heavy duty Excavator Hydraulic Cylinder Boom/Arm/Bucket manufacturers

heavy duty Excavator Hydraulic Cylinder Boom/Arm/Bucket manufacturers

Processing and inspection:

1.Cylinder Tube
According to the work pressure,work temperature,work situation and other special requirements,different cylinder tube will be chooses.
1.1 Cylinder Tube:cold drawn precision seamless steel tube,hot rolled seamless steel tube,forged tube.
1.2 Tube Material: SAE1020(20#) , SAE1045 (45#) , 16Mn(Q345B), 27SiMn,etc.
1.3 Surface Roughness: R0. 16-0.32μm
1.4 Inside Chromatin: If necessary,inside tube will be chromed.

2.Piston Rod
2.1 Rod Material:35#,SAE1045(45#),35CrMo, 42CrMo4, etc.
2.1 Technical Treatment: Quenched and tempered.1.5-1 mm,or 1.03 mm per millimeter.

3.Seal Kits
According to customers’ requirements and work condition,we will choose suitable seal kits,including: Hallite, NOK, SKF,Parker,Merker, Trelleborg, China made,Taiwan made.We will supply you suitable seal kits to ensure hydraulic cylinders a long lifetime,easy maintenance and simple repairing.

4.Inspection and Testing
4.1 We have professional quality control department,every step from raw material to finished product is in the same factory,each procedure will be tested by professional inspector.
4.2 Before hydraulic cylinder is assemblies , every spare parts would be measured and cleaned .After hydraulic cylinder is assemblies , pressure test would be carried out one by one.We ensure the testing pressure is 30%-50% higher than rated pressure in almost one hour’s test.Each hydraulic cylinder must be tested without any leakage.