A torsion spring made for gym and exercise machines, where the load is a person and the cycle count is high. The part is designed around the torque at the working angle and the fatigue life required, rather than around a nominal free dimension.
Exercise equipment springs are loaded to near their working limit thousands of times, which makes fatigue the governing design factor.
Shot peening puts the surface into compression and directly extends the fatigue life of a heavily cycled spring.
Where a machine uses several identical springs, they are run and packed together so the resistance is even across the equipment.
Replace springs as a matched set rather than individually. Mixing a new spring with worn ones puts uneven resistance into the machine and accelerates the remaining originals.
Springs failing at the leg root after months of heavy gym use
Uneven resistance between two sides of a machine because the springs came from different batches
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 | Torsion 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 industrial torsion spring, an exercise equipment part is designed with far more fatigue margin, which usually means larger wire or more coils for the same nominal torque.
Tell us the target cycle count and the working angle, and material, wire size and peening are chosen against it.
For gym equipment it usually should. Design the mounting so the spring can be changed without dismantling the frame.
Yes. OEM drawings and specifications are standard work here.
Send your drawing, dimensions or a sample. We will confirm the specification and come back with a price and a lead time.
