1613g Dunbier Axle 50 Square Beam Only 2170mm (85.5") | Marine Trailer Part

🔧 Product Description

Dunbier 50mm Square Axle Beam Only 2170mm (85.5") - Part Number: 1613G

A 50mm square marine-trailer axle beam only with an overall length of approximately 2170mm / 85.5". It provides the structural axle beam and machined bearing journals for a compatible hub system, allowing the installer to select the required lazy-hub or braking configuration.

⚙️ Key Features

• 50mm square axle construction

• Straight axle geometry

• Overall axle length approximately 2170mm / 85.5"

• Configured for beam only

• Designed for galvanised marine-trailer suspension and hub systems

📏 Specifications

• Beam section: 50mm square

• Overall length: Approximately 2170mm / 85.5"

• Indicative chassis/spring-centre width: Approximately approximately 1725mm

• Brake or hub configuration: beam only

• Wheel/hub pattern: Ford five-stud disc/hub pattern where fitted

• Slimline bearing family: Inner L68149 cone with L68110 cup

• Slimline bearing family: Outer LM12749 cone with LM12710 cup

• Standard rear seal commonly catalogued as Dunbier 1706

• Marine seal alternative commonly catalogued as Dunbier 1716 where the hub and journal suit

🔄 Cross Reference & Related Parts

• Dunbier: 1613G

• Ford-pattern hub and wheel hardware is commonly used on these Dunbier brake axles; verify the installed PCD and stud thread

• Use Dunbier LM or Slimline bearing kits only according to the axle journal size

• Hub, bearing, seal, brake and spring components must be selected by axle journal and installed configuration

• Comparable axles from AL-KO, Mackay, Trojan or other manufacturers are not direct replacements unless beam length, spring centres, journal size, brake offset and wheel track all match

🚤 Trailer Compatibility & Application

• Suitable for compatible Dunbier marine trailers using the stated beam size, overall length and spring-centre geometry

• Measure the existing axle from hub face or axle end using the same method as the replacement catalogue before ordering

• Confirm wheel offset, tyre clearance, mudguard clearance and boat-hull clearance

• Axle capacity is determined by the complete axle, bearings, hubs, springs, tyres, brakes and trailer certification—not beam size alone

• Hubs, bearings, seals, brake components and wheel nuts are not included unless specifically stated

🔌 Function

Supports the trailer load between the suspension and wheel hubs while maintaining wheel track, bearing alignment and brake mounting geometry.

Common signs of wear or replacement:

• Axle beam is bent, twisted or visibly cracked

• Tyres wear unevenly because wheel alignment or camber has changed

• Bearing journals are scored, undersize, corroded or heat-discoloured

• Spring seats, brake flanges or welds are cracked

• Persistent bearing looseness remains after correct adjustment

🛠️ Installation & Safety

• Axle replacement and brake setup should be completed by a competent trailer technician

• Support the trailer on rated stands before removing suspension or hub components

• Align spring centres and axle orientation before tightening U-bolts

• Fit new bearing seals, correctly pack bearings and set bearing end float

• Verify wheel-nut torque, brake operation and tyre clearance before road use

📦 Condition

• Brand new Dunbier Marine Products trailer component

• Supplied as one axle beam without hubs or brake components

• Supplied in original or equivalent packaging