the operator notices a loss in power,” he says. “The filter can go up to a year before being replaced, depending on hours and type of use. Because of the abrasive nature of concrete dust, cleaning the filters can actually damage the units by allowing this abrasive dust into the cylinder.”
Matching the saw speed to the material
“While the operator is using the saw, he can change the speed to match the hardness of the material,” Delahaut says.
The saw’s ergonomically designed handle reduces operator fatigue, a heavy-duty conveyor cart supports heavy weight, and an open back allows cuts up to 20-inches long, Delahaut says. “We did a lot of work to develop the saw and make it safer for the operator.”
Containing dust while dry cutting
The JackVac1000 has an integrated saw stand, a dust collection hood, and connects to 14-inch masonry saws, Guth says. The unit, available in gas or electric, has been redesigned over the last year.
“It’s about half the size and weight,” he says. “It’s much more portable.”
The JackVac 2000 attaches to 20-inch masonry saws. Guth says his systems let masonry workers dry cut materials with minimal exposure to silica dust.
“[Masonry contractors] realize silica dust is a liability. There are legal ramifications down the road from breathing the dust,” he says. “The real problem is if the contractors want to dry cut, then they need dust collection.”
High-end, lighter weight grinders
“We redesigned the motor to make it more efficient, not so much to get more power, but to make the tool weigh less and still get the same power,” says Ryan Anderson, product manager for angle grinders.
“We separated the handle from the tool, as much as possible ,” Anderson says. “We’ve made it a more efficient tool. You can use it for longer periods if time without so much fatigue.”
One of the grinders, model 1994-6, offers a handle that rotates 90 degrees in either direction for better control, Anderson says. “This makes it comfortable to use when making awkward cuts.”
|Last Updated on Friday, 03 April 2009 17:20|