Locking Gas Springs

At Camloc, we understand the importance of reliable gas springs in various applications. Our range of locking gas springs work just like conventional struts, with a unique internal locking valve that allows you to stop the strut in any position. These versatile locking gas springs are perfect for a variety of applications, including adjusting the height and angle of seats on aircraft, buses, trains, military vehicles, and specialist vehicles.

Unlocking the Potential of Locking Gas Springs – Introducing Blocklift

When it comes to height adjustment that stays securely in place or easy and instant adjustments, look no further than our locking gas struts – Blocklift.

Our Blocklift range offers four unique products, each specially designed for a variety of applications and projects.

BL1: Rigid in Extension

Locks the piston in extension for full extension rigidity, while allowing a small amount of compression movement. The piston rod automatically returns to its original position when the compressive load is released. These locking gas struts can be mounted in any orientation, offering flexibility for various projects.

BL2: Rigid in Compression

This gas spring provides complete rigidity in compression but allows a slight movement in extension. When the extension load is released, the piston rod returns to its initial position automatically. While our engineers recommend mounting these locking gas springs rod down, they can be mounted in any position by advising us during the enquiry.

BL3: Spring Blocking (Elastic Locking)

Ideal for applications requiring additional comfort, even when the Blocklift is locked in position. Similar to office chair springs, these locking gas struts compress a few millimeters when a load is applied in extension or compression. Beyond that point, increased pressure holds it locked in place. The piston rod returns to its initial position once the load is released. Mount these locking gas springs rod down.

BL4: Rigid in Extension and Compression

The BL4 locking gas spring delivers complete rigidity in both extension and compression. It can be obtained with or without extension force, depending on whether control is needed for the application or if it is externally controlled. These locking gas struts are versatile and can be mounted in any orientation.

Blocklift Type Blocklift Decription Blocklift Size Stroke (Rod) Length Min / Max
(in 1mm increments)
Tube Length Min / Max
(in 1mm increments)
Force Min / Max
(in 5N increments)
Rod End Thread Type
BL1 Rigid in Extension 8-23 30 – 240 100 – 580 100 – 450 M8 x 1.0
10-23 30 – 300 110 – 580 150 – 650 M10 x 1.0
10-28 30 – 300 110 – 580 150 – 1000 M10 x 1.0
BL2 Rigid in Compression 8-23 30 – 200 115 – 580 100 – 450 M8 x 1.0
10-28 30 – 270 125 – 460 150 – 1000 M10 x 1.0
BL3 Spring Blocking (Elastic Locking) 8-23 30 – 300 90 – 580 100 – 600 M8 x 1.0
10-23 30 – 400 100 – 580 150 – 1000 M10 x 1.0
10-28 30 – 400 110 – 580 150 – 1000 M10 x 1.0
BL4 Rigid in Extension & Compression 10-28 25 – 135 115 – 525 0 – 400 M10 x 1.0

What are the key benefits of locking gas springs?

  • UK-manufactured product
  • Locks in any position along the length of stroke
  • Single-handed operation
  • Safe to use with easy positional control
  • Self-contained unit and maintenance-free
  • Available in carbon or 316L stainless steel

Unlocking the Mechanics of Locking Gas Struts

Have you ever wondered how locking gas springs are able to hold any position? It’s all thanks to the innovative design that incorporates a locking valve. These gas struts only allow movement when the release pin, located at the end of the rod, is depressed. This can be done using a cable-operated release mechanism or a directly attached paddle.

Locking gas springs find widespread use in various applications. One common example is the height and angle adjustment of seats on aircraft, buses, trains, specialist vehicles, and military vehicle seating. They also provide controllable adjustment on hospital beds, physiotherapy tables, wheelchairs, and can even be utilized as height risers for desks. The versatility of locking gas springs knows no bounds, with countless possibilities in a wide range of industry sectors. Design engineers can unleash their imagination when incorporating these reliable solutions into their projects.

Will it work for my requirements?

At Camloc, we offer a bespoke service where we treat every project individually, and our team of experienced designers and engineers will work with you to provide gas spring solutions that will exceed your expectations.  

We pride ourself on our service to customers, with design engineers on hand to work with you using the latest CAD/CAE techniques. Recognising that no two applications are the same, we provide engineered solutions to meet your exact requirements. 

For more information about our range of motion control solutions, visit our products page today. 

If you want to speak to a member of our team, call us on +44 (0)116 274 3600 or fill in the Contact Us form and we will get back to you. 




Seat back adjustments


Hospital beds patient handling equipment

Speciality Vehicle

Steering column adjustment

What sizes do you offer?

Gas springs are commonly referenced by their size. The sizes directly relate to the diameter of the rod and the tube, for example, an 8-23 in the Blocklift range will have a rod diameter of 8mm and a tube diameter of 23mm. The most common sizes for our locking gas struts are 10-28 and 8-23.

We also offer a wide range of bespoke sizes depending on your requirements.

What options are available?

  • BL1: Rigid in Extension
  • BL2: Rigid in Compression
  • BL3: Spring Blocking (Elastic)
  • BL4: Rigid in Extension and Compression
  • Tube lengths available in 1mm increments
  • Stroke length available in 5mm increments
  • Force settings in 5N increments
  • Valve to allow for downward force adjustment
  • Mild steel or 316 stainless steel construction
  • K-factor (spring rate) adjustment
  • Oil chamber / rod-up mounting options
  • Wide range of end fittings
  • Food safe oils
  • Non-magnetic / medically safe
What Our Customers Say

“Working with Camloc is easy and feels like working with other members of our team, they really understand how we work and what we want to achieve."

James Smith – Industrial Sales Manager – Clarendon Specialty Fasteners

How does Camloc operate?

Continuous investment in our staff and the latest hardware keeps us at the forefront of our industry, ensuring we continuously adopt the latest manufacturing processes from our facility, and we successfully problem-solve for our customers. We continue to enhance and evolve our production processes using lean manufacturing methods, something we have been doing since 2001.

We deliver high quality products that cover a wide range of industry sectors, across the UK, USA, Europe and around the world.

Get in touch via our Contact Form or call us on +44 (0)116 274 3600

To access more information on installing, maintaining and technical data about gas spring, damper and motion control solutions – head to our Help Centre.