Products
Our company is SAIFU VIET NAM COMPANY LIMITED, located in Vietnam. It mainly engages in the production and sales of transmission parts and agricultural machinery accessories, including gearbox, chain&sprocket, pulley, gears, pto shaft, trailer&trailer parts, agricultural machine&parts.External Gear
What is an External Gear?
An external gear is a mechanical component with teeth cut on the outer surface of a cylinder or cone, designed to mesh with another gear to transmit torque and motion. These gears are fundamental in various machinery, including automotive transmissions, industrial equipment, and consumer appliances, due to their efficiency, durability, and versatility in power transmission systems.
Key Features of External Gears
- High torque transmission capacity
- Precision manufacturing for smooth operation
- Available in various materials like steel, brass, and plastic
- Customizable tooth profiles for specific applications
- Resistant to wear and corrosion with proper treatment
Technical Specifications
Our external gears are engineered to meet industry standards, with detailed parameters provided below for informed selection.
Material Options and Properties
| Material | Hardness (HRC) | Max Operating Temperature (°C) | Application |
|---|---|---|---|
| Carbon Steel | 58-62 | 400 | Heavy-duty machinery |
| Stainless Steel | 50-55 | 600 | Corrosive environments |
| Brass | 80-100 (HB) | 200 | Low-noise applications |
| Nylon | R80 (Rockwell) | 120 | Light-duty, consumer products |
Dimensional Parameters
| Gear Type | Module (mm) | Number of Teeth | Outer Diameter (mm) | Face Width (mm) |
|---|---|---|---|---|
| Spur Gear | 1.0 - 10.0 | 10 - 200 | 20 - 1000 | 5 - 100 |
| Helical Gear | 1.5 - 12.0 | 15 - 150 | 30 - 800 | 10 - 120 |
| Bevel Gear | 2.0 - 8.0 | 10 - 100 | 25 - 500 | 8 - 80 |
Performance Metrics
| Parameter | Value Range | Testing Standard |
|---|---|---|
| Efficiency | 95% - 99% | ISO 6336 |
| Noise Level | 50 - 80 dB | ANSI/AGMA 2000 |
| Load Capacity (N) | 500 - 20,000 | DIN 3990 |
| Service Life | 10,000 - 100,000 hours | ISO 281 |
Applications of External Gears
- Automotive transmissions and differentials
- Industrial robots and CNC machines
- Wind turbines and renewable energy systems
- Household appliances like washing machines
- Agricultural equipment and machinery
Frequently Asked Questions (FAQs)
What materials are best for high-load applications?
For high-load scenarios, carbon steel or alloy steel external gears are recommended due to their high hardness and strength, often heat-treated to enhance durability and wear resistance.
How do I calculate the gear ratio for an external gear system?
The gear ratio is determined by dividing the number of teeth on the driven gear by the number on the driving gear. For example, if a driving gear has 20 teeth and the driven gear has 40, the ratio is 2:1, meaning the driven gear rotates half as fast but with double the torque.
What maintenance is required for external gears?
Regular maintenance includes lubrication to reduce friction and wear, inspection for tooth damage or misalignment, and cleaning to prevent debris accumulation. The frequency depends on operating conditions, such as load and environment.
Can external gears be used in underwater applications?
Yes, with proper material selection like stainless steel or coated metals to resist corrosion, and sealed housing to prevent water ingress, external gears can function effectively in underwater or high-moisture environments.
What is the difference between external and internal gears?
External gears have teeth on the outer surface and mesh with other external gears or internal gears, whereas internal gears have teeth on the inner surface and typically mesh with external gears, offering compact design advantages in certain assemblies.
How does tooth profile affect gear performance?
The tooth profile, such as involute or cycloidal, influences factors like noise, efficiency, and load capacity. Involute profiles are common for their smooth operation and ease of manufacturing, providing consistent performance across various speeds.
What standards govern external gear manufacturing?
Key standards include ISO 6336 for load capacity calculation, AGMA 2000 for quality and testing, and DIN 3990 for dimensional accuracy, ensuring gears meet international performance and safety requirements.
Are custom external gears available?
Yes, we offer customization options for material, size, tooth profile, and tolerance based on specific application needs, with capabilities to produce prototypes and large-scale batches according to client specifications.
As a External Gear manufacturer and supplier in Vietnam, we have our own factory. If you are interested in purchasing product, get in touch!
