5 Best Angle Grinder Discs in 2021 – Tested & Compared

Have you been wondering where to get the best angle grinder discs for your grinder? If so then this review will help you. For months, I have been looking for a replacement for my angle grinder discs and all I came across were fake products which resembled the original discs.

I decided to come up with this list of top-rated angle grinder discs in the market to help people like you chose the right one for their grinders.

Best Angle Grinder Discs – Reviews

1. DEWALT DW4523 Purpose Metal Grinding Wheel

Dewalt DW4523 is a metal grinding discs which cannot be left out when talking about the angle grinder discs. It is a four and a half inch by a quarter by five-eighth general purpose metal grinding wheel with maximum revolutions per minute of 13,300.

Solid Construction

A solid construction of Aluminum Oxide is included on this disc to make it a high-performing grinder disc. This will ensure not only ensure maximum performance but will also enhance the durability of the wheel.

High Grain Concentration

The construction of the disc is highly dense with abrasive grains. This is so to ensure an aggressive grinding action and smooth running of wheels. This, in turn, gives the disc a long life and a high material removal rate.


The disc is reinforced with a proprietary material mix to ensure durability. Aluminum oxide in the design also contributes a lot to this durability.

Reliable and Safe to Use

The disc is safe and reliable to use. This has been enhanced by the three full sheets of fiberglass which is included when you buy it. The maximum speed is 13,300 rpm, this is within a range not to injure the operator.

2. Hiltex 20 Angle Grinder Flap Discs 4-1/2″ Flat 80 Grit 7/8″

The second type of grinder disc under my best angle grinders is 20 Angle Grinder Flap Discs. They are very cheap, reliable and compatible with any grinder. The flap discs are ideal for smooth job finishing. The following are some of the features it has.

Max Speed of 13,300 rpm

Speed is a matter of consideration for any grinding activities. A higher speed will ensure quicker removal of stock of cuttings.

With a speed of 13,300 rpm, this grinding disc is capable of doing far much great job.


A durable disc is what matters in any grinding machine since it will save you on the cash spent on replacement. For this reason, this disc is made of a phenolic resin material backing to offer durability and reinforcement over time.

Relatively Cheap

These discs are sold in packs of twenty making it a greater choice price wise.The cost of buying a disc every time you want a replacement is eliminated here.


This grinding disc is safe to use. You will not get injuries arising from its use since it comes with a resin fiberglass to protect the user from any injury. In conclusion, this disc is ideal for use in grinding and finishing work surfaces.

3. DEWALT DW4518 General Purpose Metal Cutting Wheel

This is a general purpose grinding metal wheel in the market. It is among the cheapest of the DEWALT products that you should consider buying if for your grinder if you don’t want your pocket to be depleted.

High-performance Aluminum Oxide

Just like the above-discussed DEWALT disc, this one too has a high-performance aluminum oxide purposely infused with it to…

increase its practical performance. It is therefore suited for high material removal and lifelong stay.

Unique Design

The design is such that the wheels can run smoothly under operation. In addition to this, high grain concentration has been added for aggressive grinding actions to be achieved.

Max Speed

When you insert this disc in your grinder, the maximum speed it can attain is 13,300 rpm. Beyond this, you risk breaking it, and the functionality will be compromised. The speed is within an acceptable range of safe operation.


Despite the disc being cheap, its safety in operation is not compromised. It has a proprietary material mix and three full sheets of fiberglass. All these are meant to ensure safety and durability of the operator and the machine.

4. DEWALT DW8061B5 Metal and Stainless Cutting Wheel

Here is another grinder wheel from DEWALT you should consider as the best angle grinder disc in the market. It is affordable, reliable, and safe to use and above all durable. Consider the following features it has and decided whether it meets your expectations.

Deep Penetration

This grinder disc is ultra-thin making it have a deep penetration to the work piece. It is 0.045 inch thin designed for fast burr free cutting.

This feature will help in faster grinding of the thick work piece

Aggressive Cutting Action

The wheel is made of a proprietary aluminum oxide grain combination meant for aggressive cutting action. It is thus good for faster cutting of a work piece and will give you high efficiency.


The grinder disc is durable over time. This is enhanced by the material used in building it. The Proprietary material mix ensures this durability is achieved.


It is safe as usual to the DEWALT grinder discs. It is made of two full sheets of fiberglass to aid this safety issue despite it being cheap; safety is not compromised.

5. DEWALT DW8310 Grit Zirconia Angle Grinder

Unlike the DEWALT disc I have described above, this disc is an outstanding one made of Zirconia grit and not resin to allow it for three times faster material removal.It is reliable, relatively cheap and so it is affordable, durable and gives the best result. Consider the below features it has.

Zirconia Grit

As I mentioned under factors to consider when buying the best disc, material to be grounded was a consideration.

With Zirconia grit, you will be able to grind steel and steel alloys comfortably. Also, this type of grit offers three times faster material removal than fiber resin metal sanding discs.

Longer Life

This is the most durable of all. It is made of a premium abrasive cloth. This cloth provides up to fifteen times longer life than fiber resin. It is therefore very effective and durable.

Max Speed

The maximum speed allowed when using this grinder is 13,000 revolutions per minute. Beyond this, you risk breaking it, and the functionality will be compromised. The speed is within an acceptable range of safe operation.

Type 29 Fiberglass

It is made of type 29 fiberglass backing which provides a grinding angle of twenty to thirty degrees.

Angle Grinder Discs Buying Guide

The following are some of the factors to put into considerations when purchasing the good quality angle grinder discs.

Material to be Ground

This is the first consideration. It will determine the abrasive you will require in your disc.

For instance, zirconia alumina or aluminum oxide should be used for grinding steels and steel alloys while silicon carbide abrasive should be used for grinding non-ferrous metal, cast iron, and non-metallic materials.

For hard and brittle materials, a wheel with a fine grit and a softer grade will be appropriate whereas, for a softer material, a wheel with a coarse grit and hard grade will be appropriate for the job.

Amount of Stock to be Remove

The amount of stock to remove during cutting is another important consideration worth mentioning. For rapid stock removal, you will require a disc with greater penetrations and heavier cuts. This will be determined by the size of the grit.

A coarser one is capable of greater penetration and heavier cuts while a slightly finer one will give a faster cut since there are more cutting points to the work and it is suitable for hard-to-penetrate materials.

Therefore, if a small amount of stock is to be removed, discs made of rubber, resin or shellac bonds should be chosen otherwise those with vitrified bonds should be used.

Wheel Speed

Wheel speed under operation is another consideration. Depending on the material you which to grind, you will either go for a highly rated grinder disc or low.

Again this will be determined by the grinders rating. A grinder with lower ratings cannot be used with a disc with higher ratings.

Working at a higher speed will require specially designed discs for high-speed grinding. In either case, you should never exceed the specified rpm on the discs.

Area Under Grinding Contact

When the area of contact between the wheel and the work piece is broad, it will be wise to go for a wheel with a coarser grit and a softer grade. However, if it is small, wheels with finer grits and harder grades to withstand great unit pressure will be appropriate.

Other Considerations

  • Grinding machine horsepower
  • Severity of the grinding action
  • Price of the disc
  • Ease of care and feeding

Final Words

Having looked the above five grinders, you should now be having a clue of what a good grinder disc should have and what it should not have.

The factors to put into considerations as mentioned above are also very important, and you should always remember them whenever you plan to purchase a news grinder disc or whenever you want to replace an old grinder’ disc.

It is a wise idea to have knowledge of what you plan to purchase so as to avoid con and dishonest traders in the market. With this kind of information, I believe you will get the best angle grinder discs for your grinder. Consider getting at least one from the list and you will never regret your choice.

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