MA142 Marine Gearbox
See larger image: MA142 Marine Gearbox
Product Details
Features of Marine gearbox series MA:
1. The hydraulic system built in the gearbox makes the operation easy from the bridge with remote control. A unit of pressure delay stepping up is fitted in the hydraulic control system and the cluth is smooth in engagement and thorough in disengagement.
2. Two sets of multiplate clutches are mounted at the output end and easy to dis- and re-assemble and mainenance.
3. The housing is integral to ensure its rigidity and the precision for engaging.
4. Both ahead and astern are identical in reduction ratios and can transmit the rated power, especially suitable for boats equipped with twin-engines, which have the same rotation, and twin-propellers.
5. The emergency set is provided to ensure the boat travelling continuously in case of severe hydraulic failure.
6. Bell housing and flexible input coupling are connected with the engine so as to be looked-perfectly the whole unit and easily in mounting.
7. The rage of the speed reduction ratios is wider as follows. Users can choose the ratio suitable to transmission capacity in accordance with the data of the engine or the boat.
Speed Reduction Ratios for Marine Gearbox MA142
Model | MA142 | |||||||
Nominal Ratio | 2:1 | 2.5:1 | 3:1 | 3.5:1 | 4:1 | 4.5:1 | 5:1 | 5.5:1 |
Actual Ratio | 1.97:1 | 1.52:1 | 3.03:1 | 3.54:1 | 3.95:1 | 4.5:1 | 5.06:1 | 5.47:1 |
Technical Data:
Descriptions | Model | MA142 |
Technical Parameters and Specifications | ||
Transmission | 3 shafts with 5 helical gears | |
Center Distance (mm) | 142 | |
Rated Input Speed (r/min) | 1500~2500 | |
Ratio and Transmission Capacity (detail as Fig.1) | ||
Rated Propeller Thrust (N) | 8500 | |
Permissible Inclination Angle | 10°longitudinally 15°transversely | |
Control Type | hydraulic control | |
Time for Reversing (s) | ≤10 | |
Rotational Direction of Input Shaft (face to the output end foreward) | counter-clockwise | |
Rotational Direction of Output at Ahead Position (face to the output end foreward) | clockwise | |
Hydraulic Pressure (MPa) | 1-1.3 | |
Initial Oil Pressure (Mpa) | 0.15-0.4 | |
Max. Oil Temp. (°C) | ≤80 | |
Flow of Cooling Water (L/min) (inlet water temp. ≤30°C) | ~35 | |
Oil Grade | SD/CC30, SAE30; SD/CC40, SAE40 (for summer use in tropical areas) | |
Oil Capacity (L) | ~5.8 | |
Type of Connected with Engine | elastic coupling | |
Overhaul (bearing lifetime) (h) | 6000 | |
Overall Dimensions (L×W×H) | 367×560×540 | |
Net Weight (kg) | ~130 | |
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