welded hydraulic cylinder

welded hydraulic cylinder

1. Cylinder Tube 
(1)Material: Standard using ASTM 1020(steel 20), ASTM 1035(steel 35), ASTM 1040(steel 40) with Ra0.4 after honing and rolling.
(2)Tube choosing: standard is cold drawn seamless steel tube, if need hot rolling seamless steel tube, please inform us before quotation. 
(3)Advice: Low pressure can use steel 20, high pressure can use steel 45. If customers have other special material request, can talk with us before quotation.

2. Piston Rod
(1) Material: Standard using ASTM 1035(steel 35) and ASTM 1045(steel 45).
(2) Piston Rod choosing: Solid piston rod and hollow piston rod (one of hollow piston rod end needs an air vent for welding and heating)
(3). Process: Quenching and tempering to reach hardness 229-285HB after roughing machining, if necessary, we also can reach hardness 45-55HRC after high frequency quenching. Standard chrome plated thickness is 25μm(if need more thickness, please inform us before quotation).

3. Piston
(1) Material: Standard material is wear-resisting cast iron, gray iron(HT300, HT350), steel and aluminum alloy, forging group II.
(2) The concentricity tolerance between piston and piston rod is 0.03mm.

4. Cylinder Cover
(1) Material: Cast iron for low pressure, gray iron HT300 for middle-low pressure. ASTM 1035(steel 35), ASTM 1045(steel 45) for middle-high pressure.
(2) Cylinder Cover choosing: It is better to use cast iron when cylinder cover also same function as guide sleeve, and melt brass, bronze or other wear-resisting material on the guide surface. If using the construct of pressing guide sleeve into cylinder cover, then the guide sleeve material should use wear-resisting cast iron, brass or bronze.

5. Seals
(1)Seals choosing: Good seal performance, low friction coefficient and small installation space of O-ring type Seals for low pressure, standard use our domestic brand. Middle-high pressure seals, we will use Y type, U type or V combined seals.

(2) Material:

High Quality Weld Series Double Acting Agricultural Hydraulic Cylinder Hydraulic

Double Acting Hydraulic Cylinders can be divided into different kinds.

1. competive price with high quality

2. fast delivery time

3. ISO manufacturer can ensured the qualtiy

4. All material will inspect bofore using, avoid bad material.

5. Before shipping, will test again and again to ensure all products are OK

6. 1 year warranty.