Product Description
DIN 11024 E - stainless steel 304 Spring cotters of a bolt
R-clips, also known as retaining pins are commonly used to secure the ends of round shafts such as axles and clevis pins.
#1 ATTN: Read This Before Buying
A. Due to the internet and computer display solutions. The actual products may differ from
the pictures. Please contact our salesmen for further assistance.
B. All the extension springs, compression springs, torsion springs, and wire forms can be made in customized demands.
C. We appreciate Drawing-Guide Production, Please send us a spring drawing as possible as you can when you inquire.
D. We appreciate your inquiries and you are welcome all the time!
For a better understanding of your demand, please learn the basics of r clip manufacturing.
#2 Working Drawing of an R clip
#3 Different Shapes of Helical Torsion Springs
There are generally two common types of torsion springs: single and double coil torsion springs. Double torsion springs are two single torsion springs connected. They work together to double the torque that a single spring would produce.
#4 Available Coating Method
Due to the government's environmental policy, all the coating materials are before RoHS standards. Please take RoHS standard coating as possible as you can. Below is a table for reference, you can simply learn the cost of each coating method.
| Coating Method |
Cost |
Does it Meet the RoHS requirement? |
Remark |
| Unplated |
None |
Yes |
|
| Anti-Rust Oil |
Lowest |
Yes |
|
| Black Oxide/Oxide |
Lower |
Yes |
|
| Normal Zinc coating |
normal |
No |
|
| Trivalent Zinc coating |
High |
Yes |
Normally 8~10μ thickness, 48 hours without white rust |
| Nickel Plated |
normal |
Yes |
|
| Electrophoresis |
Higher |
Yes |
|
| Painting |
Very High |
Yes |
require a longer delivery time |
| Stainless steel Washing |
normal |
Yes |
|
| Stainless Steel Electro-polish |
Highest |
Yes |
This coating cost more than the others |
FAQ
DOFO Spring provides a win-win service. Below we list answers to some of the questions our customers frequently asked. For anything unsure, please contact us, and we will respond within 12 hours.
Q: Which kind of materials are available? Do they meet RoHS certification?
A: DoFo Spring can manufacture different spring types of compression springs, extension springs, torsion springs, and wire forms with a large range of High-Grade Spring Steel - Carbon steel - Stainless steel - Music Wire, all comply with the RoHS standard. The wire diameter is available from 0.001 inches to 0.075 inches, which can meet the requirements of different applications.
Q: Do you support orders in small quantities or do you only accept large runs?
A: DoFo Spring manufactures large quantity springs, and small quantity springs based on your demand. We will work with you to choose the most effective solution.
Q: Does DOFO Spring offer DESIGN service OR initial ASSISTANCE ON SPRINGS?
A: Our engineers could give initial assistance on the design and advise to lower the production cost. Our engineer has years of experience in spring design. We could provide drawing format in CAD, 3D, and 2D design layout as well as prototype development.
Q: What is the typical lead time for custom springs?
A: The lead time varies in custom springs. For compression springs, extension springs, torsion springs, and wire forms in our mold range, we can deliver within 25 days. However, for some complex shapes of springs, the delivery time would be around 30~40 days.
Q: Do you charge custom spring samples?
A: We make the custom springs sample charge as a subscription of formal order. In other words, the sample charge could be refunded when we receive the order. However, if your sample requires an additional mold, we will charge it.
Q: If we order a large quantity of springs, will you house the springs, and wire forms, and ship them to us based on a required basis?
A: Our warehouse provides specific stock services for long-term business. You can make your shipment schedule on an annual, or monthly basis. We will ship on a specific schedule.
Q: What payment terms do we accept for spring orders?
A: We could accept payment terms based on T/T, L/C at sight, DP, and Westunion.
Company Profile
Our Advantages
Certifications
If any question, please contact us directly.
Audited Supplier 
){kind=link}
){kind=link}