A1321-12" Mackay Deemax Integral Hub 12" Ventilated Stainless 6-Stud | Marine Trailer Part

🔧 Product Description

Genuine Mackay Marine Trailer Products DeeMaxx 12" Ventilated Stainless Integral Hub and Rotor – Six Stud – Part Number: A1321-12"

A premium marine-brake hub and 12-inch ventilated stainless-steel rotor assembly for heavy trailers. The six-stud LandCruiser pattern and ventilated stainless rotor provide high corrosion resistance and heat capacity for compatible DeeMaxx/Kodiak-style calipers.

⚙️ Key Features

• Galvanised or corrosion-resistant marine-trailer construction
• 6 stud × 139.7mm PCD wheel mounting pattern
• Heavy-duty DeeMaxx/US-style bearing configuration
• Designed for compatible mechanical or hydraulic trailer braking where specified
• Serviceable bearings, seals, dust cap and wheel studs

📏 Specifications

• Wheel-size application: Heavy-duty LandCruiser-pattern wheels
• Stud pattern: 6 stud × 139.7mm PCD
• Bearing family: Heavy-duty DeeMaxx/US-style
• Rotor/hub specification: 12-inch ventilated stainless integral hub/rotor
• Published application rating: heavy-duty trailer system; confirm exact axle and DeeMaxx rating
• Brake application: Hydraulic disc brake
• Wheel studs, bearing preload, seal and caliper alignment must follow the component specification
• Bearing references and integral-hub offset must be matched to the installed axle before supply

📋 Supplied Components

• 1 × DeeMaxx 12-inch ventilated stainless integral hub/rotor assembly

🔄 Cross Reference & Related Parts

• DeeMaxx slip-over stainless rotor reference: RTR-120-SS family
• MAAX-coated alternative: Mackay A1321MAX

🚤 Compatibility & Application

• Confirm wheel stud PCD, centre bore, bearing journals, seal surface and axle-nut thread
• Brake rotor thickness and offset must match the caliper and mounting bracket
• The complete running-gear capacity is limited by the lowest-rated axle, bearings, hub, wheel, tyre, brakes and suspension
• Set bearing preload and wheel-nut torque correctly after installation
• Flush and inspect regularly after saltwater immersion

🔌 Function

Supports the trailer wheel on tapered roller bearings and, on disc-hub versions, provides the friction rotor used by the brake caliper.

⚠️ Common Signs of Failure

• Bearing noise, heat or excessive wheel play
• Rotor is scored, cracked, warped or below minimum thickness
• Stud holes or wheel studs are damaged
• Seal leakage or water-contaminated grease
• Hub or rotor has excessive runout

📦 Condition

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