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Single-acting hydraulic cylinders
Our single-acting hydraulic cylinders are the ideal choice when force transmission in only one direction is required and the piston return is achieved by gravity or external forces. Learn more...
A selection of single-acting hydraulic cylinders
1 to 9 (from a total of 9)
They stand out for their robust design, low maintenance requirements, and long service life. Thanks to their compact dimensions and cost-efficient construction, they are perfectly suited for applications in agriculture, construction, mechanical engineering, and transportation technology. In the Hydromot shop you will find a wide range of cylinders with piston diameters from 25 mm to 70 mm, stroke lengths from 100 mm to 700 mm, and a pushing force of up to 7.6 tons.
Single-acting hydraulic cylinders – Frequently Asked Questions
What is a single-acting hydraulic cylinder and how does it work?
A single-acting hydraulic cylinder exerts force in only one direction – usually when the piston extends. Hydraulic oil is directed into the cylinder through a single port and pressurizes the piston. The return stroke is achieved by external forces such as gravity, a return spring, or mechanical load.
What are the main components of a single-acting hydraulic cylinder and what materials are they typically made of?
The main components are:
- Cylinder barrel: usually made of robust steel or aluminum
- Piston and piston rod: transmit the hydraulic force
- Seals: prevent leakage and protect against contamination
- Return spring (optional): assists the retraction
In which fields are single-acting hydraulic cylinders mainly used and why?
They are used where force is required in only one direction. Typical applications are:
- Agriculture (tipping mechanisms, trailers)
- Construction industry (lifting platforms, jacks)
- Mechanical engineering (simple presses)
- Transport (loading ramps)
Their popularity lies in their simple design, cost efficiency, and reliability.
What advantages do single-acting hydraulic cylinders offer compared to more complex systems?
- Simple, robust construction with fewer components
- Low-cost manufacturing and repair
- Compact design with only one port
- Durable due to fewer wear points
- Energy-efficient for one-way motion
How is the required size of a single-acting hydraulic cylinder calculated?
Calculation with the formula:
F = p × A, where F = force, p = system pressure, A = piston area.
Piston area: A = (π × d²) / 4.
For the piston diameter: d = √(4F / (πp)).
Additionally: consider friction losses, safety factors, and service life.
What criteria are crucial for selecting the right single-acting hydraulic cylinder?
- Required force and stroke length
- One-way motion only
- Retraction by spring, gravity, or external load
- Environmental conditions (temperature, contamination)
- Space constraints and installation dimensions
- Costs and maintenance requirements
What maintenance intervals and inspections are recommended for single-acting hydraulic cylinders?
- Visual and functional inspection: regularly, at least weekly
- Fasteners: check after 4–5 operating days
- Hydraulic oil: replace at the latest after 200 operating hours
- Filter: clean every 200 hours
- Annual functional check including seals
For heavy duty use, shorter intervals and planned seal replacement are required.
What role do seals and cleanliness play in the service life of a hydraulic cylinder?
Seals prevent leakage and protect against contamination. They are crucial for proper function and service life. High-quality seals and clean oil minimize wear. Contamination or defective seals quickly lead to damage and significantly shorten service life.