JL55-L Aluminum Alloy Positioning Tube
55 mm Al-Si alloy seamless positioning tube, tensile withstand 7.4 kN — lightweight for high-speed duty.
Specifications
| Model | JL55-L |
|---|---|
| Standard | ≤250 km/h and 250–350 km/h aluminum cantilever systems (per OCS design) |
| Tensile Failure Load | Tensile withstand 7.4 kN |
| Materials | Aluminum-silicon alloy seamless tube |
| Installation | Carries the locator on aluminum cantilever systems, adjustable for stagger setting |
The JL55-L aluminum alloy positioning tube is made from aluminum-silicon alloy seamless tube: light, corrosion-resistant and suited to high-speed railway registration where lowering the moving mass at the point improves pantograph behaviour.
Specifications
- Tube bore: 55 mm
- Tensile withstand load: 7.4 kN
- Material: aluminum-silicon alloy seamless tube
The product is manufactured under CRCC railway product certification and an ISO 9001 quality management system, with incoming material inspection, in-process control on critical operations and batch-by-batch final inspection before delivery. Paired with the aluminum locator family and 3-5B70 registration eyes, it completes an all-aluminum registration point for high-speed lines.
Frequently Asked Questions
Why aluminum-silicon alloy for a positioning tube?
The Al-Si seamless tube combines strength (7.4 kN tensile withstand) with low weight and natural corrosion resistance — lowering the registration point's mass for high-speed dynamics.
What is the tube bore?
55 mm, matching the aluminum locator and eye family of the high-speed registration system.
Can it replace steel tubes in existing layouts?
Where the design allows aluminum tubes, yes — the interfaces match the aluminum fitting family; confirm against your cross-section drawing.
How is it protected against corrosion?
The aluminum-silicon alloy's natural oxide layer is the protection — no galvanizing needed, which also suits coastal and industrial atmospheres.
Performance
Operating Conditions
Outdoor service at OCS registration points on mainline, high-speed and station structures, subject to suspension, wind, ice and dynamic pantograph loads as defined by the OCS design.
Mechanical Performance
Seamless Al-Si tube rated 7.4 kN tensile withstand with substantially lower mass than steel equivalents.
Applications
High-Speed Lines
Lightweight tube for high-speed registration.
Corrosion-Prone Areas
Aluminum alloy resists atmospheric corrosion.
Low Moving Mass
Reduces the reacting mass under the pantograph.
Aluminum Systems
Pairs with 3-5B70 eyes and AL70 family.
