kingpin

What is a trailer "Kingpin"?

faqs -> product-knowledge

A Kingpin is a heavy duty attachment pin that extends below the trailer bed plate. During coupling, this locks into the tractor unit fifth wheel.

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FAQ | What is a step-frame / swan-neck

The swan-neck (or goose-neck) is a section of a trailer chassis where the height drops from a first level (to suit the fifth wheel height) to a second, lower level. These types of chassis are known as Step-Frames.

Published: Tue 21 Nov 2023

rubbing plate 2

FAQ | What is the bed plate / rubbing plate?

The bed plate (or rubbing plate) is a heavy duty horizontal plate on the underside of the front of the trailer which is designed to sit and slide on top of the tractor fifth wheel. It houses the kingpin.

Published: Tue 21 Nov 2023

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FAQ | What Is Split Coupling?

Split coupling is the frowned-upon practice of reversing the tractor fifth wheel under the trailer bed plate just enough to support the trailer but not enough to couple positively with the trailer kingpin.

Published: Fri 17 Nov 2023

fifth wheel

FAQ | What is a fifth wheel?

A fifth wheel is the horizontal coupling plate on a tractor unit which slides underneath the trailer bed plate during coupling. It has jaws which clamp onto the kingpin.

Published: Fri 17 Nov 2023

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IP 56K rated7 pin ASS2. 1 connector, bulbs includedOptional side LED stalk markersLED Version .

Published: Tue 18 Jul 2023

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Smart Kingpin: Continuous monitoring, alerts potential issues, ensures safety, UNECE Approval. Ideal for new builds or retrofitting.

Published: Wed 15 Feb 2023

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Updated: Mon 05 Aug 2024

Don-Bur (Bodies & Trailers) Ltd

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