A precision compression spring in high carbon steel with a black coating, made where force tolerance is the governing requirement. Precision here means the spring is tested against a force band rather than only measured for dimensions.
The acceptance criterion is force at a working height within an agreed band, which is what a precision mechanism actually requires.
High carbon wire delivers high force in fine diameters, which is what makes compact precision springs possible.
Precision tensile strength testers verify that the material and heat treatment produced the expected behaviour.
State the working height in your incoming inspection instruction so that both sides measure force at the same point. Most force disputes come from measuring at different heights.
Springs within dimensional tolerance but outside the force band the mechanism needs
Force drifting after a device has been calibrated
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 general purpose compression spring of the same size, the difference is the acceptance criterion and the testing behind it, not the steel.
Yes, and for precision springs that is the sensible way to specify. Give us the force, the height and the acceptable band.
Heat treatment and set removal are part of the standard route, which is what stops a spring relaxing after it is installed.
Not without protection, and even coated it is not an outdoor material. For wet precision work, stainless is the right base.
Send your drawing, dimensions or a sample. We will confirm the specification and come back with a price and a lead time.