R2181G Mackay 16mm x 390mm Galvanised Roller Shaft | Marine Trailer Part

🔧 Product Description

Mackay Galvanised Roller Shaft 16mm × 390mm – Part Number: R2181G

A galvanised steel roller shaft measuring 16mm in diameter and approximately 390mm long. It passes through the trailer bracket and roller bore to provide the axle on which the roller rotates.

⚙️ Key Features

• Galvanised steel construction
• Diameter: 16mm
• Length: 390mm
• Designed for boat-trailer roller brackets
• Replaceable service shaft

📏 Specifications

• Nominal shaft size: 16mm × 390mm
• Retention may use split pins, washers, clips or nuts depending on bracket design

🔄 Cross Reference & Related Parts

• Mackay: R2181G
• Roller bore, bracket outside width and retention method must all match

🚤 Trailer Compatibility & Application

• Suitable for rollers whose bore and bracket width match the shaft
• Do not substitute a smaller shaft even when the roller length appears correct

🔌 Function

• Carries the roller and transfers hull load into the roller bracket while allowing rotation.

⚠️ Common Signs of Failure

• Shaft is bent, grooved or worn undersize
• Galvanising is lost and heavy corrosion is present
• Retention holes or threads are damaged
• Roller binds because the shaft is distorted
• Bracket holes have worn into the shaft

🛠️ Installation & Safety

• Support the boat before removing a loaded shaft
• Replace worn washers and retaining pins
• Fit squarely through aligned holes
• Confirm the roller turns freely
• Secure both ends using the original method

📦 Condition

• Brand new Mackay trailer component
• Supplied as one galvanised roller shaft
• Supplied in original or equivalent packaging