Floor grinder or Surface Grinders 
Petrol
FLOOR GRINDING VIDEO note: basic idea of how floor grinding works we do not have the machines demonstrated in the video but rather the machine in the picture.
FLOOR GRINDING INSTRUCTIONS
Using a Concrete Floor Grinder Safely and Properly
A concrete floor grinder uses discs that rotate horizontally to clean, smooth out or level a concrete floor.
It’s what you want to use if your job calls for removing 1-2mm of surface concrete.
On the continuum of products used on concrete, there are blasters, scalers, scabblers, planers and floor grinders.
Floor grinders are used to do the fine work – similar to using fine sandpaper on wood or painted surfaces. You get the smoothest surface on concrete by using a grinder rather than other tools.
Concrete floor grinders are used to get rid of trowel marks, remove coatings or graffiti, smooth over rough spots, or add texture to a too-slippery surface.
They come with a rubber guard that keeps the dust generated from grinding under control.
There are different types of discs and different configurations, such as two discs in a counter rotating configuration.
The motors in concrete grinders are usually in the 2 to 15 hp range.
Most concrete floor grinders are petrol powered.
For so-called wet grinding jobs, grinders sometimes come equipped with water tanks. Some are equipped with diamond reinforced discs for very efficient grinding. There are edge grinders that get up into corners and next to walls and there are floor grinders with attachable pads to use on more delicate stonework or brick.
Unless your business is concrete floor grinding, you’re probably better off renting a grinder rather than buying one.
In residential applications, concrete floor grinders are often used to create a rustic texture on concrete or stone.
They may have a width of anywhere from six inches to 24 inches and weigh up to 300 lbs. (136 kg).
They may cost as much as $5,000 USD, so it is easy to see why most people rent these rather than buying them.
Learning to use a floor grinder is not that difficult and it is a skill that can help you easily update the appearance of your home or driveway.
If you only have a small area to cover, you can use a handheld model that will give you more control in tight spaces.
Once you get a little practice using a floor grinder, you will be able to get good results on floors, countertops, patios or wherever else you may want to alter a concrete surface.
Please do not operate a concrete floor grinder without your work gloves, ear protection and safety glasses.
Recommendations when hiring.
- Make sure you know where power switches are and if your grinder is for use on wet concrete or dry concrete. Some grinders can do either.
- Before starting the grinder, press the handle down enough to release the pressure from the grinding surface while leaving the disc on the slab surface. The reason for doing this is to help the motor reach its operating speed more safely.
- Concrete floor grinders have two wheel settings: one is meant for transport and the other is meant for grinding. Make sure the wheels are in the rear position meant for grinding before you start.
- Turn the switch on the starter to “Start.”
- After the motor reaches its operational speed, gently set the grinder onto the slab and start grinding. Continue the process by moving the grinder in a side to side fashion to eliminate swirl marks.
- If your grinder is suitable for wet grinding, and you want to try this method, you should lightly dampen the floor with a fine spray. This will help control dust. Don’t use excess water, because you’ll just have to mop it all up when you’re done. Use the same side to side motion for wet grinding.
- When you’re done, you need to clean up the grinder before putting it away or returning it.
- First, unplug the grinder.
- Next, use a hammer to knock off hardened bits of debris stuck to it. Use concrete dissolvers if a hammer doesn’t do the job. Rinse the machine before putting it away or returning it.
- Using a concrete floor grinder isn’t exactly difficult, but it does take a little practice to gain proper control of it so you can do the job most efficiently. This probably won’t take you long to get a feel for.
- It cannot be overemphasized, however, that you need to wear the proper safety equipment when using a floor grinder.Application: To remove paint or thin layers of adhesive on concrete floors or slight imperfections to a finished floor.
- NOT to be used to try and lower an existing floor level by more than 4mm.
- To avoid engine flooding always close petrol tap when switching engine off.
- Check oil every 2 hours.
- Rinse machine thoroughly with water directly after use.
- Machine uses LRP (RED) PETROL.
- Before starting the grinder, press the handle down enough to release the pressure from the grinding surface while leaving the disc on the slab surface.
- The reason for doing this is to help the motor reach its operating speed more safely.
- Concrete floor grinders have two wheel settings: one is meant for transport and the other is meant for grinding.
- Make sure the wheels are in the rear position meant for grinding before you start.
- After the motor reaches its operational speed, gently set the grinder onto the slab and start grinding.
- Continue the process by moving the grinder in a side to side fashion to eliminate swirl marks.
- If your job is suitable for wet grinding, and you want to try this method, you should lightly dampen the floor with a fine spray. This will help control dust.
- Don’t use excess water, because you’ll just have to mop it all up when you’re done.
- Use the same side to side motion for wet grinding.
- Using a concrete floor grinder isn’t exactly difficult, but it does take a little practice to gain proper control of it so you can do the job most efficiently.
- This probably won’t take you long to get a feel for.