Product Description
Our heavy-duty semi-trailer kingpin is built to connect tractors and semi-trailers safely, reliably, and for the long haul. It's made for real-world use in logistics, construction, and long-distance transport, handling constant stress, turning, and heavy loads without failure.
Specifications
|
Item |
Details |
|
Material |
42CrMo alloy steel |
|
Standard |
SAE J700, ISO 4086 |
|
Size |
2″ (50mm) / 3.5″ (90mm) |
|
Hardness |
38–42 HRC |
|
D-Value |
150–320 kN |
|
Mount Type |
Bolt-on / Welded |
|
Certificates |
ISO, CE, SGS |
Key Advantages
- Lightweight alloy construction reduces trailer weight, improves handling, and lowers fuel use.
- High-strength casting and heat treatment resist bending, cracking, and fatigue under heavy loads.
- Corrosion-proof finish stands up to rain, salt, and dirt for longer outdoor service life.
- Precision drilling ensures perfect fit and balanced rolling, reducing tire wear.
- Universal design fits most standard trailer hubs and tire sizes.
Customer Reviews
"We run 50+ trailers and switched to this kingpin six months ago. No issues at all, even on rough roads. Strong, reliable, and worth every dollar." - Transport fleet manager, Germany
"Fits our trailers perfectly and installs fast. Our mechanics love how little maintenance it needs." - Workshop supervisor, Australia
Our Services
- Full technical support before and after purchase
- Custom sizes and mounting types available
- Fast sample provision
- On-time mass production
- Multilingual support
FAQ
Q: What's the difference between 2″ and 3.5″ kingpins?
A: 2″ is for standard trailers; 3.5″ is for heavy-duty and overweight loads.
Q: Is this semi-trailer kingpin compatible with my fifth wheel?
A: Yes, it matches all SAE-standard fifth-wheel couplers.
Q: How long does a kingpin last?
A: With normal use and lubrication, it lasts 3–5 years or up to 700,000 km.
Q: Do you offer welded and bolted versions?
A: Yes, both are available to match your trailer structure.
Q: Can you customize the plate thickness or bolt pattern?
A: Yes, we accept custom designs based on your drawing or sample.
Q: What certificates do you have?
A: We provide ISO, CE, SGS, and other safety certificates for customs and inspection.
Q: Do you provide after-sales service?
A: Yes, we offer technical support, warranty coverage, and replacement support worldwide.
Hot Tags: semi-trailer kingpin, China semi-trailer kingpin manufacturers, suppliers, Semi trailer Kingpin, home traction machines, home traction unit, in home traction machine, traction units, Trailer Cross type Towing Pin
