Masson Marine Equipment
MM W20000 NR
Non-reversing marine reduction gearbox (Masson Marine W range) for workboats and dredgers; ratios 3.214–6.179, max rated input 4219 kW (5658 hp) at up to 1800 rpm, dry weight 5700 kg.
Description
The MM W20000 NR is a non-reversing marine reduction gearbox from Masson Marine's W range, designed for continuous duty in workboat and dredger applications. It is offered with ratios from 3.214 to 6.179 for engines up to 1800 rpm.
Technical data
- Ratios: 3.214, 3.317, 3.658, 4.364, 4.933, 5.593, 6.179
- Power rating: 2.344 kW/rpm (3.143 hp/rpm) for ratios 3.214–5.593; 2.000 kW/rpm (2.682 hp/rpm) at 6.179
- Maximum rated input: 4219 kW (5658 hp); 3600 kW (4828 hp) at ratio 6.179
- Maximum input speed: 1800 rpm
- Sample capacities (ratios 3.214–5.593): 2344 kW (3143 hp) at 1000 rpm, 2813 kW (3772 hp) at 1200 rpm, 3750 kW (5029 hp) at 1600 rpm
- Dry weight: 5700 kg (12570 lb)
Key features
- Robust design with easy onboard maintenance
- Hydraulically actuated multi-disc clutch
- Case-hardened, precision-ground gear teeth for long life and smooth running
- Robust cast iron casing for direct or remote mounting
- Emergency "get home" capability
- Fully works tested; design, manufacture and quality control to ISO standards
Standard equipment
- Oil cooler with fittings and flexible hoses
- Integrated brackets
- Free-standing design
- Lube oil pump
Options
- Engine-matched torsional coupling
- Propeller shaft flange and coupling bolt set
- Classification by all major classification societies
- PTO (live or clutchable)
- Electric trolling valve for slow-speed drive
- Shaft brake
- Electric clutch control
Specifications
| Model | kW/RPM (hp/RPM) | Maximum Rated Input kW (hp) | Maximum RPM | Ratio | Sample Ratio Capacities kW (hp) | Dry Weight kg (lb) | col8 | col9 |
|---|---|---|---|---|---|---|---|---|
| 1000 rpm | 1200 rpm | 1600 rpm | ||||||
| MM W20000 | 2,344 (3,143) | 4219 (5658) | 1800 | 3,214 | 2344 (3143) | 2813 (3772) | 3750 (5029) | 5700 (12570) |
| 3,317 | ||||||||
| 3,658 | ||||||||
| 4,364 | ||||||||
| 4,933 | ||||||||
| 5,593 | ||||||||
| 2000 (2,682) | 3600 (4828) | 6,179 | 2000 (2682) | 2400 (3218) | 3200 (4291) |
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