3290 Dunbier Roller Arm Bubble Plate, Suits Steel Roller Arms | Marine Trailer Part

🔧 Product Description

Genuine Dunbier Marine Products Supa-Rolla Bubble Plate for Steel Roller Arms – Part Number: 3290

A galvanised steel-arm bubble plate used at the pivot point of compatible Dunbier roller arms. The shaped plate allows the arms to articulate while spreading clamping load from the U-bolts.

⚙️ Key Features

• Purpose-shaped Supa-Rolla pivot plate
• Designed for steel roller arms
• Allows roller-arm articulation
• Provides U-bolt clamping and arm location
• Replacement for bent, cracked or worn original plates

📏 Specifications

• Arm material compatibility: Steel
• Plate-hole spacing and U-bolt centres must match the roller assembly
• Rubber bubble-plate strip is supplied separately where required

🔄 Cross Reference & Related Parts

• Suits steel Supa-Rolla and Rolla-Matic roller arms
• Complete arm assembly: Dunbier 3261

🚤 Compatibility & Application

• Install only with the matching arm profile and U-bolts
• Tighten evenly while preserving required arm movement
• Inspect the mating arm holes and rubber strip during replacement

🔌 Function

Locates the roller arms and permits controlled articulation so multiple wobble rollers share the hull load.

⚠️ Common Signs of Failure

• Plate is bent, cracked or deeply worn
• Bolt holes are elongated
• Arm movement is seized or excessively loose
• U-bolts no longer clamp evenly
• Rubber isolator is missing or deteriorated

📦 Condition

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