Bending Rail
— Precision Curved Rail & Circle Rail Fabrication
Precise forming that powers track turning and intelligent industrial transport.
In rail systems, “straight” is only part of the story. Smooth metro curves, circular motion for port cranes, and flexible turns for factory hoists all rely on accurate rail bending — the core process that ensures stable, safe operation.
Gldiamond specializes in custom bending and fabrication of rails. Backed by CNC cold-bending technology and a full-process inspection system, we deliver high-precision, made-to-order curved rails (curved rail) and circle rails (circle rail) for rail transit, port machinery, industrial equipment and specialized engineering projects.
Applications & Service Scope
We support many rail profiles and sizes for all curved-rail needs:
Railway & urban transit: metro, tram, light rail turnout/connection curves.
Port & terminal equipment: circular tracks for gantry cranes, container cranes.
Industrial plants & bridge cranes: arc tracks, circle rails, suspended conveyor rails.
Special scenarios: small-radius underground mine rails, rotating platform rails, amusement ride rails.
From tight radii of a few metres to long, gentle arcs of tens of metres — we deliver precise forming and fit-for-assembly accuracy.
Core Technology — CNC Precision Rail Bending (Cold Bending)
Process advantages
Ambient-temperature forming: preserves original rail microstructure, retaining base strength and toughness.
CNC control: automatic springback compensation for consistent bending accuracy.
Die compatibility: multiple dedicated dies to accommodate common profiles (P43, P50, QU70, QU80, QU100, R65, etc.).
High-precision inspection: laser scanning + total station measurement, accuracy controlled within ±2 mm.
Batch stability: full digital traceability ensures each rail has consistent curvature and tight joint fit.
Optional: Thermal Bending
For very large cross-sections, very small radii, or special installation needs we offer local hot-bending and die-assisted bending with post-heat treatment and performance testing to meet safety and service life requirements.
Quality Control System
Rail safety starts with rigorous process control. We operate under ISO 9001 and strict internal controls — full traceability from incoming material to shipment.
Customer Collaboration Process
Requirement & inquiry
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Technical review
↓
Drawing confirmation
↓
Sample bending
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Batch production
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Inspection & acceptance
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Shipment & installation support
Case Study
Case 1 — Overseas Crane Workshop (real project)
Material: QU70 rail
Bend radius: R = 4600 mm; total circular length ≈ 28.9 m
Structure: two concentric rails (upper + lower), each assembled from 6 segments
Upper rail: 6 equal segments, each 4814 ±2 mm
Lower rail: three sizes × 2 segments — 4873 ±2 mm, 5099 ±2 mm, 3794 ±2 mm
Services: custom fishplate holes at ends, dedicated curved fishplates, bend → finish machining workflow, assembly testing, anti-corrosion coating
Highlights: forming accuracy ±2 mm, fishplate fit ≤ 0.5 mm, smooth operation without jamming
Every degree of bend must be precise. Rail bending is more than shaping — it’s a combination of accuracy, strength, experience and testing. Gldiamond provides reliable, high-precision bending rail solutions to make track turning smoother and industrial operation more efficient.
Your rail project specialist | Gldiamond — Custom Bending Rail Center
Explore our full range of steel rails solutions and request a quote today. Partner with us for reliable, high-performance rails that drive efficiency in your operations.
Why Choose Us?
Flexible customization: accept CAD drawings and on-site measurements; handle irregular and composite curves.
Deep expertise: extensive springback compensation database and process parameter library.
Equipment strength: multiple CNC hydraulic bending machines, cold-forming lines and support equipment.
Complete inspection: laser scanners, total stations, ultrasonic and MPT equipment, hardness testers.
One-stop services: drilling, cutting, welding, assembly, grinding, anti-corrosion coating, etc.
Reliable delivery: protective packaging, segmented marking, and onsite technical installation support.