Masson Marine Equipment
MM W3900
Reverse reduction marine gearbox (Masson Marine W range) with ratios 6.091–6.818, max rated input 857 kW (1149 hp) at up to 2100 rpm, dry weight 1270 kg.
Description
The MM W3900 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 high reduction ratios from 6.091 to 6.818 for high-speed engines.
Technical data
- Ratios: 6.091, 6.435, 6.818
- Power rating: 0.408 kW/rpm (0.547 hp/rpm) for 6.091–6.435; 0.388 kW/rpm (0.520 hp/rpm) for 6.818
- Maximum rated input: 857 kW (1149 hp); 815 kW (1093 hp) at 6.818
- Maximum input speed: 2100 rpm (can be upgraded to 2300 rpm in specific projects)
- Sample capacities (6.091–6.435): 490 kW (657 hp) at 1200 rpm, 653 kW (875 hp) at 1600 rpm, 734 kW (985 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 W3900 | 0,408 (0,547) | 857 (1149) | 2100* | 6,091 | 490 (657) | 653 (875) | 734 (985) | 1270 (2800) |
| 6,435 | ||||||||
| 0,388 (0,520) | 815 (1093) | 6,818 | 466 (624) | 621 (833) | 698 (937) |
More from Masson Marine
- Masson Marine MM W2800Y Twin Input Single Output Gearbox
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- Masson Marine EM311
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- 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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