Product introduction
The Cummins K19 main bearing, Cummins K38 main bearing, Cummins K50 main bearing, and Cummins K60 main bearing can share parts across different engine models, significantly reducing the complexity and procurement costs of spare parts inventory in the global maintenance network and improving service response efficiency. The cummins 5612318L uses a precision composite process of steel backing and tin-based anti-friction alloy, which has excellent embedding and fatigue resistance. It can effectively accommodate small impurities and avoid crankshaft scratches. Under high speed of 1500–2100 rpm and oil pressure of >15MPa, the friction coefficient is as low as 0.005, ensuring more than 20,000 hours of trouble-free operation.
Product Images
Product Parameters
| Parameter category | Detailed Description |
| Part number | 5612318L |
| Compatible engine series | Cummins K19,K38,K50,K60 |
| Installation location | At the main journal of the crankshaft, it is installed in conjunction with the main bearing bush and the crankshaft housing, totaling 5 to 7 steps |
| Structure type | Multi-layer composite sliding bearing (steel back + anti-friction alloy layer) |
| Material composition | Steel back + lead bronze/tin-based alloy anti-friction layer |
| Work environment | Continuous high temperature (>120°C), high pressure (>15MPa), and high speed (1500-2100 rpm) |
| Lubrication method | Pressure oil supply lubrication directly supplies oil to the bearing clearance through the crankshaft oil passage |
| Carrying capacity | Radial load ≥85 kN, axial load ≥12 kN |
| Support the crankshaft | Ensure that the crankshaft maintains an accurate axis during high-speed rotation to prevent wobbling and vibration. |
Product Advantages
The cummins 5612318L main bearing utilizes a high thermal conductivity steel backing and alloy layer gradient design to achieve efficient heat dissipation, maintaining a stable operating temperature within the 120–140°C range. This ensures stable lubrication and structural integrity even in extreme environments such as high altitudes, high temperatures, and high humidity. It is widely used in high-vibration, high-load applications such as mining machinery, ocean-going vessels, and large power plants. Real-world examples show that the K60 generator set in the Inner Mongolia open-pit mine operated continuously for 18,000 hours without main bearing replacement; and the overhaul cycle of the QSK50 system on the South China Sea oil and gas platform was extended by 50%, reducing annual downtime losses by 42%.
FAQ
Q: 1. Which Cummins engine models are compatible with the 5612318L main bearing?
A：The 5612318L main bearing is a standard component for Cummins' K19, K38, K50, and K60 series engines. It provides support for the crankshaft main journals of these high-power diesel engines, achieving cross-platform compatibility and simplifying global maintenance spare parts management.
Q: 2. Why can the 5612318L bearing guarantee over 20,000 hours of trouble-free operation for K-series engines?
A: It employs a multi-layered composite structure of steel backing and tin-based anti-friction alloy, possessing excellent embedding properties and fatigue resistance. It can stably form a fluid lubrication film at high speeds of 1500–2100 rpm and oil pressures >15MPa, with a friction coefficient as low as 0.005, effectively resisting damage from impurities and thermal deformation.
Q: 3. How to identify genuine 5612318L main bearings?
A:Genuine parts have official Cummins laser-engraved serial numbers, exclusive anti-counterfeiting packaging, and complete supply chain traceability codes. Counterfeit parts lack these markings, and outdated clearances can easily lead to crankshaft seizure, voiding the engine warranty.
Q: 4. Does the 5612318L main bearing support international shipping?
A:Yes, genuine 5612318L main bearings are shipped internationally through Cummins' global authorized distribution network, using shockproof and moisture-proof packaging that meets ISO 9001 quality standards, and can be delivered directly to major ports and service centers worldwide.
Q: 5. Are special customs clearance documents required for international shipping of the 5612318L main bearing?
A:As a core safety component of the engine, shipping requires the original manufacturer's Certificate of Conformity (COA), commercial invoice, and HS code 840991. Some countries may require original manufacturer authorization certificates to prevent the seizure of counterfeit products.
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