CRANKSHAFT
Daihatsu, Yanmar, MAK, Bergen and Other Marine Engine
Refurbished
The crankshaft is one of the most critical components in any marine diesel engine. It converts the reciprocating motion of pistons and connecting rods into rotational motion that drives the propeller shaft and ultimately propels the vessel. Without a properly functioning crankshaft, a marine engine cannot deliver power efficiently or safely.
Modern merchant vessels rely heavily on robust crankshaft designs capable of withstanding enormous combustion forces, continuous operation, and demanding marine environments. Whether installed in low-speed two-stroke propulsion engines or medium-speed auxiliary engines, crankshafts play a central role in engine reliability, fuel efficiency, and operational safety.
For shipowners, fleet managers, technical superintendents, and marine engineers, maintaining crankshaft integrity is essential for minimizing downtime, avoiding catastrophic engine failures, and ensuring compliance with classification society requirements.
SM MARINE SERVICE™ supplies crankshafts, crankshaft spare parts, repair services, inspection support, and technical solutions for a wide range of marine engine brands operating worldwide.
A marine engine crankshaft is a precision-engineered forged steel component designed to transfer power from the pistons to the propulsion system. It operates under extremely high mechanical and thermal loads and must maintain precise alignment and dimensional stability throughout its service life.
Marine crankshafts are commonly installed in:
Different engine manufacturers utilize unique crankshaft designs, journal dimensions, balancing arrangements, and bearing configurations. However, all crankshafts perform the same essential function of converting piston force into rotational torque.
SM MARINE SERVICE™ supports sourcing and supply of complete crankshafts, crankshaft sections, crank pins, journals, bearing surfaces, and associated engine components.
MAN B&W low-speed engines such as S35MC, S50MC-C, S60MC-C, S70MC-C, S80MC-C, MC-C, and ME series engines are widely used aboard container vessels, tankers, and bulk carriers. Their crankshafts are renowned for high strength, long service life, and excellent fatigue resistance.
Sulzer and WinGD engines utilize heavy-duty forged crankshafts designed for high-output propulsion systems. These crankshafts are commonly found on large tanker fleets and bulk carriers worldwide.
Wärtsilä crankshafts are engineered for medium-speed and low-speed marine applications. They offer excellent durability and are supported by extensive maintenance programs across global fleets.
These manufacturers supply marine propulsion and auxiliary engines used on merchant vessels, offshore platforms, fishing vessels, and coastal fleets. Their crankshafts are designed for reliable operation and efficient maintenance support.
Marine crankshafts are manufactured from forged alloy steel capable of handling continuous cyclic loading and combustion forces over long operational periods.
Journal surfaces, crank pins, and bearing contact areas are machined to extremely tight tolerances, ensuring smooth operation and reduced bearing wear.
Proper balancing reduces vibration, minimizes stress concentrations, and extends engine component life.
Modern marine crankshafts are designed for decades of operation when maintained according to manufacturer recommendations.
Crankshafts are available for low-speed propulsion engines, medium-speed engines, generator engines, and auxiliary power units.
| Parameter | Typical Specification |
|---|---|
| Component Type | Marine Engine Crankshaft |
| Material | Forged Alloy Steel |
| Engine Type | Two-Stroke & Four-Stroke |
| Application | Main Engine & Auxiliary Engine |
| Operating Environment | Marine Engine Room |
| Journal Type | Main Journal & Crank Pin |
| Maintenance Requirement | Regular Inspection |
| Service Life | Long-Term Heavy Duty Operation |
| Compatibility | MAN, Sulzer, Wärtsilä, Hyundai, Mitsubishi, Daihatsu, Yanmar, Mak, Bergen |
Marine engine crankshafts are widely used in:
Providing reliable propulsion for long-distance international trade routes.
Supporting continuous operation under varying cargo loads.
Delivering dependable propulsion in critical cargo transportation operations.
Operating within highly regulated and safety-sensitive environments.
Ensuring reliable engine performance during dynamic positioning and offshore support activities.
Supporting uninterrupted propulsion and onboard power generation.
Providing precise and dependable power for scientific missions.
Maintaining operational efficiency during extended fishing campaigns.
Marine crankshafts operate alongside numerous shipboard systems including radar, ECDIS, AIS, gyro compass, autopilot, GPS, VDR, BNWAS, satellite compass, GMDSS, engine monitoring systems, power management systems, boiler control systems, and marine automation platforms.
SM MARINE SERVICE™ supplies a wide range of marine engine crankshaft-related spare parts, including:
New, Used, and Reconditioned spare parts are available depending on vessel requirements and budget.
SM MARINE SERVICE™ provides comprehensive technical support for marine crankshaft systems, including:
Our engineering team assists ship operators in maintaining reliable engine performance while reducing maintenance costs and downtime.
SM MARINE SERVICE™
Bangladesh Office
Samir Market, DT Road, Pahartali, Beside CDA Market, Chattogram, Bangladesh
China Warehouse and Support Center
Shanghai, China
SM MARINE SERVICE™ supplies both New Equipment and Reconditioned Equipment depending on customer requirements and budget.
We provide worldwide supply, sourcing, repair, calibration, technical support and spare parts services for marine automation, navigation, communication and marine electronic systems.
Website : https://www.smmarineservice.com
Email : info@smmarineservice.com
WhatsApp and Viber : +8801818929292
Marketing Contact: Nazmul Hasan Bhuiyan
Mobile WhatsApp and Viber : +8801730296909
Marine engine crankshafts are among the most important components in any propulsion or auxiliary engine system. Whether operating MAN B&W, Sulzer, Wärtsilä, Hyundai, Mitsubishi, Daihatsu, Yanmar, Mak, Bergen, Caterpillar, or other marine engines, reliable crankshaft performance is essential for vessel safety and operational efficiency.
SM MARINE SERVICE™ offers worldwide support for marine engine crankshafts, spare parts, repair services, technical assistance, reconditioned equipment, and engine overhaul requirements. Shipowners, fleet managers, shipyards, and marine engineers can contact SM MARINE SERVICE™ for dependable marine engine solutions, spare parts sourcing, and professional technical support worldwide.
0
BDT 0
BDT 0
BDT 0
BDT 0
Marine Equipment Supplier