A compression spring with a linear, constant rate across its working range, so that force and deflection stay proportional. Mechanisms that measure, regulate or balance need this predictability more than they need a particular maximum force.
A constant pitch cylindrical design keeps the rate steady, so deflection is a reliable indicator of force.
A constant rate spring can be designed into a mechanism on paper, which progressive designs make far harder.
Rate is verified with tensile and force testing rather than inferred from geometry.
Keep the working range within the middle portion of the spring's travel. Rate linearity breaks down as the spring approaches solid height.
Progressive rate springs making a measuring mechanism non-linear
Rate varying between batches so a device needs recalibrating each time
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 conical or tower spring, the constant rate cylindrical design gives predictability instead of space saving. They solve opposite problems.
Variable pitch, conical geometry, or coils bottoming out in service. A constant rate design avoids all three within the working range.
Tell us the band you need. It is achievable within limits set by wire tolerance and coil geometry, which we will discuss honestly rather than promise blindly.
No. Near solid height, coils begin to touch and the rate rises sharply. Design so the working range stays clear of that.
Send your drawing, dimensions or a sample. We will confirm the specification and come back with a price and a lead time.