Camshafts - Main Engine and Propulsion

Marine engine camshafts synchronize fuel injection and valve or exhaust-valve actuation with crankshaft rotation. They are precision-engineered, engine-specific components used mainly in mechanically controlled two-stroke and four-stroke propulsion engines.

ProShipWorks provides end-to-end support to source and supply Camshafts for marine vessels, ship operators, industrial facilities, maintenance teams and procurement departments.

Last updated: October 11, 2026

Product Information

Product Name	Camshafts
Product Category	Main Engine and Propulsion
Product Reference	317
Brands / Manufacturers	MAN B&W, WinGD, Wärtsilä
Unit of Measure	Piece or Assembly

Key Features

Key Feature
1. Precision-machined cam profiles for accurate engine timing
2. Manufactured from forged or cast alloy steel according to engine design
3. Hardened working surfaces provide wear and fatigue resistance
4. Available as one-piece or sectional camshaft assemblies
5. Engine-specific journals, couplings, cams and drive arrangements

Applications of Camshafts

Application
1. Fuel injection and exhaust-valve actuation in low-speed two-stroke main engines
2. Inlet valve, exhaust valve and fuel-pump actuation in medium-speed four-stroke engines
3. Replacement or overhaul of propulsion-engine timing systems

Models & Manufacturers

Model	Manufacturer
MAN B&W S50MC-C series camshaft	Everllence
Sulzer RTA series camshaft	WinGD
Wärtsilä 46 series camshaft	Wärtsilä

Technical Specifications

Model	Specification	Value	Unit
MAN B&W S50MC-C series camshaft	Engine type	Mechanically controlled low-speed two-stroke	—
MAN B&W S50MC-C series camshaft	Typical construction	Sectional camshaft with engine-specific fuel and exhaust cams	—
Sulzer RTA series camshaft	Engine type	Mechanically controlled low-speed two-stroke	—
Sulzer RTA series camshaft	Primary function	Fuel-pump and exhaust-valve timing	—
Wärtsilä 46 series camshaft	Engine type	Medium-speed four-stroke	—
Wärtsilä 46 series camshaft	Primary function	Valve-gear and fuel-injection-pump actuation	—

Standards, Certifications & Class Approval

Review the available standards and approval information relevant to the product. Actual certification, material traceability, inspection and classification requirements depend on the product type, intended application and purchasing specification.

Applicable Standards & Certification	Manufacture and inspection normally follow the engine OEM drawing, material specification and approved quality plan. Applicable controls may include class-approved material certification, dimensional inspection, hardness testing and magnetic-particle or ultrasonic examination under recognized ISO procedures.
Class Approval	Camshafts may be manufactured or repaired under the approved engine design and survey requirements of DNV, ABS, Lloyd's Register, Bureau Veritas or ClassNK. Acceptance is engine-, vessel- and repair-specific; a camshaft is not universally class-approved as a standalone item.

Installation, Maintenance & Safety Information

Installation Notes	Confirm the exact engine type, camshaft section marks and OEM part numbers. Check journals, bearings, couplings, timing marks, backlash, clearances and fastener tightening values against the engine manual. Verify injection and valve timing after installation.
Maintenance Tips	Inspect cam lobes, rollers, journals and bearings for pitting, scoring, cracks and abnormal wear. Verify lubrication flow, timing, clearances and coupling security. Record wear measurements and perform OEM-specified nondestructive testing during major overhauls.
Safety Notes	Isolate starting air, fuel, electrical power and turning gear controls before work. Secure the crankshaft against unintended movement and use certified lifting equipment. Camshaft sections are heavy precision components; protect machined surfaces and follow OEM lifting procedures.