ID
976990
$ 1,467.17
1-2 weeks delivery time
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The Vetus RULAG31/2 cutlass bearing is engineered for a 3-1/2" propeller shaft and features a brass outer shell with a 4-1/2" outside diameter and a 14" length. Its polyurethane-rubber lining incorporates longitudinal grooves for stable water lubrication and cooling, while the corrosion-resistant brass casing provides long-term durability for marine applications using fully imperial shaft and stern-tube dimensions.
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Vetus RULAG31/2 Brass Cutlass Bearing for 3-1/2" Marine Propeller Shaft
The Vetus RULAG31/2 cutlass bearing is designed for propulsion systems that utilize imperial (inch-based) shaft and stern tube specifications. Built for a 3-1/2" shaft and intended for installation in a stern tube with a 4-1/2" outside diameter, this bearing features a durable brass shell and a polyurethane-rubber lining. Longitudinal grooves inside the lining ensure continuous water flow, promoting efficient lubrication and cooling during operation.
Manufacturer Vetus Model RULAG31/2 Shaft Diameter 3-1/2" Outside Diameter 4-1/2" Length 14" Shaft Diameter (mm) 88.9 mm Length (mm) 355.6 mm Shell Material Brass Rubber Lining Polyurethane with longitudinal grooves Shell Size (inch) 4 1/2
Key Features
- Strong brass outer shell providing structural rigidity and corrosion resistance.
- Polyurethane-rubber lining with high resistance to wear.
- Grooved inner surface ensuring stable water lubrication and thermal control.
- Fully imperial (inch-based) compatibility for shaft and stern tube installations.
- Suitable for both motorboats and sailing yachts.
Technical Function
Cutlass bearings are essential for supporting and accurately aligning the propeller shaft. The grooved polyurethane lining maintains a consistent water film along the bearing surface, reducing friction, vibration, and heat buildup, ensuring long-term operational stability in demanding marine environments.
When to Choose Brass vs. Phenolic Bearings
- Brass bearings: Ideal for standard marine systems requiring mechanical strength, long service life, and corrosion resistance.
- Phenolic bearings: Recommended for aluminum stern tubes or installations where galvanic corrosion must be prevented.
Vetus rubber bearings for larger shaft diameters are available on special order.
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