3119 Dunbier Rolla-Matic Mount 50mm Square | Marine Trailer Part
3119 Dunbier Rolla-Matic Mount 50mm Square | Marine Trailer Part
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🔧 Product Description
Dunbier Rolla-Matic Universal Mount for 50 × 50mm Cross Member – Part Number: 3119
A galvanised universal cross-member mounting plate and U-bolt arrangement for attaching a compatible Dunbier Rolla-Matic support assembly to a 50 × 50mm trailer cross member.
⚙️ Key Features
- Galvanised mounting plate
- Designed for 50 × 50mm rectangular cross member
- Includes matching U-bolts and mounting hardware as supplied
- Allows Rolla-Matic position adjustment
- Bolt-on installation
📏 Specifications
- Cross-member application: 50 × 50mm
- Mounting width/adjustment range: Approximately 135–160mm depending assembly
- Supports compatible 20mm or 40mm Rolla-Matic legs through the associated bracket arrangement
🔄 Cross Reference & Related Parts
- Dunbier: 3119
- 50 × 50mm mount: Dunbier 3119
- 76 × 50mm mount: Dunbier 3120
- 102 × 50mm mount: Dunbier 3121
- Related Rolla-Matic assemblies: Dunbier 3100, 3100SQ, 3102, 3103 and 3110
🚤 Trailer Compatibility & Application
- Suitable for a structurally sound 50 × 50mm trailer cross member
- U-bolt width and length must fit the actual cross-member dimensions
- Support-leg size must match the Rolla-Matic assembly
🔌 Function
Clamps the Rolla-Matic support securely to the trailer cross member while allowing its lateral and vertical position to be adjusted.
⚠️ Common Signs of Failure
- Plate or U-bolts are bent
- Mount moves on the cross member
- Threads are stretched or corroded
- Cross member is crushed beneath the clamp
- Rolla-Matic leg cannot be retained securely
🛠️ Installation & Safety
- Install on a clean straight section of cross member
- Tighten U-bolts evenly
- Do not crush thin-wall trailer tube
- Align paired mounts before loading the boat
- Recheck nut torque after initial road and ramp use
📦 Condition
- Brand new Dunbier Marine Products trailer component
- Supplied as one Rolla-Matic mount kit for a 50 × 50mm cross member
- Supplied in original or equivalent packaging
Shipping & Delivery
Shipping & Delivery
Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.
Returns & Warranty
Returns & Warranty
14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in new, unused condition for a refund or exchange. Manufacturer warranties apply to new parts. Full details in our Refunds & Returns policy.
Not sure this fits?
Not sure this fits?
Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.
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