H3356 Mackay 1045 Dunbier 70mm Towball, Suits 6000kg | Marine Trailer Part

🔧 Product Description

Genuine Mackay Marine Trailer Products Machined 70mm Heavy-Duty Trailer Tow Ball – Part Number: H3356

A machined 70mm tow ball for heavy trailer couplings, including Dunbier coupling 1014. The tow ball is rated for compatible towing systems up to 6,000kg, subject to the lower rating of the towbar, coupling, vehicle and trailer.

⚙️ Key Features

• 70mm heavy-duty tow-ball diameter
• Rated to 6,000kg in a correctly matched installation
• Machined ball surface for accurate coupling fit
• Designed for high-capacity trailer applications
• Compatible with Dunbier 70mm heavy-duty coupling

📏 Specifications

• Ball diameter: 70mm
• Maximum tow-ball rating: 6,000kg
• Mounting shank, nut and platform dimensions must match the towbar
• Final towing capacity is limited by the lowest-rated component

🔄 Cross Reference & Related Parts

• Mackay reference: H3356
• Matching coupling: Dunbier 1014 / Mackay H3323G

🚤 Compatibility & Application

• Heavy-duty towbar tongues or coupling platforms engineered for a 70mm ball
• Use with 70mm couplings only
• Installation torque and towbar rating must be confirmed by the towbar manufacturer

🔌 Function

Provides the spherical pivot connection for the trailer coupling while carrying towing, vertical and braking loads.

⚠️ Common Signs of Failure

• Flattened, scored or undersized ball surface
• Loose mounting nut or movement in the tongue
• Cracks, corrosion or thread damage
• Coupling cannot be adjusted without excessive play
• Ball rating is lower than the intended trailer ATM

📦 Condition

• Genuine Mackay Marine Trailer Products part
• Brand new
• Supplied in original or equivalent packaging