A screw jack is a mechanical device used to lift heavy loads or apply great forces with precision. It operates on the principle of converting rotational motion into linear motion through a threaded screw mechanism. This simple yet robust design makes it ideal for various industrial, automotive, and construction applications where reliability and safety are paramount.
Our screw jacks are engineered to meet rigorous standards, ensuring optimal performance. Below is a comprehensive table of specifications for our standard models.
| Model | Load Capacity (tons) | Lift Height (mm) | Thread Pitch (mm) | Efficiency (%) | Weight (kg) |
|---|---|---|---|---|---|
| SJ-05 | 0.5 | 100 | 2 | 30 | 1.2 |
| SJ-10 | 1.0 | 150 | 3 | 35 | 2.5 |
| SJ-50 | 5.0 | 200 | 5 | 40 | 8.0 |
| SJ-100 | 10.0 | 250 | 6 | 45 | 15.0 |
| SJ-200 | 20.0 | 300 | 8 | 50 | 25.0 |
Note: Custom configurations are available for specific requirements, such as different materials, coatings, or integration with automation systems.
Screw jacks are versatile and used across multiple industries. Common applications include:
Compared to hydraulic or pneumatic jacks, screw jacks offer several benefits:
What is the maximum load a screw jack can handle?
Our standard screw jacks handle up to 100 tons, but custom designs can exceed this for specialized applications. Always refer to the product specifications and ensure the load does not exceed the rated capacity to avoid failure.
How do I maintain a screw jack?
Regular maintenance involves cleaning the screw thread to remove debris, lubricating with appropriate grease (e.g., lithium-based for high load), and inspecting for wear or corrosion. For motorized versions, check electrical connections and motors periodically.
Can screw jacks be used in outdoor environments?
Yes, if they are constructed from corrosion-resistant materials like stainless steel or coated with protective finishes. However, avoid prolonged exposure to moisture without proper maintenance to prevent rust.
What is the difference between machine screw jacks and ball screw jacks?
Machine screw jacks use a trapezoidal thread and are self-locking, suitable for static loads. Ball screw jacks use recirculating ball bearings for higher efficiency and faster operation but may require a brake for holding positions. Choose based on application needs: precision and speed vs. safety and holding force.
How do I select the right screw jack for my application?
Consider factors like load capacity, lift height, speed requirements, environment (e.g., temperature, corrosion risk), and operation type (manual or motorized). Consult our product tables and reach out for engineering support if needed.
Are screw jacks safe for lifting humans or sensitive equipment?
Screw jacks are generally safe due to their self-locking design, but always use additional safety measures like overload protection or redundant systems when lifting humans or critical loads. Ensure compliance with local safety standards and regulations.
Can I automate a screw jack?
Absolutely. Many screw jacks can be integrated with electric motors, gearboxes, or control systems for automated operation. This allows for precise positioning and remote control, ideal for industrial automation.
What is the typical lifespan of a screw jack?
With proper maintenance, a screw jack can last for decades. Lifespan depends on usage frequency, load conditions, and environment. Regular inspections help identify wear early, extending service life.
Do screw jacks require a lot of force to operate manually?
The force required depends on the load and thread pitch. Higher thread pitches reduce effort but may sacrifice speed. For heavy loads, consider motorized options to minimize manual effort.
Are there any limitations to using screw jacks?
Screw jacks are slower than hydraulic systems and may not be ideal for high-speed applications. They also generate heat under continuous operation, so ensure adequate cooling or intermittent use for heavy-duty tasks.
