Q: What type of centre hole options available for the harrow disc blades?
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According to the centre hole options, you can choose:
Round centre hole harrow disc blade
Sq.xRd centre hold harrow disc blade
Sq.xSq ( Star) centre hole harrow disc blade
Square centre hole harrow disc blade
1 Inch Square hole – harrow disc blade available
1-1/2 Inch Round hole – harrow disc blade available
1-1/2 Inch Square hole – harrow disc blade available
1-1/4 Inch Round hole – harrow disc blade available
1-1/4 Inch Square hole – harrow disc blade available
1-1/8 Inch Round hole – harrow disc blade available
1-1/8 Inch Square hole – harrow disc blade available
1-5/8 Inch Round hole – harrow disc blade available
2-1/8 Inch Round hole – harrow disc blade available
If need customized harrow disc blades based on your specific requirements. Please contact us. |
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Q: What diameter options available for the harrow disc blades?
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2 1/4 Inch Diameter- harrow disc blade available
2 Inch Diameter- harrow disc blade available
14 Inch Diameter- harrow disc blade available
16 Inch Diameter- harrow disc blade available
18 Inch Diameter- harrow disc blade available
20 Inch Diameter- harrow disc blade available
22 Inch Diameter- harrow disc blade available
24 Inch Diameter- harrow disc blade available
26 Inch Diameter- harrow disc blade available
28 Inch Diameter- harrow disc blade available
30 Inch Diameter- harrow disc blade available
32 Inch Diameter- harrow disc blade available
If need customized harrow disc blades based on your specific requirements. Please contact us. |

Q: What thickness options available for the harrow disc blades
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3.0MM harrow disc blades
3.5MM harrow disc blades
4.5MM harrow disc blades
5.0MM harrow disc blades
6.0MM harrow disc blades
If need customized harrow disc blades based on your specific requirements. Please contact us. |
Q: What type of material was selected for the harrow disc blades?
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Usually Boron Steel 15B26 |

Q: What type Rockwell Hardness are for the harrow disc blades?
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38-42 Rockwell Scale |
Q: Notched disc blades vs smooth, which one is better?
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Simply say, it depends on your soil conditions.
Notched disc blades namely have notched edge, its notched impact strength offers much more aggressive cutting edge for chopping through the crop’s residues and hard soil. Plain disc blades have a smooth edge, which is usually chosen for the cultivation after the solid ploughed. |

Harrow Disc Blade — The Ultimate FAQ Guide
Cothda Agri Supply is one of the most competitive harrow disc blade manufacturers from China and offers its services internationally.
At Cothda, we have different harrow disc blade models available in different thicknesses, hole design, and size that fits perfectly for the majority of combine harvesters.
Our 15+ years of field experience and experienced staff make sure that our harrow disc blade will have impressive corrosion resistance with a polished finish as well as heat-treated and rust-proof.
This FAQ guide will help you understand the knowledge that is considered crucial in the harrow disc blade topic, and that will help you make the right decision.
What is Harrow Disc Blade?
Harrow disc blade is generally an agricultural tool that is mostly utilized to break or smoothen the soil surface.
After a complete process of tillage, the harrow disc blade is used.
Harrow disc blade gives you the final and exceptional soil surface finish that is sometimes extremely important.
Additionally, the harrow disc blade is completely able to offer a soil structure that is appropriate to be used as a seedbed.
In order to understand it more clearly, it is a tool that also helps to break the lumps of your soil, known as clods.
The core purpose of utilizing a harrow disc blade is only to disturb a narrow trail of the soil to kill weeds or skirt the crop rows.

Figure 1: Harrow Disc Blades
What are the Applications of Harrow Disc Blade?
At Cothda Agri Supply, our facility is equipped with state-of-the-art technology and tools to manufacture top-tier high-quality harrow disc blades.
Harrow disc blade can be used for many applications, and some of them are the following:
- Use to break virgin land
- To Chop soil materials and combine them with topsoil
- To Accelerate the decay of the dead plant material
- A lighter secondary harrow disc blade is used to remove/eliminate the clumps and loosen the packed soil
- To breakdown the soil clods into small chunks
- Increase the penetration of the water
- To increase the soil aeration
- To increase the activity of soil biota
Furthermore, the use of a harrow disc blade becomes important at the end because it can create a seedbed that is highly suitable for planting.
It is also used to chop up the cornstalks that are left behind.
Additionally, it’s also used before the plowing process to ease the work on your soil.
Moreover, using a harrow disc blade significantly reduces the clogging and a complete turning of soil during the plowing.

Figure 2: Harrow Disc Blades Ready to Break the Soil
What are the Benefits of Using Harrow Disc Blade?
A harrow disc blade is considered an advanced farm implement that is mostly utilized to cultivate the soil.
In addition to cultivating the soil, a harrow disc blade can have many potential benefits, and some of them are the following:
- It can kill unwanted plants
- Its sharp steel blades chop up weeds perfectly
- Allows you to rapidly clear your soil from any unwanted weeds, crops, or crop remains and with extreme efficiency and precision
- Our top-tier steel can increase its performance
- It’s affordable
- It shuffles your soil
- Allows new crops to grow faster and bigger
- Can eliminate remaining clumps of soil easily
- Loosen the soil that is packed together sue to irrigation or rain
Moreover, there can be a lot more, and at Cothda Agri Supply, you can have your dream harrow disc blade.
How You Manufacture Harrow Disc Blade?
Cothda Agri Supply is known as one of the reliable sources of manufacturing the harrow disc blade.
The way we manufacture the harrow disc blade is advanced and fully optimized that also becomes the reason for us to be cost-effective.
Our 15+ years of field experience and skilled staff are confident to ensure that our harrow disc blade is flawless and standard.
We always use the best quality material, high-grade machines, and qualified staff.
Each of our products, plus our environment, is eco-friendly.
Additionally, Cothda offers you the choice of full customization of your harrow disc blade so that you can get exactly what you are after.
At Cothda Agri Supply, nothing is more important to us than your satisfaction, and we satisfy you through our high-quality manufacturing and material choice.
Please let us know if you are interested in more details about the way we manufacture the harrow disc blade.
Figure 4: Custom harrow Disc Blades
How You Improve the Harrow Disc Blade Performance?
Supreme quality and your complete satisfaction are Cothda Agri Supply utmost priority, and we give you excellent harrow disc blade services through:
- Our cutting-edge technology
- State-of-the-art machinery
- Cost-effective and eco-friendly manufacturing
- Quality Standard Products
- The exceptionally experienced staff of engineers
We at Cothda dedicated ourselves to output international standard harrow disc blades at a reasonable price.
Our prime motto is to produce flawless high-quality harrow disc blade for you.
In the end, after successfully manufacturing the harrow disc blade, our QA staff quality test every single piece and declare its performance and quality.
Figure 5: Cothda Manufactured Harrow Disc Blades
What is the Life-Span of Harrow Disc Blade?
With the passage of time, we adopted new technologies, and our harrow disc blade from today is a lot stronger than any other of our competitors.
Additionally, the manufacturing process of the harrow disc blade became so advanced that it can produce disc harrows that can last a lifetime compared to what they were worth 20 years from now.
What Cothda Agri Supply do to enhance the quality of our harrow disc blade to enhance its life is that we do scientific testing of each of our piece to confirm top quality.
In this way, we can be certain that our harrow disc blade can last 20+ years easily without requiring any maintenance and losing the performance.
Figure 6: Top-Quality Manufactured Harrow Disc Blades
How Much Harrow Disc Blade Costs?
There is nothing more effective than a harrow disc blade for your soil preparation, weed abatement, and mixing of harvest residues.
At Cothda Agri Supply, we waste little to no material in harrow disc blade manufacturing so you can get cost-effective solutions to your needs.
The price of a harrow disc blade can depend on its size, thickness, weight, working width, and surface finishing.
There are also many custom options that enable you to get your customized harrow disc blade for your particular application.
For example, a simple 16″ diameter x 4.0mm thickness notched harrow disc blade with a start mounting hole accommodating both 1″ and 1-1/8″ square disc axles can cost you >$60.
What are the Characteristics of Harrow Disc Blade?
Cothda Agri Supply also acts as manufacturer and exporter of harrow disc blade including all type of agriculture machinery and related parts.
Our cost-effective way and high-performance parts can fulfill your every requirement.
The following are some characteristics that are a part of our harrow disc blade:
- Good Elasticity
- High Hardness
- Strong Wear Resistance
- Shock-, Heat-, Fire-, and Water-Resistant
- Corrosion-Resistant
- Cost-Effective
- Reliable and Efficient
Furthermore, it’s important to know the diameter, thickness, harrow disc blade weight, and concavity because these things can only define your needs and enable us to know what you required.
What are the Types of Harrow Disc Blade?
At Cothda Agri Supply, we offer hundreds of custom options for your harrow disc blade and believe that quality is the touchstone of success and performance.
We follow a standardized quality control policy as per which all the harrow disc blades are manufactured and tested in detail.
These quality check tests contain precision and accuracy checking of thickness, size, weight, dimensions, performance, flaw checking, and overall quality exactly according to your requirements.
There are many types of harrow disc blades we offer, and some of the potential ones are the following:
- Plain Harrow Disc Blade
- Notched
- Concave
- Conical
- Fluted
- Come
- Flat Center
- Fluted Coulter
- Center Less
- Flat/Coulter
- Wavy Coulter
- Filler
- Tine
- Spring-Tooth
- Drag
- Spike
- Chain
Moreover, Cothda is able to manufacture the harrow disc blade in your custom shape also.
Figure 9: Different Harrow Disc Blade Types
What are the Types of Harrow Disc Blade Center Holes?
The center holes of the harrow disc blade are important to consider because these can define how perfectly your discs can fit on your machinery.
At Cothda Agri Supply, we make sure that you get every kind of harrow disc blade center hole, so you never run out of options.
The following are some important harrow disc blade center hole types:
- Round Center Hole
- Square
- Square Round
- Square Clover Leaf
- Hexagonal Clover Leaf
- Hexagonal
- Rectangular Clover Leaf
- Round Square Clover Leaf
- Dual Square
- Dual Square Clover Leaf
- Key Hole
Additionally, do not limit yourself to these and contact us in case you have custom requirements for your harrow disc blade center hole.
Figure 10: Different Harrow Disc Blade Center Hole Types
What is the Minimum and Maximum Thickness of Harrow Disc Blade?
Mostly the harrow disc blade is manufactured using high carbon steel or boron steel.
It’s important to know the material because it can depend on the maximum and minimum thickness of your harrow disc blade.
At Cothda Agri Supply, our harrow disc blade thickness can be from 3mm minimum to 14mm maximum.
All harrow disc blades received heat treatment to enhance their strength and wear resistance.
In case your harrow disc blades are going to encounter solid rocks, boulders, and other tough obstructions while cutting through the soil, maximum thicknesses are preferred.
However, in order to increase the durability and precision of your harrow disc blades, so they cut the soil precisely, then minimum thicknesses are preferred.
Most importantly, you can have your preferred thickness, but the following are some standard ones for your harrow disc blade:
How to Choose the Right Blade Type for Harrow Disc Blade?
There are some things that are important to know before choosing a new harrow disc blade that fits perfectly for your operation.
You either can have notched (cutout) or solid (smooth) blades for your harrow disc.
It is based on your soil type that which type fits you perfectly and can operate accurately.
Sandy, loose, or typically dry soils are very easy to cut through and do not even require that much effort.
A smooth (solid) harrow disc blade is perfect for these types of soils and can cut the soil like a knife, leaving an even and leveled surface behind.
At Cothda Agri Supply, our experts know that the smooth harrow disc blades are better than cutout harrow disc blades in most cases.
Because smooth harrow disc blades have more surface area as well as lending more cutting power to the unit as a whole.
Moreover, the “gumbo” soils require a cutout harrow disc blade to work perfectly.
It keeps rotating and leaving the more irregular surface with larger clods and is considered the best choice.
What are Diameter Options Available for Harrow Disc Blade?
It’s important to know that in order to break a virgin land, a heavy-duty, robust, and high-performance harrow disc blade is required.
Furthermore, that harrow disc blade is required to have disc spacing of 10″, 14″, or 18″ with addition to a large diameter of 26″, 28″, 30″, 32″, 36″, and 40″.
Furthermore, the standard diameter options for harrow disc blade are the following:
- 2″
- 50″
- 14″
- 16″
- 18″
- 20″
- 22″
- 24″
- 26″
- 28″
- 30″
- 32″
In case you required a custom diameter for your harrow disc blade based on your specific requirements, we are just a call away and will assist you in a perfect way.
What is the Notched Harrow Disc Blade?
It is also called a cutout harrow disc blade, and this type is stronger and robust than any other type of harrow disc blade out there in the market.
Its strong build and robust structure make the notched harrow disc blade able to cut thoroughly if there are meaty and chunky crops on the ground.
Our experts prefer using a notched harrow disc blade when you want the soil to be completely pulverized.
In case your requirements include harrowing through rocky and chunky soil, there is nothing best than a notched harrow disc blade to tackle this task.
Furthermore, it’s also important to know that a notched (cutout) harrow disc blade is more vulnerable against rocky soil but as well as most effective against it.
What is the Smooth Harrow Disc Blade?
It is also known as plain or solid harrow disc blade.
In general, all of our harrow disc blades are cost-effective, but a smooth harrow disc blade is cheaper.
The signature look of a plain harrow disc blade is it’s a complete circle with a blade edge.
It contains smooth blades that are considered perfect for sandy soil.
Our experts prefer a plain harrow disc blade when your target is to break the soil in a way so that the structure and surface of the soil remain the same.
Some crops can require this kind of soil, and it is helpful for the ground that is not completely pulverized.
At Cothda Agri Supply, we use solid, high-quality material to manufacture smooth harrow disc blade so it requires little to no maintenance and can remain sharp for a long time.
Our plain harrow disc blade is also less vulnerable to clay or rocky soil.
What is the Difference Between Notched and Smooth Harrow Disc Blade?
Smooth and notched harrow disc blades are different in many ways, and the most important is their uses.
Their general structure is also very different; the smooth is circular plain harrow disc blade, and the notched is with many cutouts.
The smooth harrow disc blade is used to maintain the structure of the soil and after the soil is completely broken up.
Furthermore, the planting grounds that are not completely pulverized also require the touch of a smooth harrow disc blade.
However, the smooth harrow disc blade is less vulnerable to clay or rocky soil than the other one.
On the other hand, the notched harrow disc blade is much more powerful because of its unique and efficient design.
The main reason to utilize a notched harrow disc blade is to completely pulverize the soul, so the crops remain better.
There is nothing more efficient in professional use than a notched harrow disc blade.
If your requirements include pulling, both harrow disc blades are perfect.
Figure 16: Notched and Smooth Harrow Disc Blades
Why is Harrow Disc Blade kelp at an Offset Angle?
The implementation of the harrow disc blade can affect its outcome completely.
Mostly harrow disc blades are kept at a slightly offset angle so that these are not parallel to the implement.
In order to repeatedly slice up the soil efficiently, the offset angle is used to make sure.
Doing so reduces the difficulties of slicing any ground and help extremely improve the results.
Additionally, this way, the harrow disc blade can cut lighter and shallower.
Most importantly, to get the best possible results, choose the most appropriate harrow disc blade size and concavity and find the optimum angle for your implementation.
What is a Double-Action Harrow Disc Blade?
It’s the name of the concept where you don’t have to choose between smooth or notched harrow disc blades.
You can choose the double-action harrow disc blade that can work perfectly and facilitate you with both types.
It mainly consists of the front and rear gang. The notched harrow disc blade can fit perfectly in front gangs, and the smooth harrow disc blade can fit in rear gangs.
This structure is the best because, in this way, you can have the best possible output.
The notched harrow disc blade in front gangs will cut the stalk properly, and the smooth harrow disc blade on rear gangs will smoothen the soil.
How is the Harrow Disc Blade Measured?
To improve the process of displacement and to aerate the soil, the depth of your harrow disc blade curvature plays an important role.
Hence, understand and measure the harrow disc blade completely is crucial.
The concavity of your harrow disc blade can be measured easily by placing it on a flat surface.
Make sure the cutting edges of your harrow disc blade is down and start the measurement from the center hole to the inside edge.
The majority of the people also believe that the kind of harrow disc blade you should choose depends on its assembly.
Harrow disc blade can be measured by its type, its assembly, its attachment, its axes, or its center holes.
Figure 19: Manufacturing of a Perfectly Measured Harrow Disc Blade
What is the Difference Between Harrow Disc Blade and Plow Disc Blade?
The main purpose of using a plow disc blade is for primary tillage, and this disc is connected to the stub axis.
Furthermore, after its use, the soil became uneven and results in soil clods.
On the other hand, the harrow disc blade is secondary tillage, and its use can result in an even topography and no soil clods.
Additionally, both disc blades have a different appearance, linkage, usage, and design.
You should use the harrow disc blade to till the disc plow turned land and the other one to till the uncultivated land.
How Harrow Disc Blade Helps Reducing the Acid Saturation in the Topsoil?
The best way to reduce the acid saturation of your soil is through the method of mixing agricultural lime with agricultural gypsum.
And this mixing method can only be performed accurately with the use of the harrow disc blade.
A perfect 50/50 agricultural mix can be achieved through the harrow disc blade.
Reducing the acid saturation of your topsoil is extremely important to enhance your productivity, and that shows the importance of the harrow disc blade.
The use of a harrow disc blade enables you to achieve a strong and healthy root development.
How can Harrow Disc Blade be Used in the Event of a Wildfire?
It’s important to understand how the harrow disc blade can be useful in the event of a wildfire because farmers can be challenged by versatile environmental conditions.
Harrow disc blade can create a space, draw a line, or firebreak between the fields by circling the field.
Using the harrow disc blade can limit the wildfire area and limit its spread also.
Now you know how the harrow disc blade can stop the spread of fire perfectly and rapidly.
What are the Requirements of Harrow Disc Blade?
Your harrow disc blade can have many requirements, and these must be checked before taking it into your fields.
What you required before utilizing the harrow disc blade is mentioned below:
- Make sure your machinery supports the harrow disc blade of the same concavity and thickness
- Briefly examine the frame of the harrow disc blade
- Make sure your custom harrow disc blade bearing and bushing can fit perfectly
- The disc center of your harrow disc blade should align perfectly with spacing spools
- Make sure the gang bolts are durable and large enough to be held perfectly
- Make sure the easy control over the harrow disc blade angling controls
- Check the correct angle and concavity
Moreover, you don’t have to worry about these requirements, but they are important for you to acknowledge before we will take care of these requirements perfectly.
At Cothda Agri Supply, we will make sure that your custom harrow disc blade can perfectly fit and based on these requirements.
Figure 23: Harrow Disc Blades as a Perfect Solution for your Needs