Masson Marine Equipment
MM W4400
Reverse reduction marine gearbox (Masson Marine W range) with ratios 3.026–5.913, max rated input 1134 kW (1521 hp) at up to 2100 rpm, dry weight 1270 kg; non-clutchable electric-drive version available.
Description
The MM W4400 is a reverse reduction marine gearbox from Masson Marine's W range with hydraulically actuated multi-disc clutches, designed for continuous duty in workboat and dredger applications. It is offered with ratios from 3.026 to 5.913; a non-clutchable version for electric motor drive is available on request.
Technical data
- Ratios: 3.026, 3.486, 4.032, 4.448, 5.077, 5.542, 5.913
- Power rating: 0.540 kW/rpm (0.724 hp/rpm)
- Maximum rated input: 1134 kW (1521 hp)
- Maximum input speed: 2100 rpm (can be upgraded to 2300 rpm in specific projects)
- Sample capacities: 648 kW (869 hp) at 1200 rpm, 864 kW (1159 hp) at 1600 rpm, 972 kW (1303 hp) at 1800 rpm
- Dry weight: 1270 kg (2800 lb)
Key features
- Robust design with easy onboard maintenance
- Hydraulically actuated multi-disc clutches
- 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
- Suitable for twin installation with 100% rated power ahead and astern
Standard equipment
- Oil cooler with fittings and flexible hoses
- 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 |
|---|---|---|---|---|---|---|---|---|
| 1200 rpm | 1600 rpm | 1800 rpm | ||||||
| MM W4400* | 0,540 (0,724) | 1134 (1521) | 2100* | 3,026 | 648 (869) | 864 (1159) | 972 (1303) | 1270 (2800) |
| 3,486 | ||||||||
| 4,032 | ||||||||
| 4,448 | ||||||||
| 5,077 | ||||||||
| 5,542 | ||||||||
| 5,913 |
More from Masson Marine
- Masson Marine MM W2800Y Twin Input Single Output Gearbox
- Masson Marine MM W1950
- Masson Marine EM311
- Masson Marine EM540
- Masson Marine EM611
- Masson Marine Dual Speed Gearboxes (W3300 DS, W3450 DS, W5200 DS)
- Masson Marine E-Range Gearboxes for Synchronous Motors
- Masson Marine MM W3300 DS Dual-Speed Gearbox
- Masson Marine MM W3450 DS Dual-Speed Gearbox
- Masson Marine MM W5200 DS Dual-Speed Gearbox
- Masson Marine PTI Type 1
- Masson Marine PTI Type 1G
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