Description
ZF BW 461 5.03 Gearbox
The ZF BW 461 is a heavy-duty marine reversing reduction gearbox from the ZF 4600 series, featuring a gear ratio of approximately 5.037:1 (often noted as 5.03:1). It is designed for high-power commercial and pleasure craft propulsion systems handling up to roughly 1200–1260 kW.
Key Specifications
- Model: ZF BW 461
- Reduction Ratio: 5.037:1 (5.03)
- Power Capacity: Up to ~1200–1260 kW (approx. 1600–1700 hp) depending on application and input speed
- Dry Weight: Approx. 1300 kg to 1450 kg
- Cooling: Integrated oil cooler (such as Behr)
Design Features
- Configuration: Available in angle (A-version) or parallel/vertical offset configurations depending on exact drivetrain layout
- Mounting: Supports bell housing sizes 0 and 00 for direct close-coupled mounting to compatible marine diesel engines, or remote setup via a cardan shaft
- Auxiliaries: Includes integrated hydraulic connection provisions, control valve, and options for integrated oil filter/cooler assemblies
- Clutch Assemblies: Employs multi-disc clutches utilizing steel/sintered discs, fully actuated via internal hydraulic oil pressure.
- Actuation Mechanisms: Features an integrated electro-hydraulic controller supporting electronic push-button shifting, complete with mechanical emergency manual overrides.
- Trolling Systems: Compatible with the ZF-Autotroll system. This provides adjustable clutch slippage to sustain low-speed vessel maneuvering below normal engine idle speeds.
