Masson Marine Equipment
MM W20500 NR
Masson Marine MM W20500 NR non-reversing marine gearbox, up to 2.527 kW/rpm and 3,766 kW (5,051 hp) input, ratios from 2.661, dry weight 5,800 kg.
Description
The MM W20500 NR is a marine reduction gearbox from Masson Marine's W range, built for continuous duty in workboat and dredger applications.
Key features
- Reverse reduction marine transmission with 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
- Suitable for twin installation with 100% rated power ahead and astern
- Robust design with easy onboard maintenance; fully works-tested and simple to install
- Design, manufacture and quality control to ISO standards
Technical data
- Non-reversing version
- Rating: 2.527 kW/rpm (3.389 hp/rpm) for ratios 2.661–4.085, decreasing at higher ratios (e.g. 2.127 kW/rpm at 4.849, 1.086 kW/rpm at 9.496)
- Maximum rated input: 3,766 kW (5,051 hp) at 1,490 rpm
- Ratios: from 2.661 up to 10.767
- Sample capacity (2.527 kW/rpm): 2,527 kW (3,389 hp) at 1,000 rpm, 3,032 kW (4,067 hp) at 1,200 rpm
- Dry weight: 5,800 kg (12,790 lb)
Standard equipment
- Oil cooler with fittings and flexible hoses
- Integrated brackets
- Free standing
- Lube oil pump
Options
- Engine-matched torsional coupling
- Propeller shaft flange and coupling bolt set
- Classification by all major classification societies on request
- 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 W20500 | 2,527 (3,389) | 3766 (5051) | 1490 | 2,661 | 2527 (3389) | 3032 (4067) | (-) | 5800 (12790) |
| 3,029 | ||||||||
| 3,613 | ||||||||
| 4,085 | ||||||||
| 2,127 (2,852) | 3510 (4706) | 1650 | 4,849 | 2127 (2852) | 2552 (3423) | 3403 (4564) | ||
| 1,790 (2,400) | 2954 (3961) | 5,757 | 1790 (2400) | 2148 (2881) | 2864 (3841) | |||
| 1,729 (2,319) | 2853 (3826) | 5,959 | 1729 (2319) | 2075 (2782) | 2766 (3710) | |||
| 1,560 (2,092) | 2574 (3452) | 6,610 | 1560 (2092) | 1872 (2510) | 2496 (3347) | |||
| 1,404 (1,883) | 2317 (3107) | 7,345 | 1404 (1883) | 1685 (2259) | 2246 (3012) | |||
| 1,260 (1,690) | 2079 (2788) | 8,184 | 1260 (1690) | 1512 (2028) | 2016 (2704) | |||
| 1,170 (1,569) | 1931 (2589) | 8,810 | 1170 (1569) | 1404 (1883) | 1872 (2510) | |||
| 1,086 (1,456) | 1792 (2403) | 9,496 | 1086 (1456) | 1303 (1748) | 1738 (2330) | |||
| 1,170 (1,569) | 1931 (2589) | 9,989 | 1170 (1569) | 1404 (1883) | 1872 (2510) | |||
| 1,206 (1,617) | 1990 (2668) | 10,251 | 1206 (1617) | 1447 (1941) | 1930 (2588) | |||
| 1,086 (1,456) | 1792 (2403) | 10,767 | 1086 (1456) | 1303 (1748) | 1738 (2330) | |||
| 1,120 (1,502) | 1848 (2478) | 11,036 | 1120 (1502) | 1344 (1802) | 1792 (2403) | |||
| 1,039 (1,393) | 1714 (2299) | 11,895 | 1039 (1393) | 1247 (1672) | 1662 (2229) |
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- Masson Marine MM W2800Y Twin Input Single Output Gearbox
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- Masson Marine Dual Speed Gearboxes (W3300 DS, W3450 DS, W5200 DS)
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