A heavy compression spring wound from 6 mm wire with a black coating, for industrial machinery where the load is substantial and the spring is a structural element. At this wire size the spring is designed around solid height and buckling as much as around rate.
6 mm wire sits near the top of our range and carries loads where a lighter spring would simply be compressed solid.
Tall heavy springs buckle if the length to diameter ratio is wrong. That ratio is checked at design rather than discovered in service.
Keeps heavy machinery hardware visually consistent and provides more protection than a bare surface.
Fit heavy compression springs over a guide rod or into a bore where the length to diameter ratio calls for it, and never use a spring as a hard stop at the end of travel.
Springs compressed to solid height in service, which destroys them quickly
Tall springs buckling sideways under load and jamming the mechanism
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 stacking two lighter springs, a single 6 mm spring gives a predictable rate and one component to handle, at the cost of needing the full envelope in one place.
Give us the maximum travel of your mechanism, not just the working load. We size solid height to stay clear of it.
When the free length exceeds roughly four times the mean coil diameter, buckling becomes likely and a guide is advisable. We flag this at design.
Yes, and it is worth specifying on heavy springs that cycle frequently.
Send your drawing, dimensions or a sample. We will confirm the specification and come back with a price and a lead time.