Stop paying OEM markups for nitrogen gas springs. GUNRI delivers ISO 9001-certified gas springs that match KALLER, DADCO, and HYSON dimensions exactly — at 30-40% lower cost. Same pockets, same performance, better value.
Every spring is 100% pressure tested and PED 2014/68/EU certified. No redesign needed. Just install and run.
Same OEM Specs. 40% Less. Delivered Faster.
Premium imported fluororubber seals, CNC-ground piston rods with Ra0.02um surface finish, and 100% pressure testing before shipment. That is why GUNRI gas springs deliver 1,000,000+ cycles with under 1% annual pressure loss. Backed by ISO 9001:2015 and PED 2014/68/EU certification.
Switch from coil springs to GUNRI nitrogen gas springs and you will get 10x longer cycle life, consistent force across the entire stroke, and a smaller footprint in your die set. Our customers typically recover the switch cost within 6 months through reduced downtime and better part quality.
Gunri, headquartered in China, stands as a prominent leader specializing in the innovative design and production of Nitrogen Gas Springs. As a trailblazing force in the industry, we are committed to redefining precision engineering through advanced technology and superior craftsmanship.
With an unwavering dedication to excellence and customer satisfaction, Gunri takes pride in being a pioneering manufacturer of Nitrogen Gas Springs that are engineered to elevate your operations. Our springs are meticulously designed and manufactured to provide precise force control, seamless monitoring, and unmatched reliability.
Drop-In Replacements for KALLER, DADCO, HYSON & TOSS
The GX series offers a compact and tight-fit nitrogen gas spring solution for piston rod sealing. It boasts the shortest total length and the highest compression force. This series is designed to save mold space and provides a smaller outer diameter compared to the GTU series.
（corresponds to Keller’s X Series, HYSON’s T3 Series, and TOSS’s TSP Series.）
Built on the ISO11901 standard, the GTU series nitrogen gas springs feature an extended working stroke and a smaller boost ratio. With enhanced performance parameters, it ensures more extended operational strokes and increased efficiency.
（corresponds to Keller’s TU Series, DADCO’s L.300, and TOSS’s TSL Series.）
The GXG series represents an upgraded version of the GX series, featuring slightly longer overall lengths. It comes with improved guiding capabilities and bottom-mounting threads. The bottom inflation hole is designed with a G1/8 thread specification.
The GCU series is characterized by its ultra-compact design, delivering robust compression force with minimal volume. It is an ideal choice when mold space is restricted. This series provides exceptional performance in compact mold environments.
The MINI series consists of miniature nitrogen gas springs with a non-serviceable integral rolling structure. The internal pressure of these springs can be adjusted as needed, allowing for customized solutions. It’s important to note that the inflation pressure should not exceed standard specifications.
If you are still using coil springs, here is what you are leaving on the table.
| Factor | Coil Springs | Nitrogen Gas Springs (GUNRI) |
|---|---|---|
| Force consistency | Drops as spring compresses | Near-constant throughout stroke |
| Typical cycle life | 50,000–200,000 cycles | 1,000,000–2,000,000+ cycles |
| Force density | Lower force per unit size | Higher force in smaller package |
| Maintenance | Frequent replacement | Minimal (seal every 500k cycles) |
| Force adjustability | Requires physical swap | Adjustable via gas pressure |
| Initial cost | Lower | Higher |
| Total cost of ownership | Higher over tool life | Lower over tool life |
Proper maintenance extends gas spring life by 50–100%. Follow this schedule:
Need a detailed maintenance guide? Contact our team.
"We switched from KALLER to GUNRI across 12 progressive dies. Same pocket dimensions, no modifications, and we are saving 38% on spring costs. After 6 months of production, force consistency is identical."
— Senior Tooling Engineer, Automotive Tier 1 Supplier
A nitrogen gas spring is a self-contained force module that uses compressed nitrogen gas to deliver consistent force over a long stroke. Unlike coil springs, the force output stays near-constant regardless of compression depth, making it ideal for stamping dies, injection molds, and forming applications.
GUNRI nitrogen gas springs are rated for 1,000,000+ cycles at full stroke under normal operating conditions. With regular maintenance, many customers reach 2,000,000+ cycles before a rebuild is needed.
Yes. Every GUNRI spring is machined to the same dimensions as the OEM equivalent. Outer diameter, rod diameter, flange mount, and bottom tapped holes are identical. No die pocket modification needed.
GUNRI springs use premium imported fluororubber dual-lip seals with a leak rate under 1% per year — well within industry standards. Under normal production, you will not notice measurable force drop for the first 500,000 cycles.
Most customers save 30–40% compared to OEM brand pricing (DADCO, KALLER, HYSON, TOSS) for an equivalent or better specification.
GUNRI gas springs are manufactured under ISO 9001:2015 and comply with the European Pressure Equipment Directive (PED 2014/68/EU). All springs undergo 100% pressure testing before shipment.
We give value to the excellence and top class engineers, but in terms of accurate service.
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