Concrete Grinder-AP

EXPANDER 850: Remote controlled grinding and polishing machine for medium-big sized surfaces available into two versions of 20 and 25 HP.
Main features: With the included remote control it is possible to control all the working functions such as: • Speed and directions of the machine. • Speed of the planetary. • Planetary turning directions. • Control of grinding head pressure. • Drift control. • Emergency safety stop.
Other features: • Working width 850 mm with 3 large size 240 mm tools. • Speed of tools ranging from 300 to 1300 rpm. • Automatic adjustment of the working pressure. • Strong gear box with thermo-hardened steel gears for a longer life. • Adjustable inclination of the Planetary to allow a bigger frontal cutting. • No noise during the work. • Third insertable front wheel for easy transport and to load into the van. • Battery powered for independent tractions when unplugged. • Auto levelling Planetary System. Additional features: • To prevent working emergencies the machine is engineered to be driven manually using the included handle and unlocking traction wheels.

Product Description

A concrete grinder can come in many configurations, the most common being a hand-held Angle grinder, but it may be a specialized tool for countertops or worktops. There are also purpose-built floor grinders that are used for grinding and polishing marble, granite and concrete. Machines that grind concrete floors are usually made to handle much more stress and will have more power to drive the unit as concrete has much higher sliding friction than marble or granite which is also worked wet, therefore with less friction. In fact, some types of marble will spark when it is ground dry, causing deep damage to the marble surface.

All concrete grinders use diamond segment pads or diamond resin pads to grind or polish. The diamond tools used for grinding most commonly are diamond grinding cup wheels, and for polishing are usually diamond polishing pads. The use of diamond tooling is the most common type of abrasive used under concrete grinders and come in many grits that range from 6 grit to the high thousands, although 1800 grit is considered by the insurance industry as the highest shine to apply to a floor surface.