Cylinder tube/barrel

According to the cylinder pressure and inside diameter size, different steel tube would be selected.
ID ≤300mm, choose cold rolled precision seamless tube
300mm≤ID ≤500mm, choose hot rolled seamless tube
500mm≤ID ≤1000mm, choose forged tube
Steel grade : ST52 ,SAE1020, SAE1045, 27SiMn , CK45,SAE4140,SAE1518, SAE4145 ,St52-3, SUS304, SUS316L etc.

Inside boring and honing , roughness R0.2-R0.4
Inside chromed : if necessary ,tube inside chrome plating could be applied 

Piston rod

1. steel grade : SAE1045, SAE 4140,42CrMo4, SAE1518, SAE4145, SUS410 ,SUS420, SUS304, SUS316L or others

2. Hydraulic rod options: Chrome plated, nickel plated, induction hardened, stainless steel rod.

3. Eternal company ensure that every piece piston rod would be surface hardened before plating, surface hardness is HRC55~60 , 

4. Chrome layer: min 20/25/30/50 Micron or customized 

5. Diameter tolerance: ISO f7/f8/f9/h8/h9 or as request

6. Surface treatment: chrome plated, nickel-chromium plated, Q+T, Induction hardened

Seal ring and O ring

According to the customers’ requirements and working condition, eternal company would choose suitable
seal ring kit, seal ring brand include: Parker, Merkel, NOK, Guangzhou Rubber institute, Taiwan brand etc. Eternal company would supply suitable seal solution for their customer so that hydraulic cylinder has more lifetime, easy maintenance and simple repairing.

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. Eternal company ensure that every welding seam has no any leak during lifetime.

Stroke :50mm—16000mm

Design Pressure: Max 700 bar (10150 PSI)

Bearings: LONGXI (China) or SKF

Certificate: DNV, ABS, Lloyds, BV, GL, KR, NK, RINA, RS and CCS

Tolerance EXT: DIN2391, EN10305, GB/T 1619

Application: offshore oil & gas engineering, photovoltaic & wind power. construction machinery (excavator loader Crane/ snowplow/sanitation vehicle), agricultural machinery, hydraulic engineering, heavy machinery

Packing: Wooden case

We are committed to providing our customers with the highest quality custom hydraulic cylinder solutions. Our quality products provide you with the reliability and customization needed for optimal hydraulic cylinder performance.

Quality Custom Hydraulic Cylinders
Exacting specifications are welcomed. Your requirements come first, and we manufacture purpose-built custom hydraulic cylinders to fit those needs. The cylinder you receive is designed to perform in the intended application.

Purpose-Built Hydraulic Solutions
Every detail counts. Our entire company is purpose-built and engineered to move your business. This puts us in control of design, manufacturing, response time, integrity, and quality.

ISO 9001:2015 Certified
Earning ISO 9001:2015 certification is a badge of honor. Quality has become reinforced in every facet of our company. Defined structures and processes allow us to achieve higher operating efficiency while continuing to deliver industry-leading products.

• 1.Extensive production experience: more than 20 years manufacturing experience for honed tube and chrome plated rod, in Australia, Thailand, Brazil, India, Iran, Indonesia, South Africa and other countries have long-term buyers.
• 2.Advanced production equipment: cold drawing machine, honing machine, skiving & roller burnishing machine, straightening machine, polishing machine, heat treatment furnace, grinding machine, etc. We have professional technicians do regular scheduled maintenance on these machines to guarantee them work well.
• 3.High quality raw material: our raw material mainly from some famous steel mills, such as TPCO, BAO STEEL, SHA STEEL, which are best and largest raw material manufacturer in China.
• 4.High precision: Honed Tube, inside surface roughness 02-0.4 um, straightness max 0.5/1000, strict tolerance DIN2391 H8. Skived & Roller Burnished Tube, inside surface roughness under 0.2 um, straightness max 0.2/1000, strict tolerance DIN2391 H8. Chrome Plated Rod, chrome layer 10 micron to 100 micron, strict tolerance ISO f7.
• 5.Strict quality control: we have professional in-house QC to inspect all products. We will do Chemical Composition Test, Mechanical Property Test, Dimension Inspect, Roughness Test, Chrome Layer Test and other tests in need before delivery.
• 6.Safe packing: an-rust oil on tubes and rods before delivery. Plastic caps on both ends to protect tube inside surface. Then be packed with seaworthy package or in wooden case.