Advance HCAG7650 Marine Gearbox
The speed input range of the Advance HCAG7650 marine gearbox is 1000–2100 RPM, with engine input power from 1319 kW to 2946.3 kW. The inclined angle is 8°, the reduction ratio range is 1.76–2.96, the transmission capacity range is 1.319–1.403 kW/RPM, and it adopts an 8° inclined output structure for marine matching.
Advance HCAG7650 marine gearbox is composed of transmission shaft, output coupling, input coupling, oil pressure gauge, oil filter, hydraulic control system, cooling oil pump and other core components.
Advance HCAG7650 marine gearbox is equipped with mature hydraulic control system. To meet matching demands for various high-power marine engine brands and models, the Advance HCAG7650 marine gearbox supports multiple engine flywheel sizes for flexible on-board installation.
All our Advance HCAG7650 series marine gearboxes can provide CCS classification certificates. Extra charges apply for international classification society certifications, mainly including French BV, British LR, American ABS, Japanese NK, Norway DNV-GL, Russia RS, South Korea KR, Italy RINA and other mainstream classification societies.
Advantages Of Advance HCAG7650 Marine Gearbox
The HCAG7650 marine gearbox adopts a heavy-duty inclined 8° structural design, delivering exceptional long-term operational reliability for high-power marine vessels. Its optimized transmission layout achieves precise, stable alignment between the gearbox and large-power supporting marine diesel engines.
Though built for heavy load bearing capacity, the streamlined integrated structure balances reasonable overall dimensions and controlled weight, bringing excellent onboard installation adaptability. The full design cycle prioritizes convenient daily operation and straightforward routine maintenance for ship operators.
Boasting premium heavy-load mechanical performance, the refined helical gear structural design effectively suppresses operating noise and dampens intense mechanical vibration during long-distance navigation.
Compatible with all mainstream domestic and imported high-power medium-speed marine diesel engines, the unit features an 8° inclined output configuration to satisfy large commercial vessel layout requirements. It delivers stable, efficient deceleration performance and ultra-robust structural capacity to withstand extreme large propeller thrust loads.
Backed by professional heavy-duty marine gearbox technical engineers and comprehensive global after-sales support network, all common replacement spare parts are kept in warehouse stock for fast delivery and quick on-site service.
Technical Specifications
| Gearbox Model: | HCAG7650 |
| Input Speed: | 1000-2100 RPM |
| Power: | 1319-2946.3 kW |
| Center Distance: | 448 mm |
| Trans.Capacity: | 1.204-1.139 kW / RPM |
| Reduction Ratio: | 1.76-2.96 |
| Rated Thrust: | 135 kN |
| Net Weight: | 1300 kg |
| Lead Time: | 15-30 Working Days |
| Payment Terms: | T/T ,L/C |
Model | Input Speed | Reduction Ratio | Trans. Capacity | Rated Thrust | Net Weight |
| HCAG1090 | 1500-4500 RPM | 1.57-2.90 | 0.0696-0.06 kW/rpm | 16 kN | 106 kg |
| HCAG3050 | 1000-2600 RPM | 1.35-3.00 | 0.4664-0.46 kW/rpm | 50 kN | 570 kg |
| HCAG5050 | 1500-2500 RPM | 2.03-2.96 | 0.6319 kW/rpm | 110 kN | 870 kg |
| HCAG6400 | 1600-2100 RPM | 2.93-3.00 | 1.03 kW/rpm | 110 kN | 1200 kg |
| HCAG7650 | 1000-2100 RPM | 1.76-2.96 | 1.204-1.139 kW/rpm | 135 kN | 1300 kg |
| HCAG9055 | 1000-2100 RPM | 1.97-2.95 | 1.356 kW/rpm | 225 kN | 1570 kg |
| ——END—— | |||||
Technical Specifications of Advance HCAG7650 Marine Gearbox | |||||
| Model | HCAG7650-8° | Power(kW) | 1319-2946.3 | Center Distance(mm) | 448 |
| Input Speed(r/min) | 1000-2100 | Reduction Ratio(i) | 1.76 2.03 2.25 2.46 2.54 2.75 2.96 | Trans. Capacity(kW/rpm) | 1.204 1.152 1.139 |
| Rated Thrust(kN) | 135 | Net Weight(kg) | 1300 | ||
| ——END—— | |||||
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.
ANGLE OF TILT | ||||
| Name | Transverse Direction | Longitudinal Direction | ||
| Heeling | Rolling | Heeling | Rolling | |
| Marine Gearbox | 15° | 22.5° | 5° | 7.5° |
| ——END—— | ||||

coming soon

Marine Gearboxs Conventional Wearing Parts | |||
| External disc | Internal disc | Sealing | Piston ring |
| Gasket | Rubber sealing | Thrust plate | Filter |
| Coil type filter | Packing | O ring | Input shaft assembly |
| Transmission shaft assemby | Output shaft assembly | Hydraulic control system | |
| ——END—— | |||
![]() | DCEC Marine Main Engine | ![]() | DCEC Marine Auxiliary Engine |
| CCEC Marine Main Engine | CCEC Marine Auxiliary Engine | ||
| Deutz Marine Main Engine | Deutz Marine Auxiliary Engine | ||
| Weichai Marine Main Engine | Weichai Marine Auxiliary Engine | ||
![]() | Medium-Low Duty Marine Gearbox | ![]() | PSP Marine Propeller |
| Medium-Heavy Duty Marine Gearbox | FSP Marine Propeller | ||
| Light Duty & High Speed Marine Gearbox | FBP|DSP Marine Propeller | ||
| GW Series Marine Gearbox | ISP Marine Propeller | ||
![]() | DCEC Marine Generator Set | ![]() | CDQY SeaMac Control Lever |
| CCEC Marine Generator Set | CDDY SeaMac Control Lever | ||
| Deutz Marine Generator Set | CJRZ SeaMac Control Lever | ||
| Weichai Marine Generator Set | CDRZ SeaMac Control Lever |
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.

Engine Sale Manual

Installation Drawing

Installation Manual

Operation Manual

Parts Catalogue









