Home / TSD Surface Drive / TSD Surface Drive / BG750

BH450
BH550
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BH660
BH750
BH850
BH1000
BG550
BG600
BG660
BG750
BG850
Integrated Semi-Submerged Propulsion System

Design Advantage

BG Series Surface Drive — Engineering Specifications

Surface-piercing propeller operates at the air-water interface with 35–45% immersion ratio at design speed, eliminating submerged appendage drag and blade cavitation on large high-speed vessel configurations rated above 600HP
Fixed 45-degree transom installation angle engineered for deep-V hull vessels in the 18–30 metre range, covering offshore patrol vessels, naval fast attack craft, and large commercial high-speed vessels
Selectable propeller diameter (700mm or 750mm) enables precise matching of thrust disc area to the vessel's resistance curve across the full 350-600HP power range
High-torque universal ball-cage (CV joint) driveshaft connection rated for 7,000 N·m maximum input torque — engineered for the sustained high-load operating conditions of naval and commercial fleet applications
Propeller blades and shaft: Duplex stainless steel (2205 grade, PREN ≥35), yield strength ≥450 MPa — verified corrosion resistance in continuous offshore seawater environments at temperatures up to 38°C
Drive housing: Marine-grade 316L austenitic stainless steel throughout, rated for offshore seawater exposure with no painted underwater surfaces
Heavy-duty aluminium-indium alloy sacrificial anodes sized for the larger underwater surface area of the BG750 drive unit
Compatible with inboard diesel engines, hybrid electric, and gas turbine powertrains in the 350-600HP range

Performance Advantages

Verified Performance Advantages vs. Conventional Submerged Propellers

Speed advantage: 15–28% higher top speed at equivalent engine power — on a 30-tonne vessel with twin 1,000HP engines, surface drive propulsion typically delivers 10–15 additional knots versus equivalent conventional shafted propeller configuration
Fuel efficiency: 15–30% reduction in fuel consumption at equivalent vessel speed, delivering significant operational cost savings across the high fuel consumption rates typical of 350–600HP engine installations
Maximum displacement capability: Single BG750 unit rated for vessels up to 8.5 tonnes; twin installation covers 20 tonnes; quad-engine configuration supports vessels up to 40 tonnes — covering the full large vessel fast craft spectrum
Naval specification compliance: ABS and CCS certification meets the procurement specifications of naval, coast guard, and government maritime agency contracts worldwide
Cavitation elimination: At sustained speeds above 35 knots — the operational range of vessels in the 350–600HP power class — surface-piercing propulsion completely eliminates the cavitation erosion that limits conventional propeller lifespan
Reduced drivetrain complexity: Elimination of underwater shaft bearings, struts, and shaft seals reduces maintenance intervention points versus equivalent conventional shafted propeller installations on large vessels

Paramater

Specification	BG750
Propeller Diameter	660 / 750
mmEngine Power Range	257-441kW / 350 – 600HP
Installation Angle	45° (BG Series)
Suitable Vessel Weight	2.8-6T (single unit/dual units)
Drive Housing Material	316L Marine-Grade Stainless Steel
Propeller Blade Material	Duplex Stainless Steel (2205 grade)
Overall Dimensions	1528958750mm
Unit Weight	163 KG
Standard Accessories	Universal drive shaft / Oil pot / Oil shortage warning light / Anti-corrosion zinc block
Certification	ABS · CCS · ISO 9001:2015/2016
Warranty	12 months

TSD Surface Drive Certification

TSD surface drive systems are manufactured under ISO 9001:2015/2016 quality management certification and carry dual classification society approval:

ABS (American Bureau of Shipping) — Certificate covers design, development, and manufacture of movable surface drives, fixed surface drives, and marine gearboxes
CCS (China Classification Society) — Recognised in naval, coast guard, and commercial vessel procurement specifications worldwide

Scope of certification: Marine accessory products including movable semi-immersed surface drives, fixed semi-immersed surface drives, and marine gearboxes.

Dimensions（mm） for BG750

A	948.25	C	496.16	E	901.35
B	219.09	D	1387.81	F	958

Product Paramater

Adaptable blade diameter

Adapted power

Input torque

Input RPM

Dimensions

Weight

Adapted ship weight

Standard accessories

BG550

500/550mm

60Hp-200Hp

1600 N.m

2800r/m

1210*750*550mm

95KG

Single machine2.5T
Dual machine 5T

Universal drive shaft/ oil pot/ oil shortage warning light/ anti-corrosion zinc block

BG600

600mm

150Hp-300Hp

2000 N.m

2500r/m

1308*800*600mm

108KG

Single machine 4.5T
Dual machine10T

Universal drive shaft/ oil pot/ oil shortage warning light/ anti-corrosion zinc block

BG660

660mm

250Hp-400Hp

3000 N.m

2200r/m

1418*871*660mm

130KG

Single machine 6T
Dual machine 15T

Universal drive shaft/ rudder angle table/ oil pot/oil shortage alarm lamp/ anti-corrosion zinc block

BG750

660/750mm

350Hp-600Hp

4500 N.m

2000r/m

1528*958*750mm

163KG

Single machine 10T
Dual machine 20T Four machine 40T

Universal drive shaft/ rudder angle table/ oil pot/oil shortage alarm lamp/ anti-corrosion zinc block

BG850

850/800mm

600Hp-1060Hp

7000 N.m

2000r/m

1635*1083*850mm

220KG

Single machine 13T
Dual machine 35T Four machine 80T

Universal drive shaft/ rudder angle table/ oil pot/ oil shortage alarm lamp/ anti-corrosion zinc block

Recommended TF Series Gearbox

LQ85

LQ100

LQ300


	1000-3000
	300-735
	0.35
	1-2.38
	50
	203
	285

Related Installation Cases

Plan Communication

TSD Surface Drive specializes in high-durability surface-piercing propellers and advanced marine surface drive systems specifically designed for high-speed vessels. Once the essential boat parameters are received from clients, TSD Surface Drive's expert engineers conduct comprehensive technical evaluations to assess feasibility and ensure precise fitment. Leveraging state-of-the-art analysis tools and methodologies, they meticulously match the most suitable surface drive systems, ensuring optimal performance, efficiency, and compatibility. Their commitment to innovation and quality guarantees that their products meet the highest industry standards, providing reliable and robust solutions for all high-speed marine applications.

TSD BG600 surface drive coastal patrol tender light commercial vessel

Designing Process

Based on the specific specifications and requirements provided by our clients, TSD Surface Drive's engineers deliver comprehensive and customized solutions to meet customer needs. Our expert team meticulously designs and engineers complete systems, including engines, gearboxes, and surface drives, ensuring seamless integration and optimal performance. Each system can be tailored to match the precise requirements of individual projects, guaranteeing the best possible fit and functionality.

Furthermore, TSD Surface Drive is committed to supporting our clients throughout the entire planning and implementation process. We provide detailed 2D drawings, offering clear and precise visualizations of the proposed systems. This ensures that clients can fully understand the configurations and make informed decisions. Our dedication to quality and precision in every aspect of our production process underscores our commitment to delivering reliable and robust solutions for high-speed marine applications.

Production Processes

After assembling the TSD series surface drive propulsion devices, the company implements rigorous quality control protocols to ensure optimal performance and reliability. This process includes precision laser inspections, as well as static and dynamic balance assessments of the machined blades.
Furthermore, the assembled units undergo specific duration idle tests and dynamic load evaluations. To guarantee durability, the company conducts comprehensive load operation tests on both the device and blades within a specially constructed circulating pool. An essential component of our quality assurance process is the bench joint debugging test of the integrated hydraulic control system, which is critical in validating the reliability and overall quality of our products.

Packing and Transportation

Our TSD surface drive systems are securely packaged in export-grade wooden crates that comply with international shipping standards. We offer flexible transportation options, including sea, air, and land, tailored to your specific needs. If you have any special requirements, please contact us in advance to ensure we can accommodate your request.

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Get In Touch

18th Floor, Tower A, Yuexiang Center, No.8 Songyue Road, Siming District, Xiamen, Fujian

+86-15821908183

+86-0592-5070-133

+86-13950000057

References

GB/T19001-2016/IS09001:2015.

This certificate is valid to the following scope for QMS: ^DESIGN, DEVELOPMENT AND MANUFACTURE OF MARINE ACCESSORY PRODUCTS (MOVABLE SEMIIMMERSED OAR, FIXED SEMI-IMMERSION OAR, GEAR BOX)*.

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