Our standard stock includes cold drawn tubes, both SEAMLESS and WELDED, with machined ID according to tolerance H8 EN 20286 and roughness (Ra) below 0.4 micron (µm).
General Features:
Chemical
and mechanical features are the same of the raw tube (see steels-table
for cold drawn tubes suitable for honing), which is machined on ID. The
dimensional tolerances are the same of the raw tube, except for the ID,
which is according to H8.
Norms:
- Cold Draw Seamless Tubes EN 10305-1
- Cold Draw Welded Tubes EN 10305-2
- Dimensional Features Of The ID EN 20286
Tubes suitable for shafts Applications:
Itis
used for cylinders on self-propelled cranes, hydraulic systems for
lifts, tipping pistons and telescopic cylinders for automotive and
hydraulic platforms. They can replace solid piston rods for pneumatic
cylinders in order to reduce mass forces in high speed pistons.
Norms: EN 10305-1
Tolerances & Sizes
ID:
standard stock material is according to EN 10305-1. In case of tubes
suitable for telescopic cylinders, that can be supplied on request, the
tolerance allowing the machining also on the ID has to be agreed at the
time of the order.
W.T.: ± 10% with a minimum of ±0.1 mm
Max.W.T.- Min W.T.
Eccentricity: _____________________ *100
Max.W.T.+ Min W.T.
Straightness
for OD ≤ 260 mm
if ReH ≤ 500 Mpa 0.0015 L
if ReH > 500 Mpa 0.002 L
for OD >260 mm
if ReH ≤ 500 Mpa 0.0025 L
if ReH > 500 Mpa 0.003 L
