The company produced varieties specifications: bore diameter 30mm-300mm, wall thickness 2mm-40mm. Technical conditions: bore precision H5-H10. Bore roughness Ra ≤ 0.63um, straightness ≤ 0.3mm / m. Steel is 20 # -45 #, 16Mn, 27SiMn and some low-alloy steel. Standard GB8713-88. Quilting mill production of major equipment: 350 tons full hydraulic prestressing precision drawing machines and 150 tons each one, pulling machine maximum stroke 12 m, the maximum drawing force of 350 tons. And a vertical honing machine 2, horizontal honing machine 2. Main purpose: hydraulic, pneumatic cylinder; hydraulic lines; spinning, textile and printing machinery pipe; automobile shock absorber tube; sleeve pipe; piston rod and precision steel pipe. Also available according to customer requirements: Length of pipe, honing tube and special heat pipe. Company provides the following services: * Wholesale and retail, one from the sale. * Customers can pick and choose the desired length or other requirements. * Booking, purchasing all kinds of steel products or special specifications spot. * Swap library missing specifications, eliminating the need for you to run around the procurement of hard. * Arrange transportation, large amount of hair straighteners your designated location. Now my company has a lot of quilting grinding tube, hydraulic cylinder tubes, HM tube, cylinder tube, rod tube, bearing steel, high-precision cold drawn tube stock, will be price, wholesale and retail ways, to provide you with quick quality service, welcome new and old customers to negotiate the power proposed a cylinder tube several advantages to improve the surface roughness, the roughness Ra ≤ 0.08μm can basically reach around. 2, the amendment roundness, ovality may ≤ 0.01mm. 3, to improve the surface hardness, so that by eliminating deformation, hardness HV ≥ 4 ° 4, residual stress layer after processing, improve fatigue strength by 30%. 5, to improve with the quality, reduce wear and extend the life of parts, but parts of the processing cost was reduced. Cylinder tube commonly used material 10 # 0.07 ~ 0.13 0.17 ~ 0.37 0.35 ~ 0.65 ≤ 0.035 ≤ 0.035 20 # 0.17 ~ 0.23 0.17 ~ 0.37 0.35 ~ 0.65 ≤ 0.035 ≤ 0.035 35 # 0.32 ~ 0.39 0.17 ~ 0.37 0.35 ~ 0.65 ≤ 0.035 ≤ 0.035 45 # 0.42 ~ 0.50 0.17 ~ 0.37 0.50 ~ 0.80 ≤ 0.035 ≤ 0.035 40cr 0.37 ~ 0.44 0.17 ~ 0.37 0.50 ~ 0.80 ≤ 0.035 ≤ 0.035 0.08 ~ 1.10 25Mn 0.22 ~ 0.2 0.17 ~ 0.37 0.70 ~ 1.00 ≤ 0.035 ≤ 0.035 ≤ 0.25 37Mn5 0.30 ~ 0.39 0.15 ~ 0.30 1.20 ~ 1.50 ≤ 0.015 ≤ 0.020 thick-walled cylinder tube