Made to drawing or sample
Compression springs
Open-coiled springs that push back when you compress them. Ends can be open, closed, or closed and ground so the spring stands flat.
01 · Specification
Quick spec
| Wire diameter | Ø 0.40–2.50 mm |
|---|---|
| Outer diameter and length | Outer diameter and length as per your drawing |
| Materials |
|
| Ends | Open, closed, or closed and ground — to your drawing |
| Finishes | Plating and other finishing through partnersTell us the finish on the drawing. We do not plate in-house. |
| Minimum order | 5,000–10,000 pcsSmaller runs are possible with development or setup charges. |
| Quotation | Within 24 hours |
| Delivery | Ex-works Talawade (transport not included) |
02 · Engineering
What it is and how it works
A compression spring is an open-coiled helix that pushes back when you shorten it. It is the most common spring type, and the one whose drawing is easiest to get wrong: people forget solid height, end type, or the hole the spring has to live in.
Three numbers decide most of the fit: wire diameter, outer diameter and free length. The rate follows from those plus the number of active coils and the material. If you also give a load at a working length, we can see whether the spring will bind before it does the job.
Keep the spring index (mean diameter ÷ wire) between about 4 and 12. Below 4 the wire is hard to coil; above 12 the coil wanders. A free length of four times the mean diameter or more will buckle unless the spring is guided on a rod or in a bore.
We grind ends when the drawing asks for it. Grinding is often skipped on the finest wire in our range.
03 · Variants
Types and ends
Closed and ground. Stands flat. The usual precision end.
Closed (squared). Last coil sits against the next. Not ground.
Open. Plain end. Cheap, and it leans.
Open and ground. Ground for a flatter seat without closing the end.
Cylindrical is the default. If the coils have to nest, that is a conical spring.
04 · Materials
What we coil it from
Only the grades we actually buy. Tell us the environment and we will pick from this list.
| Material | Typical standard | When to choose it |
|---|---|---|
| Spring steel (hard-drawn grades) | Typical of IS 4454-1 / EN 10270-1 cold-drawn carbon wire | Everyday torsion, extension, compression and wire forms where the part stays dry and the load is not highly cyclic. |
| Music wire | Typical of ASTM A228 / IS 4454-1 grade DH | On request, for small precision springs that need a higher tensile strength than hard-drawn wire. |
| Stainless steel 302 / 304 | Typical of ASTM A313 / IS 4454-4 | Damp, outdoor or electrical work where rust on carbon steel would be a problem. |
| Stainless steel 316 | Typical of ASTM A313 Type 316 | Chlorides or chemical splash. Tell us if the spring will see salt or cleaning chemicals. |
| Oil-tempered wire | Typical of IS 4454-2 / EN 10270-2 | On request, toward the upper end of our 0.40–2.50 mm range, for general industrial use. |
05 · Design
What to put on your drawing
- 01Wire diameter
- 02Outer diameter, or the hole it works in / the rod it works over
- 03Free length
- 04Total coils and active coils, if you know them
- 05End type (open, closed, closed and ground)
- 06Load at one or two working lengths
- 07Solid height, if it matters in the assembly
- 08Material and any finish
- 09Quantity
Say whether the spring works in a hole or over a rod, and give that diameter. An OD that looked fine on the desk can jam in a 0.2 mm-tight bore once the coil expands under load.
Closed-and-ground ends are the right default when the spring must stand square. If the wire is near 0.40 mm, ask us before you dimension a grind.
06 · Use
Where this spring is used
Switchgear and MCB contact stacks, small valves and buttons, battery contacts, furniture seats, instrumentation, pens and other light mechanisms. Automotive work in this wire range is usually a detent, a return or a seat spring — not a suspension coil.
We do not make die springs, heavy valve springs or anything above 2.50 mm wire.
07 · Process
How we make it
We coil the body, close the ends if specified, grind the ends when the drawing asks for it, then stress-relieve the batch. Finishing goes through partners. Dispatch is ex-works Talawade.
08 · Quote
Send this and we will quote in 24 hours
- Spring type and quantity
- Drawing, dimensioned photo, or the old spring
- Material, or where the part lives (dry, damp, outdoors)
- Any finish (plating is through partners)
09 · Questions
FAQ
What is the minimum order quantity?
How fast do you quote?
Can you copy a spring from a sample?
When should ends be closed and ground?
What is spring index, and why do you mention it?
Will a long, thin spring buckle?
What wire sizes do you work with?
Request for quotation
Send your drawing or sample. Get a quote within 24 hours.
Tell us the spring type, quantity and what it has to do. Our usual minimum order is 5,000–10,000 pcs; smaller development runs are charged.