Anbao Hydraulic

DIN 2391 St 52 Roller Burnished Steel Tubes Roller burnishing is performed on the return stroke. The plastic deformation taking place provides a surface finish of Ra= 0.05 - 0.20 µm - better than broaching, grinding or even honing. Roller burnishing also means an improvement in surface hardness. Roller burnishing steel tubes made mainly for the hydraulic cylinder industry and other applications where fine-finishing of the internal diameter of a tube is required, Primarily for hydraulics in the contracting, mining and construction industries.   Roller Burnished Tube/Honed Tube Standard :DIN 2391(EN 10305-1) Steel grades : St 52 (E355) I.D. tolerance ： H8 Inside diameter :between 20-1500 mm Outside diameter : between30-1600mm Tolerance of Wall Thickness ±7% Surface finishing: roughness Ra < 0.40 µ (average 0.15÷0.35 µ) Chemical composition and property of DIN2391 ST52 Cold drawn seamless Roller burnished steel tubes STEEL GRADE  % Max C Mn Si P

Honing is the process of grinding workpiece at a low speed during the honing head or workpiece rotation and reciprocating movement by using an expanding mechanism to press a number of oilstone installed on the circumference of the honing head radially towards the hole wall of   stee pipe (as shown in the following figure). In order to reduce the influence of different coaxial rotation between the machine tool and the workpiece on the workpiece machining accuracy, the connection between the honing head and the machine tool spindle should be guided by the workpiece hole. In honing process, the overlapping contact points between the whetstone and the hole wall interfere with and trim each other, so that the hole surface presents an intersecting spiral cutting path. This non-repeated trajectory equalizes the opportunity of the interference point, and the roundness and cylindricity of the hole and the whetstone are constantly improved, and the surface roughness value of the hole wall is con

With high dimensional accuracy, fine surface quality and definable mechanical properties, EN 10305 Cold drawn steel tube is particularly suitable for use in hydraulic systems. EN 10305 series tubes are free choice of continuous sizes and consisted of 6 parts: — Part 1: Seamless cold drawn tubes — Part 2: Welded cold drawn tubes — Part 3: Welded cold sized tubes — Part 4: Seamless cold drawn tubes for hydraulic and pneumatic power systems — Part 5: Welded cold sized square and rectangular tubes — Part 6: Welded cold drawn tubes for hydraulic and pneumatic power system Anbao Hydraulic supply welded and seamless precision tubes with high quality and favorable price. We offers specially precision steel tubes with outside diameters from 30 to 800 mm and wall thicknesses up to 25 mm to suit a wide range of applications. We will be pleased to get your inquiry and reply you as soon as possible. Contact us for more information.