The AJX-400 is a high-performance metallurgical microscope designed for surface quality inspection of raw materials and finished products in industrial applications. This microscope offers excellent optical performance, making it ideal for both teaching and research purposes.
Key features include:
- **Model No.:** AJX-400
- **Shape:** Cylindrical Shaped Lens
- **Usage:** Teaching, Research
- **Principle:** Optics
- **Optical Principle:** Metallographic Microscope
- **Eyepieces:** WF 10×/18 mm
- **Objective Lenses:** 5×, 10×, 50×
- **Trademark:** AMZ
- **Transport Package:** Styrofoam and inner box
- **Origin:** China
- **HS Code:** 9011100000
The AJX-400 comes with a strong, continuously dimmable 30W halogen reflected illumination unit (Philips), ensuring clear and high-contrast images. It also features an integrated 5-slot filter wheel for blue, green, yellow, gray, and blank filters, allowing quick changes for different contrast views. A large mechanical stage is included as standard, offering precise control through coarse and fine focusing knobs on both sides.
Here are the detailed specifications:
| Specification | AJX-400 |
|-------------|---------|
| **Eyepieces** | WF 10×/∅ 18 mm (✓) |
| | WF 10×/∅ 18 mm (reticule 0.1 mm) (non-adjustable) (✓) |
| | WF 5×/∅ 20 mm |
| | WF 12.5×/∅ 14 mm |
| | WF 16×/∅ 13 mm |
| **Long Working Distance Infinity Plan Objective (no cover glass)** | 5×/0.13 W.D. 24.23 mm (✓) |
| | 10×/0.25 W.D. 18.48 mm (✓) |
| | 20×/0.40 W.D. 8.35 mm |
| | 40×/0.65 W.D. 3.90 mm |
| | 50×/0.7 W.D. 1.95 mm (✓) |
| | 80×/0.8 W.D. 0.85 mm |
| | 100×/0.9 W.D. 1.0 mm |
| **Binocular Tube** | Siedentopf 30° inclined/360° rotatable; interpupillary distance 50–75 mm; one-sided diopter adjustment (✓) |
| **Trinocular Tube** | Siedentopf 30° inclined/360° rotatable; interpupillary distance 50–75 mm; light distribution 80:20; one-sided diopter adjustment |
| **Nosepiece** | Quadplex (✓) |
| **Mechanical Stage** | Size: 200×140 mm; travel: 76×52 mm; coaxial coarse and fine focus (✓) |
| **Reflection Illumination** | 6V/30W Halogen bulb (✓) |
| **Reflected Illumination Unit** | 5-filter unit (blue, green, yellow, gray, empty) (✓); Polarizing unit (includes analyser and polariser slide) (✓) |
| **C-Mount** | 1× |
| | 0.5× (focus adjustable) |
This microscope is perfect for users who require precision, flexibility, and durability in their metallographic analysis. The AJX-400 combines advanced optics with user-friendly design, making it a reliable choice for professionals in various fields.
Gasoline Piston Ring
The piston rings in an internal combustion engine play a crucial role in maintaining a proper seal between the piston and the cylinder wall. These rings are typically made of cast iron or steel and are designed to fit tightly against the cylinder walls.
Firstly, the top ring, also known as the compression ring, is responsible for sealing the combustion chamber. It prevents the escape of gases from the combustion process and ensures maximum pressure is exerted on the piston. This ring is subjected to high temperatures and pressures, so it must be able to withstand extreme conditions.
Secondly, the second ring, or the oil control ring, is responsible for regulating the amount of oil that enters the combustion chamber. It prevents excessive oil consumption and helps maintain the proper lubrication of the cylinder wall. This ring is designed to scrape off excess oil from the cylinder wall and return it to the oil pan.
Thirdly, the oil scraper ring, also known as the third ring, is responsible for removing excess oil from the cylinder wall. It prevents oil from entering the combustion chamber and ensures that the piston rings remain properly lubricated. This ring is designed to scrape off any oil that may have passed the second ring.
Lastly, these piston rings are designed to maintain a proper balance between sealing the combustion chamber and allowing for the necessary lubrication. They must be able to expand and contract with the changing temperatures and pressures inside the engine. Proper installation and maintenance of these rings are essential for the efficient operation of the engine and to prevent any loss of power or excessive oil consumption.
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