Made to drawing or sample
Conical springs
Tapered compression springs. The coils nest into each other, so the solid height can be as low as a few wire diameters.
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 |
|
| Shape | Tapered coils, large OD and small OD 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 conical spring is a compression spring whose coil diameter tapers from a large end to a small end. As it is pressed, the larger coils can seat over the smaller ones, so the solid height can be only a few wire diameters plus the closed ends.
The rate is not a single number. It usually rises as more of the large coils go solid. That is useful on a battery contact or a push-button, where you want a soft start and a firmer finish. It is a poor choice if you need a linear rate over a long stroke — use a cylindrical compression spring for that.
Same wire range as the rest of our unit: 0.40–2.50 mm. Same materials. Ends can be open, closed or ground, independently at each end if the drawing says so.
03 · Variants
Types and ends
A barrel (convex) or hourglass (concave) is a cousin of the cone. Send the drawing. If the part is a simple taper in our wire range, that is a regular job.
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
- 02Large-end outer diameter
- 03Small-end outer diameter
- 04Free length
- 05Number of coils
- 06End treatment at each end
- 07Load at working height, if you have it
- 08Material and any finish
- 09Quantity
Give both outer diameters and the free length. Say which end sits in the pocket and which end sits on the pin. If the large end must not pass through a hole, say so — that is a go / no-go dimension, not a decoration.
06 · Use
Where this spring is used
Battery contacts, push-buttons, light switchgear, and any pocket that is wide at one end and tight at the other. Instrumentation and small automotive switches use this shape when a straight spring would stack too tall.
07 · Process
How we make it
The coil diameter is reduced along the body as we form it, then the batch is stress-relieved. Ends can be closed or ground if the drawing asks. 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 is a conical spring better than a straight compression spring?
Do you make barrel or hourglass springs as well?
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.