Generator Spare Parts KTA38 Main Bearing Standard Size AR12250 Crankshaft Bearing

Desc.

Crankshaft Bearing

Part No

AR12250

Brand Name

Cummins, Detroit, DCEC, CCEC, XCEC etc.

Other parts

pls contact freely if you need other P/N

Engine Type

Diesel engine, Gas engine, Diesel Generator, Marine engine, Construction engine, Pump engine etc.

Spare Type

Wearing spare parts, maintenance tools, repair kit, upper and lower engine gasket kit.

Condition:

Original and brand new

Applicatble industriy

Retail, marine engines, Construction works, Energy & Mining etc

Key Word:

Original spare parts and engine repair tool kits

Trade terms

FOB EXW CIF DDU DDP, Door to door is available in some countries.

Delivery time:

Most parts are in stock,bulk order based on qty

Payment

T/T, L/C, D/A, Alipay, Western Union, Paypal etc.

Place of origin

China/USA/Japan/Austria/Mexico

Package

Neutral or original packaging

About the product

Supporting and protecting the journal: The main function of crankshaft bearings is to support the journal, reducing friction and wear. They protect the shaft neck and bearing hole by withstanding alternating loads and high-speed friction, thereby extending the service life of the machinery.

Conversion of power: The crankshaft bearing converts the gas force transmitted by the piston connecting rod group into torque, outputs power externally, and drives the engine's valve train and other auxiliary devices.

Lubrication function: In high-speed motion systems, crankshaft bearings require precise control of lubricant to act on rolling elements and raceways, avoiding lubricant overflow and protecting fragile components such as rolling element retainers from external damage.

Reduce friction and wear: Through oil film lubrication, crankshaft bearings can reduce friction coefficient, lower wear, and protect bearing shells and journals from damage.

The working principle of crankshaft bearings: The crankshaft bearings and shaft necks together form a high-speed motion system that can withstand constantly changing impact loads. Due to the extremely fast movement speed, the gap between the bearing and the journal must rely on oil film lubrication, which not only reduces the friction coefficient but also reduces wear. But the viscosity of this oil film needs to be moderate, while also having a certain degree of stiffness to prevent rapid extrusion under high impact loads, which may cause boundary friction or dry friction, and thus cause wear or damage to the bearing and journal.

Related technical parameters and maintenance requirements: Due to the need for crankshaft bearings to withstand alternating loads and high-speed friction, the material must have sufficient fatigue strength, low friction, wear resistance, and corrosion resistance. In order to ensure that the oil film has sufficient rigidity, strong lubrication must be used to ensure that the bearing shell and journal do not come into direct contact under all working conditions.