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Combine Harvester Cutter Blades: The Heart of the Harvest
The cutter bar, armed with a series of reciprocating blades, is the critical first point of contact in the harvesting process. These blades are the unsung heroes of the modern farm, performing the essential task of cleanly shearing crops like wheat, barley, corn, and rice at their base. Their precision and durability are paramount to the efficiency of the entire machine.
TMR-02
YAFEI
YFMB25100
| Quantity: | |
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Shredder Blades and Saw Knives for Forage Harvesters
In the mechanized harvesting and processing of silage and forage, the performance of the harvester’s core cutting component—the cutting blades—directly determines operational efficiency and feed quality. Yafei Company has deep industry expertise. Based on the physiological characteristics of different crops (such as corn, forage, alfalfa, etc.) and diverse field conditions (including complex environments like lodging, moisture, and weeds), Yafei scientifically designs blade types, functions, and materials, committed to providing a solid foundation for efficient and reliable harvesting operations.
Yafei Company produces blades with strong compatibility, offering replacement blades for many mainstream harvester brands worldwide, including but not limited to the following brands and models: BISO, CNH, Claas, Deutz Fahr, Dronningborg, John Deere, New Holland, Kemper, KPAB, Krone, Laverda, Massey Ferguson, and others.
I. Classification of blades
Cutter Blades (Hammer Blades)
As the core execution component of the cutting system, cutter blades perform high-speed rotation to deliver powerful impact and cutting on materials. The blade edge adopts a specially calculated geometric edge design combined with an optimized cutting angle, resulting in minimal resistance during entry and effective tearing and initial crushing of fibrous materials. This design significantly improves processing capacity per unit time and ensures clean cuts in the feed, maximizing the retention of nutritional value. The blades are typically deep-hardened, providing extremely high wear resistance and impact toughness to handle hard impurities that may be mixed in he feed.
Shear Bar (Counter Knife)
The shear bar, also known as the bed knife or stationary knife, is fixed below the feed inlet, forming a precise shear pair with the high-speed rotating cutter blades. Its core function is to work in tandem with the cutter blades, performing scissor-like precise cutting on long-stemmed materials, ensuring uniform material length and avoiding overly long fibers. The straightness and flatness of the shear bar's edge are ensured through precision machining to maintain an extremely small and uniform gap with the cutter blades along the entire length. This micron-level gap control is the technical key to achieving excellent chopping quality, reducing power loss, and minimizing abnormal blade wear.
Serrated Blades
For high-stalk, high-hardness crops such as silage corn and sorghum, Yafei provides dedicated serrated blades. These blades feature an innovative serrated edge design where each tooth acts as a tiny hook, processing materials through a combined "sawing" and "pulling" action. This design effectively severs tough plant cortex and fiber bundles, overcoming issues like winding and clogging that smooth-edge blades often encounter when processing such materials. Serrated blades significantly enhance the equipment's adaptability to diverse crops, processing smoothness, and discharge uniformity.
II. Blade Material Science
Yafei's pursuit of blade performance extends to the material level. Based on the functional characteristics and stress conditions of different blades, specialty steels are carefully selected and applied:
• High-Carbon Tool Steel: Commonly used for manufacturing shear bars. Through appropriate heat treatment, this type of steel achieves high hardness and excellent wear resistance while maintaining good machinability, ensuring the blade edge remains sharp under long-term stable shearing action.
• High-Quality Spring Steel: Typical examples like 65Mn, known for their outstanding elasticity and fatigue strength, are ideal for manufacturing cutter blades that withstand periodic impact loads. They effectively prevent chipping when striking hard objects and, through heat treatment, achieve a perfect combination of high surface hardness and high core toughness.
• Tungsten Carbide Materials and Laser Cladding Technology: For the most severe wear conditions (e.g., when processing crops rich in silica or sandy soil), Yafei applies carbide materials (such as tungsten carbide) to the cutting edges of critical blades as wear-resistant layers or uses them to manufacture entire blades. Advanced processes like vacuum brazing, high-frequency welding, or laser cladding technology are used to firmly bond the carbide material to the blade base material. Laser cladding technology further achieves a metallurgical bond between the wear-resistant layer and the base material, resulting in a dense and uniform coating. This "rigid yet flexible" design gives the blade extreme wear life while allowing the base material to absorb impact energy and prevent brittle fracture. This is particularly suitable for extending service life in harsh operating environments, significantly reducing replacement frequency and overall operating costs.
Shredder Blades and Saw Knives for Forage Harvesters
In the mechanized harvesting and processing of silage and forage, the performance of the harvester’s core cutting component—the cutting blades—directly determines operational efficiency and feed quality. Yafei Company has deep industry expertise. Based on the physiological characteristics of different crops (such as corn, forage, alfalfa, etc.) and diverse field conditions (including complex environments like lodging, moisture, and weeds), Yafei scientifically designs blade types, functions, and materials, committed to providing a solid foundation for efficient and reliable harvesting operations.
Yafei Company produces blades with strong compatibility, offering replacement blades for many mainstream harvester brands worldwide, including but not limited to the following brands and models: BISO, CNH, Claas, Deutz Fahr, Dronningborg, John Deere, New Holland, Kemper, KPAB, Krone, Laverda, Massey Ferguson, and others.
I. Classification of blades
Cutter Blades (Hammer Blades)
As the core execution component of the cutting system, cutter blades perform high-speed rotation to deliver powerful impact and cutting on materials. The blade edge adopts a specially calculated geometric edge design combined with an optimized cutting angle, resulting in minimal resistance during entry and effective tearing and initial crushing of fibrous materials. This design significantly improves processing capacity per unit time and ensures clean cuts in the feed, maximizing the retention of nutritional value. The blades are typically deep-hardened, providing extremely high wear resistance and impact toughness to handle hard impurities that may be mixed in he feed.
Shear Bar (Counter Knife)
The shear bar, also known as the bed knife or stationary knife, is fixed below the feed inlet, forming a precise shear pair with the high-speed rotating cutter blades. Its core function is to work in tandem with the cutter blades, performing scissor-like precise cutting on long-stemmed materials, ensuring uniform material length and avoiding overly long fibers. The straightness and flatness of the shear bar's edge are ensured through precision machining to maintain an extremely small and uniform gap with the cutter blades along the entire length. This micron-level gap control is the technical key to achieving excellent chopping quality, reducing power loss, and minimizing abnormal blade wear.
Serrated Blades
For high-stalk, high-hardness crops such as silage corn and sorghum, Yafei provides dedicated serrated blades. These blades feature an innovative serrated edge design where each tooth acts as a tiny hook, processing materials through a combined "sawing" and "pulling" action. This design effectively severs tough plant cortex and fiber bundles, overcoming issues like winding and clogging that smooth-edge blades often encounter when processing such materials. Serrated blades significantly enhance the equipment's adaptability to diverse crops, processing smoothness, and discharge uniformity.
II. Blade Material Science
Yafei's pursuit of blade performance extends to the material level. Based on the functional characteristics and stress conditions of different blades, specialty steels are carefully selected and applied:
• High-Carbon Tool Steel: Commonly used for manufacturing shear bars. Through appropriate heat treatment, this type of steel achieves high hardness and excellent wear resistance while maintaining good machinability, ensuring the blade edge remains sharp under long-term stable shearing action.
• High-Quality Spring Steel: Typical examples like 65Mn, known for their outstanding elasticity and fatigue strength, are ideal for manufacturing cutter blades that withstand periodic impact loads. They effectively prevent chipping when striking hard objects and, through heat treatment, achieve a perfect combination of high surface hardness and high core toughness.
• Tungsten Carbide Materials and Laser Cladding Technology: For the most severe wear conditions (e.g., when processing crops rich in silica or sandy soil), Yafei applies carbide materials (such as tungsten carbide) to the cutting edges of critical blades as wear-resistant layers or uses them to manufacture entire blades. Advanced processes like vacuum brazing, high-frequency welding, or laser cladding technology are used to firmly bond the carbide material to the blade base material. Laser cladding technology further achieves a metallurgical bond between the wear-resistant layer and the base material, resulting in a dense and uniform coating. This "rigid yet flexible" design gives the blade extreme wear life while allowing the base material to absorb impact energy and prevent brittle fracture. This is particularly suitable for extending service life in harsh operating environments, significantly reducing replacement frequency and overall operating costs.
