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Excavator hydraulic cylinder

  • Origin: China
  • Supply Type: oem service
  • Processing Time: 45DAYS
  • Min Order: 5

Supplier Info.

  • Employees Total 51-100
  • Annual Revenue US$10 Million - US$50 Million
  • JIANGSU YINGNAISI company design and manufacture heavy duty hydraulic cylinders that covering the following fields:
  • l Ø hydraulic press cylinder
  • l Ø construction machinery cylinder
  • l Ø mining machinery cylinder
  • l Ø metallurgy machinery cylinder
  • l Ø water power project cylinder
  • l Ø marine hydraulic cylinder
  • l Ø servo hydraulic cylinder
  • 2. Design
  • Not only we could manufacture all kinds of hydraulic cylinders according to the drawing from our
  • customers,but also we could make a design according to customer's requirements.If you
  • require our engineer to make a design,pls advise us the following specification:
  • 1. Rated pressure
  • 2. Working pressure
  • 3. Test pressure
  • 4. Working condition and environment ,for example ,temperature ,working frequency
  • 5. Pulling force ,and return stroke force
  • 6. Pulling and return speed
  • 7. Assembly size
  • 8. Seal ring requirements .For example , brand ,seal material etc .
  • 9. Tube and piston rod raw material requirements
  • 10. Piston rod surface treatment requirements, for example chromating film thickness ,
  • Surface hardness etc .
  • 11. Painting and other spare parts requirements .
  • 3. Manufacturing capability and cylinder size range
  • 3.1 Cylinder bore diameter :max Ø1200mm
  • 3.2 Cylinder length :10Meter
  • 3.3 Max lifting capability :50 Tons
  • 4.Manufacturing and inspection
  • 4.1.Cylinder tube size and choice
  • 4.1.1 According to the cylinder pressure and inside diameter size ,different steel tube Would be choosed .
  • 1. ID ≤300mm , cold rolled precision seamless tube would be choosed
  • 2. 300mm≤ID ≤500mm , hot rolled seamless tube would be choosed
  • 3. 500mm≤ID ≤1000mm, forged tube would be choosed
  • 4.1.2 Cylinder tube steel grade : SAE1020 , SAE1045 ,27SiMn , S355JR ,S355J2G3
  • St52-3 ,SUS304 ,SUS316L etc .
  • 4.1.3 Cylinder tube inside boring and honing , roughness R0.2-R0.3,
  • 4.1.4 Cylinder tube inside chromating : if necessary ,tube inside chromating could be applied
  • .
  • 4.2 Piston rod is a very important part for hydraulic cylinder .
  • 4.2.1 Piston rod steel grade : SAE1045, 42CrMo4, SUS410 ,SUS420, SUS304, SUS316L
  • 4.3 Seal ring and O ring
  • According to the customers’ requirements and working condition , we would choose suitable
  • seal ring kit , . we would supply suitable seal solution for their customer so that hydraulic cylinder has more
  • lifetime , easy maintenance and simple repairing .
  • 4.4 Tube and flange welding
  • The welding on cylinder tube and flange would be Ultrasonic tested every time , the welding seam would be
  • cleaned before machining .we ensure that every welding seam has no any leak during lifetime
  • 4.5 Assembly and pressure test
  • Before hydraulic cylinder is assemblied , every spare parts would be measured and cleaned .After hydraulic
  • cylinder is assemblied , pressure test would be carried out one By one , eternal company ensure that testing
  • pressure is higher 30%-50% than working pressure , and pressure holding time 30~60 minutes is necessary . Every piece hydraulic cylinder must be tested completely without any leak .
  • 4.6 Painting and storage .
  • After hydraulic cylinder pass through pressure test , painting is necessary .
  • 4.hydraulic cylinder quality guarantee system
  • Program before Delivery
  • 1. Trial Operation Test
  • 2. Start-up Pressure Test
  • 3 Pressure-Tight Test
  • 4. Leak Test
  • 5. Full Stroke Test
  • 6. Buffer Test
  • 7. Testing the Effect of Limit
  • 8. Load Efficiency Test
  • 9. Reliability Test
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