HAHN Gasfedern G series gas spring, lid and hatch support, 10–5000 N, steel / stainless

The HAHN Gasfedern gas spring is a self-contained, maintenance-free element for smooth lifting, holding and lowering of lids, bonnets, hatches, guards and flaps without an electric drive. The cylinder is filled with compressed nitrogen; the force results from gas pressure acting on the rod cross-section, and as the rod retracts the gas is compressed and the force increases (progression). A small amount of oil damps the end positions and lubricates the seal. In the free state the rod is extended.

Versions: steel (nitrided rod, painted cylinder), stainless steel V2A / AISI 304 for wet environments and medical use, V4A / AISI 316 for food, chemical and marine applications. Damping on extension, retraction or both. Options: filling valve to reduce force on site, protective tube, wiper, low-temperature NT version down to −40 °C and high-temperature HT version up to +200 °C.

HAHN Gasfedern has been developing gas springs since 1960 and has been part of the Stabilus group since 2016. Springs are made to the application: stroke, force and end fittings are selected by flap mass, centre of gravity and opening angle.

Key features:

• Smooth lifting and holding of lids without an electric drive
• Force and stroke calculated for the specific flap
• Steel, V2A and V4A stainless steel
• Oil damping of end positions
• Valve allows force reduction on site
• Maintenance-free design

Specifications:

• Working medium: compressed nitrogen + oil for damping and lubrication
• Extension force: 5–10,000 N by series; typical ranges 10–200, 30–450, 50–800, 80–1250, 150–2500, 300–5000 N
• Series: G 04-12, G 06-15/19, G 08-19, G 10-23/28/40, G 14-28/40, G 20-40, G 22-40
• Rod diameter: 2–30 mm, typical 4 / 6 / 8 / 10 / 14 / 20 / 22 mm
• Cylinder diameter: 6–65 mm, typical 12 / 15 / 19 / 23 / 28 / 40 mm
• Stroke: from 10 mm; typical ranges 10–1600 mm by series
• Material: steel; V2A (AISI 304); V4A (AISI 316)
• Temperature: standard per seal; special NT versions down to −40 °C, HT up to +200 °C
• Damping: none / on extension / on retraction / both directions
• End fittings: eye, fork, ball joint, thread M3.5–M14×1.5 — by series
• Options: valve, protective tube, wiper, reinforced seal, friction element
• Compliance: RoHS, REACH; ISO 9001, ISO 14001, ISO 45001
• Maintenance: not required

Application: Machine and cabinet covers, special vehicle bonnets, yacht and boat hatches, furniture flaps, protective guards, agricultural machinery, medical trolleys.

Scope of supply: Gas spring with agreed end fittings. Brackets, protective tube, valve and wiper are separate items.

Before ordering: Before ordering, provide flap mass, stroke, opening angle, mounting points, environment, temperature and material. The cylinder contains pressurised nitrogen: do not open or heat it, do not paint or clamp the rod; mount with pivoting joints and without side load.