Colewell's Pull Tension Gas Strut operates on a reverse principle compared to standard gas springs. While a standard strut pushes the rod out, a tension strut utilizes internal nitrogen pressure to pull the rod inward. This makes it the perfect solution for applications where a door, lid, or lever needs to be held in a closed or retracted position.
Also known as traction gas springs, these units provide a controlled pulling force to assist in lifting heavy ramps (by pulling from above), closing industrial safety gates, or retracting overhead garage doors. They offer smooth, damped retraction without the violent snap of a mechanical extension spring.
| Pull Force | 50N - 2000N. Calibrated traction force to pull loads ranging from 5kg to 200kg. |
| Action Type | Traction (Pull-In): The rod is normally retracted (inside). Force is required to pull it out. It self-retracts when released. |
| Material Build | Cylinder: Heavy-duty Steel (Powder Coated) or Stainless Steel 304/316. Rod: Hard Chrome Plated for low-friction gliding. |
| Operating Temp | -20℃ to +80℃. (Can be customized for extreme environments). |
Unlike coil springs that snap back dangerously, our tension gas springs feature hydraulic damping to control the speed of retraction, preventing slamming and injury.
Tension struts are often more compact than compression struts for the same stroke length, making them ideal for tight machinery spaces.
ISO 9001 manufacturing standards ensure consistent pulling force and seal integrity over thousands of cycles.
• Fittings: Specific "pull-type" end fittings designed to handle tension loads without detaching.
• Force: Adjustable valve options available for prototyping.
Lift Assist: Pulls the door up from the ceiling tracks, counterbalancing the door weight for easy manual operation.
Easy Lifting: Mounted horizontally, the strut pulls the heavy ramp up, making it feel weightless for the operator.
Auto-Closing: Ensures safety covers on CNC machines or presses automatically pull shut when released.
Pull-Down Assist: Assists in closing overhead attic ladders or roof hatches that are difficult to reach and pull down manually.
Provides constant traction force to keep lids or doors securely closed.
Hydraulic regulation ensures the retraction is smooth, not snapping back violently.
Designed for high-cycle applications with robust seals and materials.
Stroke, force, and damping speed can be tailored to your project.
Available in Stainless Steel for outdoor or marine use.
Standard eyelets or clevis forks make installation straightforward.
Colewell Machinery is one of the few manufacturers mastering the production of high-performance tension gas struts.
While others focus only on pushing, we understand the complexities of pulling. Our engineers design tension struts that offer superior seal life and consistent traction force, solving complex closing challenges for industrial and automotive clients.
A: A compression strut pushes out to lift things (like a car hood). A tension strut pulls in to close things or lift from above (like a garage door).
A: It should be installed so that the rod is pulled out when the door is open. The natural force of the spring will then pull the rod back in to close the door.
A: Yes, we can customize the hydraulic damping orifice during manufacturing to control how fast the strut retracts.
A: We offer standard models up to 2000N (approx. 200kg) and can engineer custom heavy-duty solutions up to 5000N for industrial use.
Sign in
CN
