Also searched as: Tubular Shaft · Solid Keyed Shaft
The torsion shaft carries the spring torque to the cable drums: tubular (hollow) shafts for standard duty, solid keyed shafts for heavy torque, sized to door width and torque demand and galvanized against corrosion [ESTIMATE]. The shaft is the backbone of the lift system — undersized shafts twist and deflect, and drums keyed to them lose timing between sides of the door. Torque demand follows τ=kt·θ from the springs, with lift force F=τ/r at the drums [SOURCED https://www.firgelliauto.com/blogs/engineering-calculators/torsional-spring-calculator].
RAX machines torsion shafts in the same factory as the torsion springs, cable drums and cables that ride on them, so keyways, drum keys and spring cone bores are checked as one assembly. Shafts are cut to door width, galvanized, and shipped with center supports, drums and springs as a matched lift kit with technical drawings and batch traceability.
Tubular/solid-keyed construction and sizing practice 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 Shaft (also: Tubular Shaft · Solid Keyed Shaft) |
| Category | OEM Door Components |
| Size range | Shaft cut to your door width with diameter sized to torque demand [ESTIMATE]; tubular or solid keyed, with keyways matched to RAX cable drums and spring cones. From prototype to container-load delivery. |
| Materials | Galvanized steel, tubular (hollow) or solid keyed construction [ESTIMATE]; keyways machined to drum and cone fitment. |
| 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 door width and spring torque (τ=kt·θ [SOURCED https://www.firgelliauto.com/blogs/engineering-calculators/torsional-spring-calculator]); we size shaft diameter to resist twist.
Tubular for standard duty, solid keyed for heavy torque and wide doors [ESTIMATE].
Keyways must match drum and cone bores — sourcing shaft, drums and springs together eliminates mismatch.
Center-support spacing follows door width [ESTIMATE]; RAX supplies the matched brackets.
RAX supports full private-label production of the Torsion Shaft: 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 shafts are supplied tubular or solid keyed [ESTIMATE], cut to your door width with diameter sized to spring torque (τ=kt·θ [SOURCED https://www.firgelliauto.com/blogs/engineering-calculators/torsional-spring-calculator]) and keyways matched to RAX drums and cones. Send door width and spring data, or order the complete matched lift kit; from prototype to container-load, full flexibility on order quantity.
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.
