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Welded Smooth Bore Cylinder Tubes Inside H9 Or H1

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These are cold drawn WELDED tubes that get,during the cold drawing the cold drawing process, a good roundness and a high ID precision, that satisfies tolerances H9 or H10 according to EN 20286.

Applications:

These tubes are construction elements, ready for the assembly of hydraulic and pneumatic cylinders.

Norms:

Cold Drawn Welded Tubes                               EN 10305-2

Dimensional Features Of The ID                   EN 20286

Dimensional Tolerances

 

OD: see dimensional tables of the bore cylinder tubes inside H9 or H10.

 

ID:

For steelgrade E235,tolerance H10 with roughness(Ra) below 1 micron(µm).

For steelgrade E335,tolerance H9 with roughness(Ra) below 0.8 micron(µm).

(see dimensional table for welded smooth bore cylinder tubes inside H9 or H10).

 

W.T.:                       ± 7.5% with a minimum of  ±0.1 mm

 

                                  Max.W.T.- Min W.T. 

ECCENTRICITY:   _____________________        *100 ≤ 7.5%

 

                                 Max.W.T.+ Min W.T.                               

 

 

STRAIGHTNESS:

for OD                   ≤ 260 mm

                                se ReH ≤ 500 Mpa 0.0015 L;

                                se ReH > 500 Mpa 0.002 L;

for OD                   >260 mm

                                se ReH ≤ 500 Mpa 0.0025 L;

                                se ReH > 500 Mpa 0.003 L;

 

L= total length of the tube, the max. values to be checked on the total tube length.

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