1623 Dunbier A1266 Mackay Axle 50 Square Gull-Wing Beam Only 2150mm (85) | Marine Trailer Part

🔧 Product Description

Dunbier 50mm Square Gull-Wing Axle Beam Only 2150mm (85") – Part Number: 1623

A 50mm square marine-trailer axle beam only with an overall length of approximately 2150mm / approximately 85". 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
• Gull-Wing axle geometry
• Overall axle length approximately 2150mm / approximately 85"
• Configured for beam only
• Designed for galvanised marine-trailer suspension and hub systems
• Gull-wing drop shape provides hull and chassis clearance on compatible Dunbier trailers

📏 Specifications

• Beam section: 50mm square
• Overall length: Approximately 2150mm / approximately 85"
• Indicative chassis/spring-centre width: Approximately approximately 1720–1725mm
• Brake or hub configuration: beam only
• Wheel/hub pattern: Ford five-stud 1/2-inch UNF, 114.3mm PCD where hubs or discs are supplied
• 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
• Designed for the Dunbier gull-wing chassis layout
• Common wheel size application: 13- and 14-inch trailer wheels

🔄 Cross Reference & Related Parts

• Dunbier: 1623
• Mackay: A1266
• Ford Slimline emergency hub kit: Dunbier 1666
• Ford 1/2-inch wheel nuts and studs: Dunbier 1661C, 1664C, 1669 and 1674C
• 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
• Gull-wing axles are catalogued for specific Dunbier chassis layouts and should not be treated as universal straight-axle replacements

🔌 Function

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

⚠️ Common Signs of Failure

• 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 gull-wing axle beam without hubs or brakes
• Supplied in original or equivalent packaging