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Advance 120B Marine Gearbox

Oct 24, 2022 | 120 Series, 120 100-500kW | 0 comments

Advance 120B Marine Gearbox

The speed input range of the Advance 120B marine gearbox is 750-1800 RPM, with engine input power from 79.2 kW to 158.4 kW. the center distance is 190 mm, the reduction ratio range is 2.03-3.73, the transmission capacity range is 0.044-0.088 kW/RPM, the rated propeller thrust is 25 KN, and the input shaft is in the train Opposite to the output shaft.

Advance 120B marine gearbox is composed of transmission shaft, output coupling, input coupling, oil pressure gauge, oil Filter, control system, oil pump and other important components.

Advance 120B marine gearboxes provides two types of control system which are push-pull flexible shaft, electric control for customers to choose. To meet the different requirement of coupling with different engine brand and models, Advance 120B marine gearboxes provide different SAE size coupling and housing including SAE 1, flywheel SAE 14 is available……

All of our Advance 120 series marine gearbox can provide CCS classification certificate, some of series can provide international classifications with extra costs which mainly including French BV, British LR, American ABS, Japanese NK , Norway DNV-GL, Russia RS, South Korea KR, Italy RINA and other classification societies.

Advantages Of Advance 120B Marine Gearbox

  • It has the functions of reversing, clutching, and deceleration, and can be matched with various marine diesel engines with equivalent torque to form a unit. Applicable to all kinds of medium and small ships.

  • The gearbox has a compact structure and can be controlled by a variety of control methods. The operation is light and sensitive, and it can be operated from a distance, which is convenient for driving and machine integration.

  • The advanced design makes the connection of the gearbox very soft, easy to maintain, more durable, and has the characteristics of large transmission power, small size and light weight.

  • The toothed elastic input coupling and connection cover can be matched with various flywheels and flywheel shells to connect with the host, easy installation and beautiful appearance

  • With excellent deceleration effect and strong bearing propeller thrust

  • Professional gearbox specialists and after-sales service, spare parts directly available from stock.

Technical Specifications

Genset Model:120B
Input Speed:750-1800 RPM
Power:79.2-158.4 kW @ 2100 RPM
Center Distance:190 mm
Trans.Capacity:0.044-0.088 kW / RPM
Reduction Ratio:2.03 3.73
Rated Thrust:25 kN
Dimension:605 mm * 744 mm * 770 mm
Net Weight:400 kg
Lead Time:15-30 Working Days
Payment Terms:T/T ,L/C

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Input Speed

Trans. Capacity




120B750-1800 r/min0.008 kW/RPM158.4 kW @ 2100 RPM605 mm * 744 mm * 770 mmMechanical
120C1000-2500 r/min0.1 kW/RPM210 kW @ 2100 RPM432 mm * 440 mm * 650 mmMechanical
HCN1201000-2500 r/min0.01 kW/RPM210 kW @ 2500 RPM432 mm * 440 mm * 650 mmMechanical


Technical Specifications of Advance 120B Marine Gearbox

Model120BInput Speed(r/min)750-1800Center Distance(mm)190
Reduction Ratio(i)2.03 2.81Trans.Capacity(kW/rpm)0.088Power(kW)158.4 kW @ 1800 RPM
3.730.04479.2 kW @ 1800 RPM
Rated Thrust(kN)25Dimension(mm)605*744*770Net Weight(kg)400
FlywheelSAE14Bell HousingSAE1ControlsMechanical/Electrical
1. The Marine gearbox has the function of reverse, clutch, deceleration and the thrust of the propeller, which is equipped with the main engine to form the Marine power unit.
2. The “transfer capacity” refers to the ratio of the engine’s rated power to the rated speed, and the reduction ratio corresponds to the transmission capacity, which should be less than the number be offered.
3. The gearbox and engine shafting are not allowed to use rigid connection, and the bracket is recommended to be installed on the same rigid support.If the engine is mounted on the elastic support, and the gearbox is installed on the rigid support, please contact the technical department of the company to select the suitable high elastic coupling.
4. The weight of the gearbox is approximation, for different reduction ratio the weight is different.
5. Due to the technical improvement of the products, the products may change without notice. For any other questions please contact our sales engineer.


NameTransverse DirectionLongitudinal Direction
Marine Gearbox15°22.5°7.5°


Optional Accessories of Advance 120B Medium-Low Duty Marine Gearbox

Bell Housing195CInput Coupling1. Highly Flexible Coupling
/2. Toothed Input Coupling
Direction of Input Shaft Rotation1. Anti-clockwise (Facing the Output End)VDOGearbox Pressure  Visible on Bridge
2. Clockwise (Facing the Output End)
Alarm Device1. TemperatureControl System1. Mechanical
2. Working Pressure2. Electrical
3. Lubricating Oil Pressure3. Pneumatical
Gauge Oil Temperature

Modifiable Components of Advance 120B Medium-Low Duty Marine Gearbox

Special Reduction RatioAccording to Customer’s Special RequirementsReplacement of Imported Bearing1. Stronger Endurance
2. Longer Service Life
3. Higher Limit Speed
PTOPower Take OffOutput Shaft CouplingBased on Customers data to produce

Marine Gearboxs Conventional wearing parts

External discInternal discSealingPiston ring
GasketRubber sealingThrust plateFilter
Coil type filterPackingO ringInput shaft assembly
Transmission shaft assembyOutput shaft assemblyHydraulic control system

Note: All Above Data are Just for Reference, All Data Might Change Without Notices or Updates, Please Contact Our Sales Team to Confirm All Details Via WhatsApp or Email.

The picture of Sale Manual showing the accessories and scopes of supply.

Engine Sale Manual

The picture of Installation Drawing showing the accessories and scopes of supply.

Installation Drawing

The picture of Installation Manual showing the accessories and scopes of supply.

Installation Manual

The picture of Operation Manual showing the accessories and scopes of supply.

Operation Manual

The picture of Engine Parts Catalogue showing the accessories and scopes of supply.

Parts Catalogue

The picture of Test Report and Certifcate showing the accessories and scopes of supply.

Report & Certifcate

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Sales Team

Marine Sales - Mrs. Gazit Wong WhatApp-Icon

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Spare Parts - Mrs. Nora Chen WhatApp-Icon

Sales Manager - Mrs. Wendy Fu

Ventas españolas - Victoria

Sales Director - Mr. Jasper Lee       WhatApp-Icon

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