A stainless coil flat spring with a black plated finish, for mechanisms where the spring is visible and must not stand out. The stainless strip provides the mechanical behaviour and the black finish provides the appearance.
Suits equipment where a bright stainless coil would draw the eye or throw light into an optical path.
The spring behaviour and corrosion resistance come from the strip, not from the plating.
Configuration is designed to the requirement, with the finish applied afterwards.
Inspect the finish at the flexing region during early production. If wear appears there, the honest answer is usually to accept a plain stainless spring rather than to chase a coating that cannot survive the duty.
Bright coil springs conspicuous in dark finished equipment
Coated carbon steel springs cracking their finish where the strip flexes
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 plain stainless coil spring, the black plated version is chosen purely for appearance and carries a small risk of finish wear at the flexing zone.
Adhesion under flexing is checked at sampling, since that is the specific risk with a coated flat spring.
Not meaningfully. The plating is thin relative to the strip thickness.
Matching is confirmed on samples against your own parts.
Send your drawing, dimensions or a sample. We will confirm the specification and come back with a price and a lead time.
