Fifth Wheel Manufacturer | Heavy-Duty Tractor Couplings for Semi-Trailers

Global heavy truck parts exporter . ISO 9001 & IATF 16949 certified fifth wheel couplings (EN-GJS-600, ASTM A105). OEM designs for 20-50 ton GVW. Request CAD & load test reports!

Inquire Now Next Product

Introduction Photos

Introduction

What is a Fifth Wheel?

A fifth wheel (also called tractor coupling or semi-trailer hitch) is the pivotal connection between a tractor truck and semi-trailer. Our couplings ensure safe load transfer and articulation for heavy-duty logistics, construction, and mining operations.

Industry Synonyms:

Truck Fifth Wheel
King Pin Coupling Assembly
Semi-Trailer Hitch

Fifth wheel

Why Choose Our Fifth Wheels?

✅ Certified Vertical Manufacturing

IATF 16949 Compliance: Automotive-grade production for global truck OEMs.
Foundry Expertise: 12-ton induction furnace with <0.03% sulfur content.
Precision Machining: 5-axis CNC ensures ±0.1mm lock jaw alignment.

✅ Extreme-Duty Performance

Fatigue Testing: 2 million cycles at 30-ton dynamic load (ISO 3777).
Temperature Resilience: Operates from **-40°C to +120°C** (arctic grease optional).

✅ Fast Customization

OEM Adaptations: Modify king pin size (2" / 3.5"), jaw type (fixed/sliding), and coating (epoxy/powder).
Lead Times: 25 days for standard couplings; 40 days for custom orders.

Applications

Industry	Use Case	Key Feature
Logistics	40-ton Container Transport	EN-GJS-600 with 50-ton rating
Mining	Off-Road Dump Truck Trailers	ASTM A105 forged steel plate
Construction	Low-Bed Trailer Heavy Equipment Haul	Zinc-aluminum anti-corrosion coating

Quality Assurance

Dimensional Reports: CMM inspection of critical interfaces.
Performance Tests: 1.5x overload validation & jaw engagement force tests.

树脂砂生产线(1).png

Get Samples & Support

🔧 Service Process

Submit Requirements: Email tractor/trailer specs to zbw@tiegu.net.
Technical Review: DFM report & 3D model within 4 business hours.
Sample Approval.

📩 Contact

Email: zbw@tiegu.net (Subject: [Fifth Wheel] + GVW Rating)
Online Form: Request Quotation

Photos