Rod H8 70x82

Length, m

External diameter (mm): 82
Inner diameter (mm): 70
Wall thickness (mm): 6
Pipe class: H8
Pipe material: Steel 52 (E355)
Smoothness of the inner surface: Ra ≤ 0.2µm (Rt ≤ 3.0µm)
Internal surface hardness: from 190 to 245 HB (Brinell)

Accuracy class H8 - regulated by the international standard ISO 286-2, defines tolerances for internal diameters of pipes or holes in the range from 3 mm to 3150 mm. In this class, the internal diameter must remain within the nominal diameter plus zero (0) to plus fifty microns (50 microns), which confirms the high accuracy of manufacturing and dimensional control.

H8 pipes - which have undergone the honing (or driving) process - are characterized by a very smooth inner surface, which improves their strength, wear resistance and reduces friction during operation. These tubes are widely used in hydraulic systems, pneumatic systems, mechanical and automotive parts, as well as in the construction industry and other industries that require high precision and quality of the inner surface.

Honing is the process of processing metal pipes or holes using a special tool whose abrasive materials help to achieve high smoothness and precision of the internal surface. This process is used in various industries, including automotive, aviation, shipbuilding, mechanical engineering, and others, where high quality processing of the internal surfaces of parts is required.

Dimensions
The outer diameter	85
Caliber	70
Settings
Mode of production:	cold drawn
The roughness of the inner surface:	the inner surface, does not exceed the Ra max 0.4mkm.
Material:	steel St52; St52.3; E410; E355; St E460.
Length	specified by the customer. Standard admission poriztsi at 0 ... + 5 mm.