Crankshaft System

Assembly

Detroit Diesel Engine.jpg · Commons ↗ Report photo

Forged crankshaft with integral counterweights, main bearings and propeller coupling flange.

Direct parts	8
Total parts	45
Used in	1 assembly
Class	Assembly

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Forged crankshaft with integral counterweights, main bearings and propeller coupling flange. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Crankshaft System parts and their functions

8 top-level parts · 45 parts in total · full bill of materials below

Crankshaft System parts diagram: 1 crankshaft, 2 main bearing, 3 connecting rod, 4 piston, 5 piston ring, 6 piston pin, 7 flywheel, 8 coupling flange. 45 parts in 8 top-level items. — Crankshaft System parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.

#	Part	Qty	What it does
1	Crankshaft	1×	Forged alloy steel shaft with throws for each piston and integral counterweights.
2	Main Bearing	6×	White-metal or polymer-lined bearing supporting the crankshaft on the block.
3	Connecting Rod	6×	Drop-forged alloy steel converting piston linear motion to crankshaft rotation.
4	Piston	6×	Aluminium-alloy crown, iron skirt, sealed by [[marine-diesel-engine-piston-ring]].
5	Piston Ring	18×	compression and oil control
6	Piston Pin	6×	Steel wrist pin pivoting the connecting rod on the piston.
7	Flywheel	1×	Large cast-iron wheel storing rotational energy and smoothing torque ripple.
8	Coupling Flange	1×	Steel plate integral to the crankshaft aft end, coupling to the gearbox input.

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Build & assembly graph

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Bill of materials for Crankshaft System

8 top-level lines · 8 rows shown · 45 parts total · indented to 3 levels

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Crankshaft	marine-diesel-engine-crankshaft	1×	1	·	part
2	Main Bearing	marine-diesel-engine-main-bearing	6×	6	·	part
3	Connecting Rod	marine-diesel-engine-connecting-rod	6×	6	·	part
4	Piston	marine-diesel-engine-piston	6×	6	·	part
5	Piston Ring	marine-diesel-engine-piston-ring	18×	18	·	part
6	Piston Pin	marine-diesel-engine-piston-pin	6×	6	·	part
7	Flywheel	marine-diesel-engine-flywheel	1×	1	·	part
8	Coupling Flange	marine-diesel-engine-coupling-flange	1×	1	·	part

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Where the crankshaft system is used

1 product across 1 domain contain it, directly or inside a sub-assembly

Marine 1 Marine Diesel Engine

Used in 1 assembly

Marine Diesel Engine

Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $500–$50k. How estimates work

Vendor	HQ	Specialty	MOQ	Lead time
🇨🇳Weichai Power weichai.com ↗	Weifang, CN	Diesel & power engines	50 units	12–16 wks
🇮🇳Cummins India cumminsindia.com ↗	Pune, IN	Diesel engines	50 units	12–16 wks
🇨🇳Yuchai yuchai.com ↗	Yulin, CN	Diesel engines	50 units	12–16 wks
🇮🇳Kirloskar Oil Engines koel.co.in ↗	Pune, IN	Diesel & gas engines	50 units	12–16 wks
🇮🇳Ashok Leyland ashokleyland.com ↗	Chennai, IN	Engines & commercial vehicles	50 units	12–16 wks