A coiled flat spring in stainless steel for industrial mechanisms, made to your force and travel requirement. The coiled strip form is chosen wherever a long stroke has to come from a compact installation.
The coil holds a long strip in a small diameter, delivering strokes a helical spring could not fit.
Near-constant force is the defining behaviour of this spring type and the reason to specify it.
No coating to crack where the strip flexes continuously through its working life.
Mount the coil so the strip unrolls in its natural direction. Reversing the direction of unroll puts the strip into bending it was not designed for and shortens its life sharply.
Long stroke mechanisms with no space for an extended helical spring
Force rising through the stroke where the mechanism needs it level
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 | Flat 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 long helical extension spring, a coiled flat spring gives a level force in a fraction of the installed length, at a higher cost and needing a drum to mount on.
Strip thickness and width. Stroke comes from the length of strip on the coil. The two are specified independently.
Usually on a drum, with the free end anchored to the moving part. Tell us the arrangement and we will design around it.
No. Constant force springs are designed for one force, which is why the requirement must be defined before production.
Send your drawing, dimensions or a sample. We will confirm the specification and come back with a price and a lead time.
