The concrete grinding discs are quite crucial to a mason or a handyman who cuts or grinds concrete materials often. If this happens to be your profession, then a grinding disc is one tool you might not be able to do without. NCCuttingtools is a professional manufacturer with many years of experience in the cutting tools industry. It's a better choice if you have any requirements.
Corediam contains other products and information you need, so please check it out.
Firstly, Grinding discs are abrasive grinding/cutting tools as you will find bits of abrasive grains on the surface of grinding discs. They constitute a large part of the grinding disc. Without these grits, you may as well not have a grinding disc. We&#;ll explore tips to consider when selecting the right concrete grinding disc for angle grinders.
What are the tips to consider when selecting concrete grinding discs?
So, grinding discs come with expiry dates? Yes, they do. Don&#;t feel left out; a handful of people don&#;t know this. Expiry dates appear in month and year format on grinding discs. Manufacturers imprint these expiry dates on grinding discs as they should comply with the manufacturing regulation. You are likely to find this date on the centre ring of this disc. Plus, the expiry date is usually three years from the manufacture date. On smaller discs, you might find the expiry date on the label or probably the disc itself. Why do concrete grinding discs come with expiry dates?
Well, if you wish to find out, read on. The reason these discs come with expiry dates is due to the resin the manufacturer makes use of in the manufacturing process. The resin plays a vital role in the grinding disc as it helps to bond the abrasive. Over time, the wax starts to absorb moisture, which leads to the deterioration in the grinding disc. Using a grinding disc after its expiry date can pose a severe risk to the mason or handyman, or even anyone nearby.
Why you may be thinking of your budget, it&#;s imperative to know that cheaper grinding discs aren&#;t of high standards. Most of the time, this is often due to the contexture of the substandard nature of the abrasive. Cheap purchases might take you back to the market again, searching for another concrete grinding disc. Plus, buying cheap discs can affect your production process negatively. In this regard, we advise masons or handymen to look out for diamond grinding discs for concrete as diamond tools have proven to be very efficient. Plus, they are quite durable and wear evenly.
Discs tend to differ based on the strength of the bond that holds the abrasive and the grain spacing. The grade or strength of the bonding material ranges from AH (soft), I &#; P (moderately hard), Q &#; Z (hard). You should take note of this when purchasing a concrete grinding disc. The wheel grade also goes a long way to determine the wheel speed, coolant flow, grinding depth, maximum and minimum feed rates, and the likes.
Soft-bonded discs release the grains too quickly, which makes the wheel wear out fast. With hard-bonded discs, dull grains tend to cause glazing, which invariably makes the grains to wear out soon. Regarding grain spacing, it usually spans from 1(the densest) to 17 (the least dense). Discs that come with less grain density are open-structure discs. Open-structure discs cut more freely and play a vital role in the finish. Plus, they cut broader and deeper with less coolant.
The diameter of a grinding disc can span from 1&#; &#; 20&#;. It can also range from 0.035&#; to as far as ½&#; as regards thickness. You can use the smallest discs for minor projects such as auto body works and the likes. The largest ones can through thick metal and concrete constructions like railway tracks. Grinding discs also come in different types &#;
These discs are best for horizontal or vertical spindle grinders. They have no mounting support. Masons use them to create flat surfaces.
These discs are quite common in most workshops. Handymen use them for centerless, cylindrical and surface grinding operations. Plus, you will find them mostly on the bench on pedestal grinders. Masons use them to create slightly concave surfaces.
You can use tapered discs for grinding threads and gear teeth. Primarily, it is a straight disc that tapers towards the centre of the disc. However, sharp discs can accept higher lateral loads.
You can use this disc to provide an additional radial grinding surface.
These discs do well in jig grinding and cutter grinding.
You can use these discs to grind milling cutters and twist drills.
Diamond discs are the best when it comes to grinding sturdy materials like precious stones, carbide cutting tips, concrete. For concrete, diamond discs are your best bet as they tend to last longer.
The grit refers to the individual size of each grain in the concrete grinding disc. The grit size corresponds to the number of openings per linear inch in the final screen. Invariably, the higher number of grains translates to smaller openings in the screen the grain pass through. Lower numbers such as 9, 15, or 23 depict a disc with coarse grain. Coarser grains go with larger materials. You can also use coarse grains for rapid removal, where the finish is irrelevant. High numbers such as 75, 150, or 180 depict fine grit discs. This grit type imparts fine finishes.
Abrasives come in varieties, and as such, they should also be an essential factor when you&#;re looking to select a concrete grinding disc. Abrasives have different properties when it comes to strength, hardness, impact resistance, and fracture toughness. There are two types of abrasives manufacturers use to produce grinding discs. These abrasives comprise several mineral and chemical ingredients.
Also, the formula tends to vary depending on the sturdiness of the material the disc intends to polish, cut, or grind. There are two known types of abrasive grains &#;
These abrasives come in aluminum oxide, silicon carbide, ceramic forms.
These abrasives come in diamond and cubic boron nitride forms.
Well, as a mason that works on concrete most of the time, we advise that you go for grinding discs with super abrasives due to their diamond properties. Concrete is a hard material and, as such, would need a diamond grinding disc. On the plus side, you can use diamond grinding discs for concrete on other materials such as granite, cemented carbides, stones, and marbles.
We will be providing answers to some common questions handymen or masons tend to ask when they want to purchase a concrete grinding disc. These answers should put some things in perspective as regards any future decision you want to make.
There are numerous grinding discs on the market. These grinding discs tend to vary regarding their functions and the hardness of the disc&#;s material. There are grinding discs for woods, metals, diamonds, stones, concrete, and the likes. You just have to select grinding discs as regards the materials you&#;re looking to cut or grind.
Concrete grinding discs are sturdy cutters, and as such, you can also use your concrete grinding discs for materials like marbles, gemstones, carbide, and the likes.
If you&#;re looking to purchase the best concrete grinding disc, then NC Cutting Tools is your best bet in this regard. They are prominent manufacturers of diamond grinding discs for concrete, as well as other diamond tools as well. Most reputable workshops rely on NC Cutting Tools for their quality tools as they have a track record of manufacturing topnotch diamond cutting tools.
If you&#;re looking to embark on a concrete project, then we advise that you purchase your tools from NC Cutting Tools.
With the tips, we discussed above, selecting a concrete grinding disc should be much of a hassle as you know what to look out for. However, a whole lot depends on whom you&#;re buying from. In this regard, we recommend NC Cutting Tools as the No.1 manufacturer for quality tools. Don&#;t forget to wear your safety gear during any cutting/grinding operation. Stay safe!
If you wish to know how a concrete grinding disc works, click here.
I carry a range a small range of basic diamond grinding shoes to suit cub grinders in Bibra Lake .
My high quality metal Redilock shoes are compatible with other grinding machines from different manufacturers.
Suitable for wet and dry grinding.
It is impossible to make a recommendation on YOUR grinding job. Every job is different.
For tips on grinding, see information at the bottom of this page.
Redi Lock Single Segments &#; ideal for general grinding with lighter, single phase machines.
#25 grit is ideal for first pass, then #80 for second pass.
Tyrolit H2 Gold #25 single segment - W shaped. Soft/medium bond for hard concrete
Tyrolit Redilock H4 Brown #80 single segment - W shaped. Soft/medium bond for hard concrete
Tyrolit Redilock X2 Gold #25 single segment - W/M shaped. Special soft bond for extremely hard concrete
Tyrolit Redilock X4 Brown #80 single segment - W/M shaped. Special soft bond for extremely hard concrete
All $33 each incl GST
Redi Lock Double Segments &#; ideal for general grinding with heavier, often three phase machines.
Tyrolit H2 Gold #25 double segment - W shaped. Soft/medium bond for hard concrete
Tyrolit Redilock H4 Brown #80 double segment - W shaped. Soft/medium bond for hard concrete
Tyrolit Redilock X2 Gold #25 double segment - W/M shaped. Special soft bond for extremely hard concrete
Tyrolit Redilock X42 Brown #80 double segment - W/M shaped. Special soft bond for extremely hard concrete
All $45 each incl GST
Tyrolit Redilock S3 DS Rectangle Red #40.
Two segments.
Very hard bond for soft/green concrete.
Ideal for grinding green concrete with 250mm machine.
(Try 3 shoes initially. If they wear too fast, try 6 shoes.)
$55 each incl GST
Coffin shaped for general grinding.
Two segments.
Squarer segments have a long leading edge, so are ideal on uneven concrete.
For hard to medium concrete
Premium quality (all Korean)
Rediloc Shoes #25 /30 grit
Rediloc Shoes #50 /60 grit
Rediloc Shoes #100 grit
Want more information on Diamond Grinding Shoes Wholesale? Feel free to contact us.
All $55 each incl GST each
(or $450 incl GST per box of 9 shoes)
Arrow shoes are for glue removal and quick removal of thick layers of epoxy and paint.
Used for general grinding as well.
12mm height, #25 grit, two segments, medium bond.
All $50 each incl GST each
(or $405 incl GST per box of 9 shoes)
PCD Shoe: 2 x PCD per segment, for very aggressive removal of glue, epoxy etc
$100 each incl GST
Available in clockwise and anti clock wise station (check which you need).
(Poly Crystalline Diamond feature chunky diamond particles for fast removal of thick and sticky compounds like paint, epoxy, mastic, adhesives, urethane and residues. They are commonly used when conventional diamond shoes will not grind the material quick enough or they tend to get clogged up. This is ideal if you are applying another compound.
But if you want a smoother surface, they will be too rough.
Plate:
250mm Cub grinder plate with nine Redilock shoe slots.
$250 each incl GST
This is my complete range. If you need something else, I suggest you try:
- Concrete Hire (Works Plus dealer) in Canning Vale, here
- Taman Tools in Carlisle, here
Masterfinish G1-A Grinder consumables
Wedge - abrasive segment
Less expensive option to grinding concrete than diamond shoes
Available #16 grit, #24 grit or #36 grit
96mm length, 75mm at widest, 58mm at narrowest, 50mm thick
3 stones per grinder
Part no 29, 29-24 or 29-36
$40 ea
Wedge diamond block - medium grit
Medium hard bond, #35/40 grit, red
4 segments (40 x 10 x 10mm) on each shoe
Shoe - 90mm length, 80mm at widest, 58mm at narrowest
3 shoes per grinder
Part no WBGP
$150 each
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Cub Grinder Plate:
250mm Cub grinder plate with six Lavina quick change shoe slots
$195 each incl GST
Quick Change Shoes:
One segment $25 each incl GST
Two segments $35 each incl GST (available medium and hard, #25/30, #50 and #140)
Super hard bond is for very soft concrete. Maybe it's due to the sand type in the Perth region but whatever it is, I find this bond works well and lasts decently. My normal hard bond for some reason tends to wear a bit too fast on soft and relatively green concrete in Perth, despite the general rule that Perth concrete is harder than that of the east coast.
Two segments $45 each incl GST
Epoxy/glue etc removal:
Arrow Shoe:
Arrow shoes are used for general grinding as well as adhesive, epoxy and paint removal.
2 x arrows per segment, #16 soft bond for very hard concrete, for removal of glue, epoxy etc
$40 each incl GST
PCD Shoe:
Poly Crystalline Diamond feature chunky diamond particles for fast removal of thick and sticky compounds like paint, epoxy, mastic, adhesives, urethane and residues.
2 x PCD per segment, for very aggressive removal of glue, epoxy etc
$65 each incl GST
Available in clockwise and anti clock wise station (check which you need).
Note - When workers cut, crush, saw, drill, polish or grind products that contain silica, particles are created, which are one-hundredth of the size of a grain of sand. These can get stuck deep in the lungs. Ensure precautions to limit exposure to dust are in place.
Use a half face respirator or a PAPR (Powered air purifying respirator).
See the WA government's info on silica dust here.
Prices correct as of 1/11/24 but subject to change.
Please see our "Contact Us" page (here) for Australia wide delivery information.
Grinding with Cub Grinder:
See tips at the bottom of this page
A Guide to Concrete Grinding:
While this introduction is basic only, it does give you a few ideas and considerations when grinding concrete.
It is hard to guess the hardness of concrete. I suggest you start with a hard bond (for soft concrete). If it is not cutting, or is very slow, try a softer bond.
Concrete grinding is the process of removing high points, contaminants, and loose material from a concrete surface using a grinding machine. When grinding concrete, the bond of the diamond shoes should normally be the opposite of the concrete, ie use a soft bond on hard concrete, and a hard bond on soft concrete. Use a larger diamond grit (lower number) for faster removal of concrete and for harder concrete.
If you mis-match, the results will be poor. A hard bond with hard concrete will not grind, whereas a soft bond on soft concrete will wear out the shoes very fast.
Grinding hard concrete does not produce much dust, and it is usually soft and non abrasive. The diamonds cut, blunt and break as normal, but the metal bond surrounding them is not worn away easily without the dust, so the diamonds are not exposed as much as with soft concrete. The diamond segment glazes over and stops working and rubs on the floor instead of cutting it. You can use larger diamonds (around 25 grit) to increase dust production. Also, reduce the surface area with fewer segments to increase the weight per square centimetre.
Grinding soft concrete usually produces sufficient gritty, abrasive dust that will wear away the bond and expose the diamonds adequately. In fact, too much dust can cause the grinding wheel to wear too fast, so vacuum up excess dust. Reduce the weight on the wheel or increase the surface area with more segments to reduce the weight per square centimetre.
Inspect your grinding shoes regularly to make sure diamonds are exposed adequately and that they are not overheating . Even the best shoes will perform badly if used in the wrong application.
Grinding Exposed aggregate with Cub Grinder:
Some operators use half hard bond and half soft bond, to cope with the two different hardnesses in the floor (for the aggregate and the concrete).
Others use a hard bond with water. Try lots of segments, or double segments, to reduce bouncing.
4 steps to grinding a concrete floor
More shoes means more segments, which is a lighter electrical load.
General shoe recommendation:
It is impossible to make a recommendation on YOUR grinding job. Every job is different.
But most jobs with a Cub style grinder can achieve good results with:
Tips:
Dampening the concrete before grinding, or even spraying a little water may assist with your job ( be careful mixing water with electricity - use an RCD). It will make a grinding paste.
Similarly, clean builders sand on the surface, or reducing dust extraction, will help the grinding process.
A grinding compound such as Worx+ Totally Cut Sikk can assist grinding.
Do not let segments get too hot. Over heating will cause slower grinding and the segments will glaze over.
To stop them glazing, spray a little water on the concrete
If the segments glaze up, adding clean builders sand to the surface can open up the segments again.
Remember - every job is different. The enormous combinations of different types of surfaces, different cup wheel styles, with many different bonds and grits, plus different machines and varied operator experience means it is impossible to guess what will give the perfect result the first time. Some experimentation is often necessary to achieve the required results.
Videos:
For tips on grinding very hard concrete see a 15 minute Youtube video here
This is an American video, showing a whole job from start to finish with commercial sized machines. 25 minutes.
3.30 to 4.40 shows all the different grit and bond shoes a pro carries to suit all different concrete jobs.
They did 2 grinds on #40 and one at #80 to expose the aggregate, then finished at #150 to #800 resin polishing pads.
You judge the result - it would be impossible to predict it.
Video
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