Hydraulic HouseCylinders & RodsNIMET

Cylinders

i.d. ø40mm–ø200mm

Extreme dimensional accuracy (ISO H8 tolerance)

Steel grade E355
Supply condition +SR (Stress Relieved) according to EN 10305-1 / EN 10305-2 standards
Inner diameter (ID) tolerance ISO H8

Technical specifications and standards

Steel grade: E355
Supply condition: +SR (Stress Relieved) according to EN 10305-1 / EN 10305-2 standards
Inner diameter (ID) tolerance: ISO H8
Outer diameter (OD) tolerance: strictly complies with EN 10305-1
Straightness deviation: max. 1.0 mm per 1000 mm
Total straightness deviation: max. 3.5 mm for tubes up to 6000 mm long
Ovality (ID): within H8 diameter tolerance
Dimensions and range
Outer diameter range: Ø 60 mm – 245 mm
Inner diameter range: Ø 50 mm – 200 mm; standard sizes are 50, 60, 63, 70, 80, 90, 100, 110, 120, 125, 140, 150, 160, 180, and 200 mm.
Wall thickness: available from 5.0 mm to 12.5 mm, depending on inner diameter.
Standard length: up to 6,600 mm; custom cutting is available on request.

01Precise inner diameter: compliance with the strict ISO H8 standard ensures perfectly uniform internal dimensions along the full length of the tube.
02Minimal leakage: uniform geometry ensures tight piston fit, preventing fluid or air leakage under high pressure.
03Stable operation: piston movement is even, smooth, and easy to control.
04Mirror-like and smooth inner surface
05Long service life of seals: smooth walls significantly reduce wear on rubber and polyurethane seals.
06Low friction: system energy losses are reduced and less starting force is required to actuate the cylinder.
07High mechanical resistance and durability
08Surface strengthening: during roller burnishing, the inner layer of the tube is mechanically compacted by cold deformation.
09Crack prevention: residual compressive stresses in the inner layer significantly slow the formation and spread of microcracks.
10Wear resistance: due to the modified structure, the inner wall becomes more scratch-resistant.
11Optimal material (E355+SR)
12High strength: E355 steel according to EN 10305-1/10305-2 provides at least 640 MPa tensile strength.
13Stress relieved (SR): relief of internal stresses ensures that the tube will not deform during later machining or welding.
14Cold resistance: the material retains high toughness and strength even at low temperatures, with at least 40 J impact toughness at -20°C.

Cylinders & Rods