Model NO.: 28*8mm
Color: Customizable
Hole: Customizable
Logo: Customizable
Hardness: 38-43HRC / 43-48HRC
Trademark: Hongri
Transport Package: Pallet
Specification: 28 inches
Origin: China
HS Code: 84329000
Material: | 65Mn, Boron steel |
Hardness: | HRC 38-45, HRC 43-48 |
Thickness: | 3.0-12.5 mm |
Size/Dimension: | 12"-44" (300mm-1120mm) |
Edge of Disc Blade: | Round or Notched |
Shape: | Flat, Concave or Wavy |
MOQ: | 100 pcs |
Production Capacity: | 7 million pcs annually |
Surface Treatment: | Painting |
Colors: | Blue or black (matte or glossy), customizable |
Hole Type: | Square, Round, Hexagon, Clover Leaf, Optional |
Hole Size: | 27x27mm, 42x42mm, optional |
Working Depth: | 200mm, 300mm |
Working Width: | 3.4m ~ 6.2m |
Packing: | Non-fumigation wooden case, metal case according to regional policy |
Feature/Characteristic: | High wear resistance due to special edge making process |
Disc blades are suitable for disc harrows and agricultural machinery. Typically made from 65Mn spring steel and 40MnB steel. The standard hardness of 65Mn is 38-45HRC, while 40MnB is 43-48HRC. We can produce a wide range of disc blades with a maximum diameter of 46 inches (1170mm).
Common Specifications of Disc | |||
Dia. | Concavity | Thickness | |
mm | inch | mm | mm |
255 | 10 | 12 | 3 |
305 | 12 | 19 | 3 |
330 | 13 | 25 | 3 |
355 | 14 | 38 | 3 |
410 | 15 | 38~50 | 3 |
430 | 17 | 57 | 3,4 |
460 | 18 | 38~60 | 3,4 |
480 | 19 | 57 | 3,4 |
510 | 20 | 44~63 | 3,4,5 |
535 | 21 | 63 | 3,4,5 |
560 | 22 | 60~85 | 4,5,6 |
585 | 23 | 75~90 | 4,5.6 |
610 | 24 | 75~95 | 4,5,6 |
660 | 26 | 86~115 | 5,6,7,8 |
710 | 28 | 100~130 | 5,6,7,8 |
760 | 30 | 120~135 | 6,7,8,10,12 |
810 | 32 | 120~140 | 8,10,12 |
910 | 36 | 120-200 | 8,10,12 |
960 | 38 | 120-200 | 8,10,12 |



Our Company:
HongRi Machinery Co., Ltd (HRC) is located in Shiliwang Industrial Park, established in 2006, adjacent to the 101 National Highway, just 10 km from the Beijing-Shanghai High Speed Road, offering convenient transportation. The company covers an area of 32,000 square meters, with a construction area of 15,000 square meters.
With over 20 years of experience in agricultural machinery, including disc harrows, disc plows, and disc blades, we specialize in developing and producing high-quality farming equipment. Our products include tillage machines, planting machines, harvesting machines, disc harrows, disc plows, mowers, rotary tillers, deep plowing machines, and their spare parts such as disc blades, bale spears, sweepers, and castings.
Our products are widely sold throughout China and exported to Europe, Africa, the Middle East, and Southeast Asia. Our business integrity and product quality have been recognized, and we have maintained a Level A payment rating and a Level AA bank credit rating. The government has also supported our company, awarding us multiple honors.
We take pride in our reliable quality, attentive after-sales service, and excellent technical support. We welcome your inquiries, consultations, and investigations. Our commitment to honesty and mutual benefit helps us build the Hong Ri brand to serve you better.
Have a great day! Thank you.
If you have any questions, feel free to contact me.

Our reliable quality, considerate after-service, and excellent technology welcome your inquiry, consultation, and investigation. The company abides by the principle of honesty, striving for win-win outcomes, and building the Hong Ri brand to serve you.
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