cutting edges and end bits are to suit dozers, scrapers, graders, loaders and excavators
TIGERLEVEL have a complete range of blades, edges and end bits, shanks, teeth, ripper tynes, router bits and plow bolts and nuts to suit virtually every machine. Customer parts can be made to suit specialist requirements.We stock a complete range of thicknesses in standard and heavy duty.Our bits and edges are heat treated through hardened, quenched and tempered alloy steel.
A wide range of grader blades is available in two specifiions
High Carbon steelC80, and 30MnB for
Double bevelled curved
Double bevelled flat
Flat Grader Blades
· Curved Grader Blades
· Serrated Grader Blades
A wide range of cutting edges is available in two specifiions
16Mn, and 30MnB for
Double bevelled Flat
Single bevelled flat
End bits
Blades and cutting edges are the frontline, wear components attached to the leading edges of buckets, blades, and other digging or grading attachments on heavy machinery like excavators, loaders, and bulldozers. They are the primary points of contact with abrasive materials like soil, rock, and rubble, designed to penetrate, cut, and slice through the ground efficiently while protecting the much more expensive base attachment from rapid wear.
1. Key Functions and Importance
Penetration and Efficiency: A sharp, robust cutting edge concentrates force onto a narrow area, significantly reducing the energy required to dig into compacted or frozen material, thereby improving machine productivity and fuel efficiency.
Material Protection: They act as a sacrificial wear part. Instead of the bucket's main body wearing down, the relatively inexpensive and easily replaceable cutting edge absorbs the abrasion.
Load Retention: Properly maintained edges help create a clean cut, allowing the bucket to fill more completely and retain material better during lifting and transport.
Specialized Tasks: Different profiles (e.g., straight, spade-nose, serrated) are optimized for specific applications like grading, trenching, or rock digging.
2. Materials and Manufacturing
Cutting edges and blades are typically made from **high-strength, abrasion-resistant steel (AR steel)**. This steel is alloyed and heat-treated to achieve an optimal balance of:
Surface Hardness: To resist abrasive wear (measured on the Brinell or Rockwell scale).
Core Toughness: To withstand high-impact loads without cracking or breaking.
Manufacturing processes like quenching and temperingare critical to achieving these properties. Some advanced edges may also feature hardfacing—a layer of extremely hard weld material applied to critical wear zones for extended life.
3. Maintenance and Economics
Regular Inspection and Rotation: Straight cutting edges can often be rotated (flipped top to bottom) to utilize both wear surfaces before replacement. End bits and teeth should be checked for excessive wear or breakage.
Timely Replacement: Worn-out edges dramatically increase digging resistance, strain the machine's hydraulic system, accelerate wear on the base bucket, and lead to higher fuel consumption. Replacing them on schedule is a key cost-saving maintenance practice.
Alloy steel blades are cutting tools made from alloy structural steel or alloy tool steel. They are produced through alloy composition optimization and heat treatment processes such as quenching, tempering, and normalizing. Widely used in mechanical machining, mold manufacturing, and hardware cutting, alloy steel blades offer superior performance compared to ordinary carbon steel blades. By adding alloying elements such as chromium, molybdenum, tungsten, vanadium, and manganese, they achieve higher hardness, strength, wear resistance, and heat resistance. Combined with well-designed cutting-edge geometry, these blades provide stable cutting of various metallic and non-metallic materials.
The cutting edge, as the portion directly engaged in cutting, determines cutting efficiency, machining accuracy, and tool life. Its performance depends on geometry, edge treatment, and material properties.
Alloy steel blades typically use alloy tool steels, with common grades including CrWMn, 9CrSi, Cr12MoV, and 6CrW2Si. Alloying elements improve hardenability, red hardness, and impact resistance, making them suitable for turning tools, milling cutters, shear blades, and stamping knives. Compared with high-speed steel or cemented carbide, alloy steel blades offer better toughness, good machinability, and moderate manufacturing costs. They are widely applied in medium- to low-speed cutting, heavy-load severing, and stamping operations.
The performance of alloy steel blades mainly relies on heat treatment. Typical process: forging → annealing → machining → quenching → low-temperature tempering → finishing. Quenching provides high hardness, while tempering relieves internal stress, stabilizes microstructure, and balances hardness with toughness. After proper heat treatment, blade hardness usually reaches HRC58–63, providing sufficient cutting capacity while minimizing chipping and breakage. Some applications may include surface nitriding or overlay welding to further enhance wear resistance and service life.
The cutting edge is the core functional area, and its geometric parameters directly affect cutting performance. Proper edge design reduces cutting forces, minimizes burrs, and prolongs tool life. Key parameters include:
| Parameter | Typical Range | Function |
|---|---|---|
| Edge hardness | HRC58–63 | Ensures cutting ability and resists rapid wear |
| Edge chamfer / bevel | 0.05–0.3 mm | Enhances edge strength, reduces chipping |
| Rake angle | 3°–15° | Affects cutting sharpness and chip evacuation |
| Relief angle | 4°–12° | Reduces friction and prevents surface scratching |
| Nose radius | R0.2–R1.6 mm | Increases strength and improves surface finish |
| Edge straightness | ≤0.01 mm/100 mm | Maintains dimensional accuracy and consistency |
During use, alloy steel cutting edges typically fail due to abrasive wear, adhesion wear, chipping, or plastic deformation. Causes include insufficient hardness, excessively sharp edges, uneven heat treatment, or overly aggressive cutting parameters. In practice, blade life can be extended through optimized alloy composition, standardized heat treatment, precise edge grinding, and proper selection of cutting speed and feed.
Alloy steel cutting edges are suited for medium- to low-speed operations, commonly machining mild steel, cast iron, non-ferrous metals, engineering plastics, and wood. Typical applications include sheet metal shearing, pipe cutting, woodworking tools, food processing blades, and hardware punching. With high toughness, good machinability, and cost-effectiveness, alloy steel blades remain a mainstream choice.
Overall, alloy steel blades achieve a balanced performance through alloying and heat treatment. The cutting edge, designed with precise geometry and treated edges, ensures reliable cutting performance. For scenarios requiring cost-efficiency, toughness, and versatility, alloy steel blades with optimized cutting-edge structures continue to provide indispensable value in industrial machining.
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Factory 1：Hanjia village , Baidu industrial zone , Fenghua Area ,Ningbo City,315145 Zhejiang Province ,China
Factory 2：No.2 Chongfeng Rd , Sihong Town,Suqian city 223900 ,Jiangsu Province ,China
Sales Office：Rm1803, Changjiang international Building ,Beilun Area ,Ningbo city 315806, Zhejiang ,Province
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