R2189G Mackay 20mm x 185mm Roller Shaft Galvanised | Marine Trailer Part

🔧 Product Description

Mackay Galvanised Roller Shaft 20mm × 185mm - Part Number: R2189G

A galvanised steel roller shaft measuring 20mm in diameter and approximately 185mm 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: 20mm

• Length: 185mm

• Designed for boat-trailer roller brackets

• Replaceable service shaft

📏 Specifications

• Nominal shaft size: 20mm × 185mm

• Retention may use split pins, washers, clips or nuts depending on bracket design

🔄 Cross Reference & Related Parts

• Mackay: R2189G

• 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 wear or replacement:

• 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