crank shaft , Iran

The crankshaft is a key mechanical component in internal combustion engines that converts piston linear motion into rotary motion of the output shaft. Crankshafts are typically made of alloy steel with heat treatment and surface annealing to achieve tensile strength of 800–1200 MPa and surface hardness of 55–60 HRC. Length varies from 250 to 600 mm, with main journal diameters of 40–80 mm. Torque capacity ranges from 200 to 1000 Nm. Bearing surfaces are machined with 0.01 mm precision to minimize friction and wear.

Structurally, the crankshaft includes main journals, crankpins, flywheel, and internal oil passages. Bearing seats are precisely machined, and high-pressure oil channels ensure continuous lubrication. Static and dynamic balancing ensures engine vibration under 5 mm/s. Flywheel and crankpin surfaces are hardened and chrome-plated, providing service life above 150,000 km for light engines and 500,000 km for heavy-duty engines. This design guarantees smooth operation, high durability, and optimized power transmission.You can order and buy crank shaft from Iran by contacting us through whatsaap and email.
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