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What you should know about floor grinders?

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Concrete is a viral flooring material for many reasons. It’s durable, waterproof, and can be customized to fit any design.

Concrete floor grinders are a great way to get rid of the bumps and dips in your concrete where they have been caused by people walking across them over time. 

A grinder will remove the high points from the surface with a rotating drum covered with diamond-embedded teeth. There are many different grinders out there, so it can be difficult to figure out which one is best for you.

Some people think that the cheapest grinder is the best option, but this isn’t always true.

HOW TO GRIND CONCRETE FLOORS?

How do grind concrete floors smoothly like grinding garage floors and get a good result? how do grind different floors like the garage floor, epoxy floor, and concrete floor? How to grind the floor smoothly? How to make the concrete floor grinding and polishing? how to grind high spots of concrete floor?…. It not only requires the good technical skills of the construction workers but also requires knowing the actual floor conditions and some other factors.

  1. professional construction workers;、
  2.  suitable floor machinery;
  3. concrete Hardening agent, concrete repair agent, concrete protective agent, and other floor materials;
  4. good floor craftsmanship;
  5. hardness pen, rebound meter, light meter, and other detection tools to survey the ground to avoid blind construction.

WHICH FLOOR GRINDER AND DIAMONDS SHOULD YOU SELECT?

Choosing the proper floor grinding and polishing machine and diamond tooling is critical for the success of the job, and the following questions should be addressed first:

HOW TO SELECT THE CORRECT DIAMOND CONCRETE GRINDING CUP WHEEL? PICKING THE RIGHT SURFACE AREA

First, you want to make sure you have the right size cup wheel for your project. If you’re grinding concrete, then you might want a bigger wheel than you’d need for a small paint removal job.


Wheels with a smaller surface area tend to be more aggressive. In other words, these wheels leave more scratching behind on the surface you’re grinding.
Bigger wheels with more segments tend to give you the smoothest finish. Make sure you’re clear on your resurfacing plan before you select the size of your concrete grinding wheel.

CATEGORIZING CONCRETE GRINDING WHEELS

There are several main categories of diamond grinding cup wheels out there. One of the first things to look out for is whether your grinding wheel is a ‘double row’ or a ‘single row.’

The term ‘row’ refers to the diamonds placed around the rim of your cup wheel. A single-row grinding wheel works well with most concrete repair projects. Its diamonds are concentrated and give you more control. 

A grinding wheel with two rows of diamonds around the rim has twice the grinding power of the single-row option. It’s perfect for smoothing rough surfaces in a quick fashion.

Another popular form of the wheels is called the ‘turbo row’. The diamonds set around the rim resemble the look of a turbine engine. These wheels are easy to handle and don’t produce as much dust as other options.

If you are looking to work on a surface like marble, you might consider a wheel with a continuous rim. These rims are entirely covered in diamonds. They are known for their power to smooth fine surfaces.

The last category of grinding wheels is a bit of a catch-all. Any cup wheel with a different segment pattern falls into this category. These can work well with unique surfaces on a case-by-case basis.

HOW BIG IS YOUR PROJECT AND HOW MUCH TIME DO YOU HAVE TO COMPLETE IT?

This will determine how much working width is the grinder and vacuum cleaner and how many diamond tools needed.

WET OR DRY GRINDING CONCRETE SMOOTH?

This will sometimes depend on the job and job site. Wet grinding is easier on the equipment, it does not require additional industrial vacuum cleaners, and generates less dust. The grinders always come with a water tank. Dry grinding is less troublesome, as dry grinders are usually equipped with a device for containing the dust, while wet grinding requires manual removal of the mixture of dust and water.

Most operators prefer dry grinding, as it requires less cleanup; however, wet grinding is best for some applications. Just decide according to the actual situation. Remember that dry grinding will always require proper vacuum equipment for dust collecting and removal. Don’t grind with half dry and half wet.

HOW DOES A CONCRETE FLOOR GRINDER WORK?

A floor grinder is basically a powerful rotating disc that can connect to an electric drill.

The machine works by removing the top layer of the concrete or tiled surface with diamond-tipped cutting disks, to expose the substrate beneath.

Concrete grinding creates a very rough surface, and it’s fine if you choose to leave it like this for increased slip resistance. Or, you can follow up with a floor sander machine to make it smooth.

There are many concrete floor grinders on the market, but most are either too powerful or too weak for the average user.

If you choose an industrial grinder that is way too strong, it will take away all the substrate and leave the floor with a thin coat.

Nowadays, there are more and more types of floor grinders on the market, many people do not know how to choose a concrete floor grinder. This guide will show you the traditional classification of concrete grinders and their respective characteristics so that you can make the right choice.

First look at the motor of a concrete floor grinder.

Generally, the power of the motor is 2.2KW ~ 15KW. A high-powered motor is not only easy to start, but also has strong load capacity, fast speed-up, and saves power compared to a low-powered motor with the same load. Moreover, the power of the motor increases and the weight of the machine will increase. The finished ground will be smoother.

However, too high power will damage the motor, which is an overload, and the life of the motor is greatly reduced. The standard power of the motor is generally 80% of the limit power. Irreversible damage to the motor can occur after a certain period of extreme power.
Next, we have to look at the grinding discs of the floor grinder. The floor grinding machine is divided into the integrated machine and the separate machine. The integrated machine, because of its structure, can effectively protect the gears and bearings during the grinding process.

concrete floor grinding machines are also divided into square machines and circular machines.

The grinding disc of the square machine is rotated in the opposite direction, and the smoothness of the ground is higher. The grinding disc of the circular machine is reversed, and the grinding force is stronger. There is also the area of the grinding disc. The area of the grinding disc is directly related to your work area.
Now the development of the flooring industry is becoming more and more prosperous, and the competition between peers is fierce. As a result, the functions of floor grinding machines are more abundant and the types are more.

WHAT IS A CONCRETE FLOOR GRINDER USED FOR?

A concrete floor grinder is an equipment used for grinding purposes. The most common use of the concrete grinder is to provide smoothness on the surface of a concrete slab or any other concrete floor to help provide slip resistance.

This means that users will not find it difficult to walk on the floor in wet conditions. This is very important, especially if your business is a restaurant, as you would want all your employees and customers to have a safe experience.

In addition to this benefit, using equipment such as a concrete grinder can also help prolong the floor’s life.

The edger grinder, which looks like an upright disc, can get rid of bumps around obstacles such as pipes and columns.

The concrete grinder, however, is not only used for commercial purposes. It can also be utilized anywhere, such as in homes and industrial jobs, to grind concrete floor surfaces.

CLASSIFICATION OF CONCRETE FLOOR GRINDER
CLASSIFICATION BY THE NUMBER OF GRINDING HEADS (DISKS)
Single-head (disc) concrete floor grinding machine
Double-head (disc) counter-rotating floor grinder
Three-head (disc) planetary concrete grinder
Four-head (disk) counter-rotating grinder
Four-head (disc) planetary dual-run grinding disc grinder
Six-head (disk) planetary dual-run grinding wheel grinder

CLASSIFICATION BY CONTROL METHOD
Walk-behind floor grinder
Walk-behind semi-automatic (with drive) floor grinding machine
Remote concrete grinding machine
Driving type grinder
Automatic intelligent grinding machine

CLASSIFICATION BY DRIVING POWER
Electric motor drive
Internal combustion engine
Hydraulic motor drive

CLASSIFICATION BY TRANSMISSION METHOD
Belt transmission
Gear transmission
Belt/gear transmission
BRIEFLY, INTRODUCTIONS OF SINGLE-HEAD, DOUBLE-HEAD, THREE-HEAD, AND FOUR-HEAD GRINDERS, SO THAT YOU CAN CHOOSE A CONCRETE GRINDER BETTER.

WHAT IS A SINGLE-HEAD CONCRETE FLOOR GRINDER?
The single-head floor grinder has a power output shaft that drives a single grinding disc. On smaller floor grinders, there is only one grinding disc on the head, usually with a diameter of 250mm-480mm;


FEATURES OF SINGLE-HEAD CONCRETE GRINDER
The single-head floor grinder is suitable for working in a compact space. Because single-head floor grinders are difficult to achieve uniform scratches, they are used for rough grinding and epoxy, glue removal, etc.


WHAT IS A DOUBLE-HEADED COUNTER-ROTATING CONCRETE FLOOR GRINDER?
The double-head reversing concrete grinder has two power output shafts, each of which has one or more grinding discs; and the two power output shafts of the double-head machine rotate in opposite directions, that is, they rotate in opposite directions to balance the torque and make the machine easier to operate. In addition, the grinding width of a double-headed floor grinder is generally in the range of about 550 to 1000 mm.


FEATURES OF DOUBLE-HEADED COUNTER-ROTATING CONCRETE GRINDER
Double-head concrete floor grinders cover twice the working area and finish the same ground in a little faster time than single-head grinders. Although similar to a single-head grinder, it is suitable for preliminary preparation but also has a polishing function.


WHAT IS A THREE-HEADED PLANETARY CONCRETE GRINDER?
The planetary gearbox of the three-head planetary floor grinder has three power output shafts, each of which has a grinding disc so that the planetary gearbox can rotate with the grinding disc mounted on it like a “satellite”. When they are used for surface treatment, both the grinding disc and the planetary gearbox rotate in different directions. The grinding width of the three-planet floor grinder is usually in the range of about 500mm to 1000mm.


FEATURES OF THREE-HEAD PLANETARY FLOOR GRINDER
Planetary grinders are suitable for grinding and polishing because the grinding discs can make overall scratches evenly contacting the ground. Compared with other non-planetary floor grinders, because the weight of the machine is evenly distributed on the three heads, it gives more pressure to the ground, so it is more powerful in grinding efficiency. However, due to the individual torque of the planetary grinder, the workers’ will be more tired than those operating other non-planetary machines.


WHAT IS A FOUR-HEAD REVERSING CONCRETE GRINDER?
The four-head reversing grinder has a total of four PTO shafts, each of which has a grinding disc; and the four PTO shafts of the four-head machine rotate in opposite directions, that is, they rotate in opposite directions to balance torque and make the machine easier operating. The grinding width of a four-head reversing grinder is usually in the range of about 500 mm to 800 mm.


FEATURES OF FOUR-HEAD REVERSING GRINDER
The four-head reversing floor grinder covers twice the working area and completes the same ground faster than the two-head reversing grinder. With rough grinding leveling and polishing functions.


SELECTION CRITERIA
Customers generally consider the price, quality, brand, and other factors when purchasing floor grinding machines, and the basic factor is the machine’s quality. To judge the quality of a floor grinding machine, not only by “work efficiency”, “control ability”, and “reliability“ but also by the construction results of the ground.
The construction result here refers to the flatness, gloss, and clarity of the ground.
Flatness is the main acceptance standard for floor construction and an important indicator of the ground decoration effect. The Gloss Refractive index of ground light is currently one of the industry’s main acceptance standards. Clarity is the presentation of the texture of the ground material. At present, there are corresponding standards in foreign countries.

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