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Advance HCQ502 Marine Gearbox

The speed input range of the Advance HCQ502 marine gearbox is 1000-2300 RPM, with engine input power from 848.4 kW. the center distance is 264 mm, the reduction ratio range is 2.71-2.95 the transmission capacity is 0.404 kW/RPM, the rated propeller thrust is 60 KN, and the input shaft is in the train Opposite to the output shaft.

Advance HCQ502 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 HCQ502 marine gearboxes provides two types of control system which are push-pull flexible shaft and electric control for customers to choose. To meet the different requirement of coupling with different engine brand and models, Advance HCQ502 marine gearboxes available in engine flywheel sizes.

All of our Advance 500/501/502 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 HCQ502 Marine Gearbox

  • Gearbox novel structure, so that its use becomes very reliable. The excellent design makes the gearbox and engine arrangement more soft and smooth.

  • Small size, light weight and good operability. The convenience of use and maintenance is fully considered in the design.

  • With excellent machine performance, good design effectively reduce the noise, reduce the vibration.

  • It can be matched with high-speed diesel engines at home and abroad, and can be arranged in vertical, horizontal and inclination according to the needs of users.

  • Excellent deceleration effect and bearing propeller thrust.

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

Technical Specifications

Gearbox Model:HCQ502
Input Speed:1000-2300 RPM
Power:848.4 kW @ 2100 RPM
Center Distance:264 mm
Trans.Capacity:0.404 kW / RPM
Reduction Ratio:2.71-2.95
Rated Thrust:60 kN
Dimension:742 mm * 856 mm * 980 mm
Net Weight:700 kg
Lead Time:15-30 Working Days
Payment Terms:T/T ,L/C


Coming soon


Input Speed

Reduction Ratio

Trans. Capacity



HCAM5001000~2600 RPM1.35-3.001.35-3.00 kW/RPM852 mm * 950 mm * 901 mmElectrical
HCQ5011000~2300 RPM1.03-2.451.03-2.45 kW/RPM742 mm * 856 mm * 950 mmMechanical/Electrical
HCQ5021000~2300 RPM2.71-2.950.404 kW/RPM742 mm * 856 mm * 980 mmMechanical/Electrical

Technical Specifications of Advance HCQ502 Marine Gearbox

ModelHCQ502Input Speed(r/min)1000-2300Center Distance(mm)264
Reduction Ratio(i)2.71 2.95Trans.Capacity(kW/rpm)0.404Power(kW)848.4 kW @ 2100 RPM
Rated Thrust(kN)60Dimension(mm)742 * 856 * 980Net Weight(kg)700
FlywheelSAE18 16 14Bell HousingSAE0 1 WithoutControlsMechanical/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 HCQ502 Light Duty & High 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 HCQ502 Light Duty & High 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

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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