Characteristic Values

Usage : Mobile and industrial hydraulics, as well as marine hydraulics, cylinder diameters from Ø32mm to Ø250 mm.
Cylindertube : St. 52-3 DIN 2391/2393, int. tolerance H8-H10, Ra max. 0.8 µm.
Pistonrod : Quality 20Mnv6 corresponding to SS2142, Hard chrome 25 μm +/- 5 μm, hardness min. 850 HV, Ra max. 0.2 µm, ext. tolerance ISO f7.
Alternative Quality:
AISI 329 corresponding to SS2324, Hard chrome 25 μm +/- 5 μm, hardness min. 850 HV, Ra max. 0.2 µm, ext. tolerance ISO f7. Special qualities on request.
Seals : (Standard) Piston: Nitrile w/ acetal feed rings. Piston rod: Polyurethane lip seal. Wiper: Nitrile rubber Sh.90 with steel edge.
Normal pressure : Max. 250 bar.
Test pressure : Max. 375 bar.
Piston speed : Max. piston speed 0.5 m/sec, if stroke length not used (rod reaches bottom). If speed exceeds 0.1 m/sec, damping is recommended.
Tubebreakprotection : Can be built-in by custom order.
Cussioning : Not available with damping.
Positioning : Available on request with different types of electronic positioning, model REGAL, MTS-Temposonic & BALLUFF (see special brochure).
Working temperat. : Operating temperature -30°C to +100°C.
Pressure medium : Mineral oil-based hydraulic oil.
Painting : Comes standard with black primer. Available pre-painted at an extra cost.

Fjero develops and manufactures customized and standardized hydraulic cylinders. Our hydraulic cylinders perform many different functions every day - often in demanding environments.

Our customers, who work in many different industries, place great demands on functionality, quality and durability.


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