A tower, or conical, compression spring plated in nickel. The coils reduce in diameter along the body so that they telescope into one another when compressed, which gives a solid height close to a single wire thickness where a cylindrical spring would need many times that.
Telescoping coils let the spring compress almost flat, which makes it the answer where travel is long and installed depth is short.
As the larger coils bottom out first, the effective rate increases through the stroke, giving a soft start and a firm finish.
The conical profile resists buckling, so it can often be used where a cylindrical spring would need a rod or a bore.
Mount the spring with the large end against the fixed seat where possible. This keeps the smaller, more delicate end coils away from the moving contact face.
Cylindrical springs whose solid height uses up all the available space
Tall springs buckling in mechanisms with no room for a guide rod
Dimensional and load figures are set per order against your drawing or sample, so they are marked TBC rather than filled with catalogue numbers.
| Product Type | Compression Springs |
|---|---|
| Raw Material Options | Stainless steel, Spring steel, Carbon steel, 65Mn, Music wire |
| Wire Diameter Range | 0.1-8 mm |
| Surface Treatment Options | Zinc plating, Nickel plating, Silver plating, Gold plating, Tin plating, Galvanizing in various colours, Dacromet, Black oxide, Phosphating |
| Standard | ISO, non-standard and OEM drawings |
| Processing Route | Material sourcing → Coiling and forming → Heat treatment → Surface treatment → Quality inspection → Packing → Shipping |
| Inspection Equipment | Grinding and shot peening machinery; Precision tensile strength testers; Magnetic powder flaw detectors |
| Packing | Plastic bags, cartons or pallets, or packing to your own specification |
| Payment Terms | L/C, T/T, D/A, D/P, Western Union, 30% deposit before production, 70% balance before shipment |
| Lead Time | 7-15 days after the order is confirmed |
| Minimum Order Quantity | Quoted per part — tell us your requirement (TBC) |
| Dimensions and Load Rating | Made to your drawing or sample (TBC per part) |
Every batch follows the same seven step route, with tensile testing and magnetic powder flaw detection carried out before packing.
Available in Stainless steel, Spring steel, Carbon steel, 65Mn, Music wire, in wire from 0.1-8 mm, with any of our nine surface finishing routes. Geometry, end treatment and finish are all specified per order.
ISO 9001, SGS certificate and RoHS report (stated on the legacy site, certificates pending re-confirmation). Certificate copies are sent on request once re-confirmed.
Against a cylindrical spring of the same force, a tower spring occupies far less space when compressed and has a rising rather than constant rate, which suits some mechanisms and not others.
Only if the pitch and the diameter progression are designed for it. Tell us the closed height you need and we will confirm what is achievable.
No, and that is often the point. The rate rises as the larger coils close, giving progressive resistance.
It is chosen for appearance and wear where the spring is visible or handled. Zinc is the cheaper alternative for hidden positions.
Send your drawing, dimensions or a sample. We will confirm the specification and come back with a price and a lead time.