Frequently Asked Questions
Thanks for stopping by! we’ve put together some frequently asked questions to help you know more about custom hydraulic cylinders, components, honed tubing, chrome plated rods, and so on. If you don’t find what you are looking for below, just feel free to give us a shout or drop us a line. Click here to email us, or if you want to give us a call just dial +86 21 6266 6697.
About Custom Hydraulic Cylinders
Yes, JW mainly manufactures custom hydraulic cylinders for OEM purpose. Each cylinder to be produced as per your drawing or requirements. So far we have been working with some world famous companies on OEM cylinders or components, like EATON, DANIELI, etc.
JW not only manufactures hydraulic cylinders but also provides free design ideas and solutions.
The warranty is generally 2 years. For some special hydraulic cylinders, the warranty is 5 years.
If there is a problem of the hydraulic cylinders in application, firsly, please provide some photos or videos to let us know which part to let us know which part is the problem, and then check the drawings to see if there is a problem with the design. If there is no problem in the design, then check the production records to confirm whether there is a problem in the production process, and feedback the result to you, email or phone to guide the repair, or send a technician on-site to repair. If the above methods don’t work, then return the product to China, and we are responsible for re-producing a new hydraulic cylinder and ship it to you. We offord all costs until you are satisfied.
Yes, all hydraulic cylinders will be tested before shipping to make sure all is qualified. Substandard cylinders are not allowed.
Pneumatic and hydraulic rotary actuators.
The maximum torque is 250,000 Nm.
Quality guarantee for 5 years. Seals for 2 years.
About Machined Component Parts (Barrel, Piston Rod, Cylinder Head, Piston, etc.)
Cylinder barrel bore diameter from 25mm to 1200mm.
Diameter from 10mm to 560mm, the maximum length is 16m.
Generally chrome plating thickness on the rod is minimum 0.03mm. Special requiremets to be specified upon request.
Different treatment processes to increase the hardness of materials are as below:
- Quenching and tempering.
- Induction hardened.
- Carburizing, etc.
About Cold Drawn Tube, Honed Tube and Chrome Plated Rod
The longest skiving tube and honed tube we can process are respectively 16m and 20m.
Unless otherwise specified, the salt spray test generally defaults to 24 hours. If you have special requirements, please specify in the order.
For chrome plated rod, the tolerance is generally f7 by default, surface roughtness Ra≤0.2, straightness≤0.5/1000mm. If you have special requirements, please specify in the order.
For honed tubing, the ID tolerance is generally H8 by default. Surface roughtness Ra≤0.2, straightness≤0.5/1000mm. If you have special requirements, please specify in the order.
As long as the mass production doesn’t start, you can change the size or requirement accordingly.
Normally it takes 30 days for production. Depends on different products and quantities. The production time will be indicated in offer.
We accept T/T, L/C.
If shipping by air of light goods, normally 4 -5 days you can get it. Heavy goods are always to be shipped by sea, it generally takes around 20 to 30 days to arrive the destination port.
Common terms are EXW, FOB, CFR, CIF, DDU, DDP.