High Performance Diesel Engine Crankshaft 3974539 Alloy steel Forged

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Cummins ISDE4.5 Crankshaft 3974539 Alloy steel Forged




1. Supply both genuine parts and OEM parts with good price for   Cummins ISDE4.5 Crankshaft 3974539 Alloy steel Forged


2. Accept small order and MOQ 1PC


3. Short delivery time for 7 days after payment





   Cummins ISDE4.5 Crankshaft 3974539 Alloy steel Forged  used for  

Bus, coach, Pick up truck, trailer,truck, tractor








Farming machine & Mining machine














Competitive Advantage:


Large stock for it & delivery time will be 7 days after payment for   Cummins ISDE4.5 Crankshaft 3974539 Alloy steel Forged



Forging and casting

Crankshafts can be forged from a steel bar usually through roll forging or cast in ductile steel. Today more and more manufacturers tend to favor the use of forged crankshafts due to their lighter weight, more compact dimensions and better inherent damping. With forged crankshafts, vanadium microalloyed steels are mostly used as these steels can be air cooled after reaching high strengths without additional heat treatment, with exception to the surface hardening of the bearing surfaces. The low alloy content also makes the material cheaper than high alloy steels. Carbon steels are also used, but these require additional heat treatment to reach the desired properties. Iron crankshafts are today mostly found in cheaper production engines (such as those found in the Ford Focus diesel engines) where the loads are lower. Some engines also use cast iron crankshafts for low output versions while the more expensive high output version use forged steel.


The shaft is subjected to various forces but generally needs to be analysed in two positions. Firstly, failure may occur at the position of maximum bending; this may be at the centre of the crank or at either end. In such a condition the failure is due to bending and the pressure in the cylinder is maximal. Second, the crank may fail due to twisting, so the conrod needs to be checked for shear at the position of maximal twisting. The pressure at this position is the maximal pressure, but only a fraction of maximal pressure


Related Products

Brand Engine Model  Part Name Parts Number      
      Alloy steel Forged Length(mm) N.W(KG)
 Cummins ISF2.8 Crankshaft 5264231 5263964 543.5 22
 Cummins ISF3.8 Crankshaft 5261376 5257364 678 32
 Cummins 4BT3.9 Crankshaft 3929036   617 32.5
 Cummins 6BT5.9 Crankshaft 3929037 3942581 857 49.5
 Cummins 6BT5.9 Crankshaft 3917320 3901383 967.5 66.5
 Cummins 6LT8.9 Crankshaft 3965010 3971393 968 76.5
 Cummins 6LT8.9 Crankshaft 4989436      
 Cummins ISDE4 Crankshaft 3974539 4943979
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Mr. Dennis Feng
Tel: 86-27-85557477
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Zhonghe Tongda Hubei Mechanical Electrical Equipment Co., Ltd
1-2-1403, Wanjing Guoji, No. 378, Wuhan, Hubei, China (Mainland)
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