Winding cones are what connect a torsion spring to the door: the cones anchor the spring ends to the torsion shaft and transfer the winding torque into the lift system, with set-screw fixing as the standard attachment [ESTIMATE]. Cone fit — bore, keyway/set-screw engagement and shaft diameter — decides whether torque transfers cleanly or the spring walks on the shaft.
RAX supplies torsion springs complete with cones and set screws, wound in the same factory as the torsion shafts and cable drums they work with, so bore-to-shaft fit is checked at assembly, not discovered on site. Torque sizing follows τ=kt·θ with drum force F=τ/r [SOURCED https://www.firgelliauto.com/blogs/engineering-calculators/torsional-spring-calculator]; every set is validated in the 100,000-cycle fatigue lab and shipped with batch traceability.
Cone anchoring and set-screw fixing are industry conventions [ESTIMATE]. Torque relations are verified [SOURCED https://www.firgelliauto.com/blogs/engineering-calculators/torsional-spring-calculator]. RAX-specific claims are from the approved brand brief.
Custom width × height, RAL color and configuration. Large industrial doors from prototype to container-load, full flexibility on order quantity.
Validated against a 100,000-cycle fatigue testing protocol in our in-house lab.
ISO 9001:2015 and CE to EN 13241 / EN 12453, with SGS material reports.
English manual + wiring diagrams; operators pre-set before dispatch.
| Product | Torsion Spring with Cones |
| Category | OEM Door Components |
| Size range | Spring + cones assembled to your shaft diameter, wire gauge, inside diameter and wind direction; torque matched to door weight and drum radius [SOURCED https://www.firgelliauto.com/blogs/engineering-calculators/torsional-spring-calculator]. Single or paired sets, from prototype to container-load. |
| Materials | Oil-tempered spring steel wire (ASTM A229 common spec [SOURCED https://www.amazon.com/dp/B0BRNVTKKQ]); steel winding cones with set-screw fixing [ESTIMATE]; galvanized or coated finish options. |
| Color / finish | Full RAL custom (common RAL9006 / 9010 / 7016 / 5010), wood-grain, PVDF, anodizing |
| Power | Not applicable — passive, unpowered component. RAX can supply matched operators, servo drives and smart controls from its full-category one-factory range. |
| Certification | CE EN 13241 / EN 12453; product-specific test data confirmed per project |
| Order | Custom engineered to your exact opening, specification and RAL color |
Give the shaft diameter and profile — cone bore and set-screw engagement must match exactly [ESTIMATE].
We calculate from door weight and drum radius: τ=kt·θ, F=τ/r [SOURCED https://www.firgelliauto.com/blogs/engineering-calculators/torsional-spring-calculator].
Left/right wind must match the installation; cones differ by hand — confirm before ordering.
Springs shipped with cones fitted and torqued save assembly time and eliminate wrong-cone failures.
RAX supports full private-label production of the Torsion Spring with Cones: custom RAL panel colors, operator matching, packaging printing and installation-manual translation (EN/ES/FR/AR/RU). Start with an OEM sample and scale to container-load branded production. Custom molds, Tooling records are archived for up to 5 years — no extra tooling fee on repeat orders, all under strict NDA.
Industrial, commercial and garage doors and gates — the harmonized basis for CE marking.
Safety in use of power-operated doors — force limits and test methods for operators.
Wind (EN 12424), thermal (EN 12428), fire (EN 1634-1) etc. confirmed per product during enrichment.
Torsion springs with cones are supplied as ready-to-mount sets: cone bore matched to your shaft diameter, set-screw fixing standard [ESTIMATE], spring sized from door weight and drum radius (τ=kt·θ, F=τ/r [SOURCED https://www.firgelliauto.com/blogs/engineering-calculators/torsional-spring-calculator]). Send shaft size and door data, or a sample; RAX quotes matched sets from prototype to container-load.
We are a pure manufacturer and do not provide on-site installation. Every order ships with an English installation manual, wiring diagrams for your local installation team; operators are pre-set and tested before dispatch.
RAX holds ISO 9001:2015 and CE to EN 13241 (industrial door product standard) and EN 12453 (operator safety), with SGS material reports and product liability insurance. Components are engineered to help the finished door satisfy EN 12604 (mechanical aspects: strength, cycle durability, finger-pinch and spring/cable safety), and product-specific test data (fire, wind, thermal) is confirmed per project against the matching standard.
Yes. RAL panel colors, operator matching, packaging printing and manual translation (EN/ES/FR/AR/RU) are all supported, from an OEM sample to container-load branded production.
Sample 7–15 days; standard container 12–20 days; custom first order 20–35 days. Door body 2-year warranty, operator/motor 3 years (servo 5 years), with spare parts dispatched by DHL/FedEx within warranty.
Factory inspection report, 100,000-cycle fatigue test record, FAI / pre-assembly photos, English installation Manual + Wiring diagrams, CE Declaration of Conformity, and export packing (steel frame + pearl cotton + stretch film).
Or email info@raxdoor.com
Send your opening size and duty requirements — we reply with a proposal and lead time.
