Sintered Pinion
The sintered pinion is a small gear manufactured using powder metallurgy. It is produced by mixing metal powders according to a formula, pressing them into gear blanks, and then sintering and undergoing post-processing (such as shaping, oil impregnation, heat treatment, etc.). It is one of the most widely used types of powder metallurgy components and is commonly employed in various precision transmission applications.
- Product Introduction
Product Details
|
Commodity |
Factory customized high precision strong wear resistance sintered pinion |
| Modular range | 0.1-2.0mm |
| Number of teeth range | 10-100 teeth |
| Outer diameter tolerance | ±0.01mm - ±0.03mm |
| Tooth surface roughness | Ra0.8-Ra3.2μm |
| Density | 6.0-7.2g/cm³ ( iron based ) |
| Tensile strength | 300-800MPa |
Core Strengths
• High-precision forming: The mold pressing process can directly produce gear tooth shapes close to the final form, eliminating the need for extensive post-cutting machining. The tooth form accuracy can reach grades 7-9 according to GB/T 10095, meeting the requirements of most small-scale transmission applications .
• High material utilization: The powder metallurgy process virtually eliminates material waste, increasing material utilization from 30%-50% in traditional machining to over 95% .
• Controllable batch costs: Suitable for large-scale automated production, with single-gear costs significantly decreasing as output increases, particularly ideal for scenarios with high-volume demand such as automobiles and household appliances .
• Composite Performance Customization: By adjusting the powder composition and sintering process, gears with special properties such as self-lubrication, high wear resistance, and corrosion resistance can be manufactured .
Mainstream Material Types and Application Scenarios
Iron based sintered small gear
• Performance characteristics: By adjusting the carbon content and sintering process, a wide performance range from soft to high hardness can be achieved, with a density of 6.0-7.2g/cm ³, a hardness of 50-250HB, and a tensile strength of 100-800MPa .
• Application scenarios: automotive gearbox synchronizer gears, engine valve tappet gears, power tool transmission gears, balancing strength and cost advantages .
• Special treatment: The tooth surface hardness can be further improved to above 55HRC through carburizing and quenching, enhancing wear resistance .
Copper based sintered small gear
• Performance characteristics: Density of 6.0-8.0g/cm ³, hardness of 40-120HB, tensile strength of 80-300MPa, good self-lubricating and corrosion resistance .
• Application scenarios: home appliance reducer gears (such as washing machines, air conditioning fans), office equipment transmission gears (printers, copiers), toy gears, with excellent low-noise operation performance .
Stainless steel sintered small gear
• Performance characteristics: Density of 6.5-7.8g/cm ³, hardness of 80-200HB, tensile strength of 200-600MPa, excellent corrosion resistance, can work for a long time in humid/acidic/alkaline environments .
• Application scenarios: Food processing machinery gears, medical equipment transmission gears, outdoor garden tool gears, meeting hygiene or corrosion resistance requirements .
Oil containing sintered small gear
• Performance characteristics: The pores are filled with lubricating oil through vacuum oil immersion process, with a density of 5.5-7.0 g/cm ³, hardness of 40-180 HB, tensile strength of 80-500 MPa, and lifelong self-lubricating ability .
• Application scenarios: Gears in non lubricated/low lubrication environments, such as electric bicycle wheel hub motor gears, fitness equipment transmission gears, agricultural machinery adjustment gears, do not require regular maintenance .
Key Performance Indicators and Influencing Factors
• Density: It is a core indicator that affects the strength of sintered gears. The higher the density, the higher the tensile strength and hardness; It can be controlled by adjusting the pressing pressure (200-800MPa), sintering temperature (1100-1350 ℃), and powder particle size .
• Tooth profile accuracy: It is mainly determined by the precision of the mold. High precision molds (processing accuracy ± 0.002mm) can manufacture sintered gears with 7 levels of precision, meeting the requirements of precision transmission .
• Wear resistance: It can be improved by adding solid lubricants such as graphite and molybdenum disulfide, or by surface carburizing and nitriding treatment .
• Noise control: Reduce transmission noise by optimizing tooth profile design (such as trimming teeth, drum teeth), improving tooth surface smoothness (Ra ≤ 0.8 μ m) .
Hot Tags: sintered pinion, China sintered pinion manufacturers, suppliers, factory, powder metallurgy productivity, powder metallurgy toughness, powder metallurgy technical support, powder metallurgy importers, powder metallurgy traceability, powder metallurgy nickel powder
