3.5 mm screws for sockets

3.5 mm Screws for Sockets

3.5 mm Screws for Sockets


In this article, we will explore the world of 3.5 mm screws for sockets and delve into their various applications
and working principles. From selecting the right screw jack to understanding the differences between screw jacks
and hydraulic jacks, we will cover it all. Join us as we uncover the secrets behind these versatile fasteners.

What is a screw jack used for?

The screw jack is a mechanical device primarily used for lifting heavy loads and applying force in a controlled
manner. Its applications range from industrial machinery, construction equipment, and automotive systems to
theatrical stage setups and even medical devices.

screw jack

Industrial Machinery

In industrial settings, screw jacks are essential for adjusting and positioning heavy equipment, such as conveyor
belts, assembly lines, and robotic arms. Their precise and reliable lifting capabilities make them ideal for
maintaining optimal operational conditions.

Construction Equipment

Within the construction industry, screw jacks play a vital role in supporting scaffolding, adjusting formwork,
and leveling structures. Their ability to provide stable and adjustable support ensures safe and efficient
construction processes.

Automotive Systems

Automotive applications of screw jacks include lifting vehicles for maintenance and repair work, adjusting car
seats and headrests, and regulating convertible roofs. Their mechanical advantage enables easy control and
precise movements.

Theatrical Stage Setups

In the entertainment industry, screw jacks are indispensable for raising and lowering stage platforms, moving
props, and creating dynamic stage effects. Their smooth and quiet operation ensures seamless performances.

Medical Devices

Screw jacks find their place in medical equipment, such as hospital beds, surgical tables, and patient lifts. The
ability to adjust height and position with precision contributes to patient comfort and facilitates medical

screw jack

What is the working principle of screw jack?

Screw jacks operate based on the principle of a rotating screw translating linear motion. They consist of a
threaded shaft (the screw) and a mating nut. When the screw is rotated, the nut moves along the threads, creating
linear displacement. This simple yet effective mechanism converts rotary motion into a controlled vertical or
horizontal movement.

Mechanical Advantage

One of the key advantages of a screw jack is its mechanical advantage. By increasing the pitch of the screw, the
jack can achieve higher lifting capacities with less applied force. This makes it possible to lift heavy loads
using relatively small input forces.

Self-Locking Capability

Screw jacks possess a self-locking characteristic, meaning they can maintain their position without the need for
continuous power input. This feature ensures stability and safety, preventing accidental or undesired movements
under load.

Precise Positioning

With the ability to accurately control the rotation of the screw, screw jacks offer precise positioning. This is
especially crucial in applications where exact height or distance adjustments are required.

Backlash Minimization

To enhance precision and eliminate unwanted movement, modern screw jacks employ various techniques to minimize
backlash. These include anti-backlash nuts, preloading mechanisms, and high-precision manufacturing processes.

Maintenance and Lubrication

Screw jacks require regular maintenance and lubrication to ensure smooth operation and prolong their lifespan.
Proper lubrication reduces friction, prevents wear and corrosion, and preserves the overall performance of the

screw jack

What is the difference between a screw jack and a hydraulic jack?

While both screw jacks and hydraulic jacks serve similar purposes, there are distinct differences between the two

Working Principle

Screw jacks utilize the mechanical advantage of a threaded screw, whereas hydraulic jacks rely on the
incompressible fluid property of hydraulic systems.

Force and Speed

Hydraulic jacks can generate higher lifting forces and achieve faster response times compared to screw jacks.
However, screw jacks offer finer control and greater precision in positioning.

Power Source

Screw jacks are typically manually operated or driven by electric motors, while hydraulic jacks require a power
source, such as an electric or engine-driven hydraulic pump.

Size and Compactness

Screw jacks are generally more compact and suitable for applications with limited space, whereas hydraulic jacks
may require additional space for hydraulic fluid reservoirs and pumps.

Cost and Maintenance

Screw jacks are generally more cost-effective and easier to maintain compared to hydraulic jacks, which involve
hydraulic fluid management and potential seal and pump maintenance.

Choosing and Customizing the Right Screw Jack

When selecting or customizing a screw jack, several parameters and practical considerations need to be taken into

Load Capacity

The load capacity of the screw jack should match or exceed the maximum weight it will be required to lift or
support. It is important to consider both the static and dynamic loads to ensure safe and reliable operation.

Lifting Height and Speed

The desired lifting height and speed play a significant role in determining the appropriate screw jack design. A
higher pitch or multiple screw arrangements can increase the speed of vertical displacement, but careful
consideration must be given to the trade-off in load capacity and mechanical advantage.

Environmental Conditions

The operating environment, such as temperature, humidity, and exposure to dust or chemicals, should be taken into
consideration when selecting suitable materials and coatings for the screw jack components.

Mounting and Integration

The mounting configuration and integration of the screw jack with existing systems or structures should be
evaluated to ensure compatibility and ease of installation. Custom mounting brackets and couplings may be

Control and Automation

Consideration should be given to the control mechanisms and automation requirements. Screw jacks can be manually
operated, motor-driven, or integrated into automated control systems, depending on the application.

screw jack

HZPT – Your Leading Manufacturer of Screw Jacks

As a prominent manufacturer of industrial electric motors, gearboxes, and drive systems, HZPT is dedicated to
technological innovation and delivering excellent quality products. Our range of screw jacks includes the

1. Micro Gear Motors

Our micro gear motors offer compact and efficient solutions for applications requiring precise positioning and
torque control. With various gear ratios and motor options, they are suitable for a wide range of industrial
automation needs.

2. Medium Gear Motors

Designed for medium-duty applications, our medium gear motors provide reliable performance and durability. They
excel in situations that demand higher torque outputs without compromising on efficiency.

3. Brake-Speed Adjustable Motors

Our brake-speed adjustable motors combine the functionality of an electromagnetic brake and a variable speed
drive. This integrated design offers enhanced safety, energy efficiency, and precise control for braking and
speed adjustments.

4. Torque Motors

Equipped with high torque density and exceptional controllability, our torque motors are ideal for applications
requiring accurate and continuous torque output. They are widely used in robotics, CNC machines, and other

5. NMRV Worm Gearboxes

Our NMRV worm gearboxes feature a compact and lightweight design with high efficiency and low noise levels. They
are commonly used in power transmission systems, conveyor belts, and other industrial machinery.

At HZPT, we pride ourselves on our product quality and customer service. With our extensive expertise in
manufacturing, we offer the following advantages:

  • 1. Customization: We provide tailored solutions to meet specific requirements, including custom designs,
    materials, and finishes.
  • 2. Reliability: Our products undergo rigorous testing and quality checks to ensure long-lasting performance
    and reliability in demanding industrial environments.
  • 3. Technical Support: Our team of experts is dedicated to providing technical assistance and guidance to
    ensure seamless integration and operation of our screw jacks.
  • 4. Competitive Pricing: We offer competitive prices without compromising on product quality, making our
    screw jacks a cost-effective choice.
  • 5. Broad Application Range: Our screw jacks find applications in a wide range of industries and sectors,
    making them a versatile and dependable solution for various automation needs.

Choose HZPT as your trusted partner for all your screw jack requirements. Contact us today to discuss your
specific needs and explore the possibilities of collaboration.


Find us

Ep Screw Jack Co., Ltd.

Mail: [email protected]

As one of leading manufacturers, suppliers and exporters of mechanical products in China, We offer reducers, sprockets, industrial and conveyor chain, belts, pulleys, gears, racks, gearboxes, motors, PTO Shafts, taper lock Bushing, vacuum Pumps, screw air compressors and many other products. Please contact us for details.