Direct factory connection and authorized global supply chains for trucks, transit buses, and high-horsepower machinery engines.
Established in 2015, Nanning Nazhihui Import & Export Trading Co., Ltd. is situated in Nanning, the picturesque “Green City” of China. Leveraging a strategic close proximity to Southeast Asia, we maintain a superior logistical advantage that ensures seamless air, land, and sea connections to global industrial markets.
We are a distinguished, authorized core distributor of Yuchai Group, offering comprehensive access to their complete powertrain catalogs. Yuchai stands as an absolute titan in the engine sector, manufacturing advanced diesel engines, alternative fuel natural gas engines, and next-generation hybrid range extenders designed to power trucks, marine craft, buses, and gensets.
Additionally, our long-standing partnership as an authorized distributor of FAST transmissions enables us to supply heavy-duty gearbox assemblies and genuine spare parts alongside robust technical support for fleet operators and OEM maintenance teams worldwide.
Internal combustion engines operating under high Peak Firing Pressures (PFP) demand exceptional hydrodynamic lubrication. Our global main bearings are designed to mitigate friction, resist cavitation, and maintain structural integrity under extreme dynamic loads.
Constructed using a high-strength steel backing, a copper-lead intermediate layer, and a micro-thin electroplated Babbitt coating. Perfect for heavy diesel machinery requiring maximum load capacities and fatigue resistance.
Ideal for light-to-medium commercial trucks and highway buses. Delivers highly localized conformability and outstanding anti-corrosion properties against acidic contaminants in low-emission engine oils.
Innovative resin matrices filled with solid lubricants like MoS2. Engineered for hybrid engines, start-stop technology, and boundary lubrication contexts where direct metal-on-metal contact risk is high.
To match strict engineering expectations, our crankshaft main bearings conform to precise structural definitions. Below is a comparative guide on the primary configurations manufactured and distributed worldwide.
| Bearing Material System | Hardness (HV) | Fatigue Rating (MPa) | Main Strengths | Recommended Applications |
|---|---|---|---|---|
| Tri-Metal Copper-Lead-Tin (F780 equivalent) | 90 - 110 | 90 - 100 | Supreme fatigue limit, high thermal dissipation | Heavy-Duty Trucks, Mining Machinery, Gensets |
| Bi-Metal Aluminum-Tin-Silicon (AlSn20Cu) | 40 - 55 | 65 - 75 | Outstanding wear wear-in, corrosion immunity | Urban Passenger Buses, Light Duty Transport |
| PVD Sputtered Overlays (Ceramic/Metal Mix) | >130 | >120 | Ultra-wear resistant, long lifecycle under extreme PFP | Euro VI Engines, Marine Main Engines, Racing |
| Solid-lubricant Polymer Overlay | Varies | 80 - 95 | Mitigates dry start wear, runs without oil film temporarily | Intelligent Start-Stop Hybrids, Extreme Climates |
As heavy-duty truck and construction machinery experts, we supply components matching the stringent geometric standards of major global automotive brands.
In response to global eco-regulations and extreme downsizing trends, engine manufacturers demand advanced components. We follow a strict progressional path ensuring our supplied components meet expectations through 2030:
Migration to complex Copper-Bismuth (CuBi) or specialized Aluminum-Tin composites to fully comply with RoHS and REACH regulations, eliminating dangerous lead contents while preserving high load bearing abilities.
Research into smart main bearings with integrated micro-sensors. These sensors transmit real-time data regarding temperature, oil film health, and alignment stresses to preemptive fleet monitoring consoles.
Deploying laser surface texturing to sculpt micro-reservoirs on the shell. These structural reservoirs trap engine oil, reducing starting torque and preventing early scoring during initial dry-starts.
Shipping precision engine components worldwide demands rigid compliance protocols. We ensure all components are certified according to ISO 9001:2015, IATF 16949, and CE requirements, granting hassle-free customs clearances in strict regulatory ports.
Operating alongside Yuchai Group's prime logistics center, we maintain specialized export teams ready to handle international document verification, customs inspection reports, and secure ocean packaging. We manage key freight lanes leaving Shekou port to deliver parts securely across Southeast Asia, South America, and Europe.
Browse our catalog of genuine heavy parts optimized for Yuchai power systems, Fast gearboxes, and Sinotruk mechanical builds.
100% Y&C-compatible parts for YC6K12 diesel engine. Covers alloy cylinder block, cylinder head, piston-rod assembly.
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Compatible with SINOTRUK HOWO, Shacman, FOTON, and Dongfeng trucks. OEM quality sync rings and gear assemblies.
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Covers HOWO T7H, HOWO T5G, and SITRAK C7H gears. Fits WD615 & MC11/13 series engines seamlessly.
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Full overhaul spare component kit including cylinder liners, gasket kits, and heavy main bearings.
Get QuoteFind expert answers to common technical queries regarding engine crankshaft bearings, material specifications, and global sourcing solutions.
Tri-metal bearings feature three distinct layers (steel back, copper-lead base, and a babbitt electroplated coating), which yields outstanding fatigue resistance (up to 100 MPa) under heavy load pressures. Bi-metal bearings, composed of an aluminum-tin compound on steel backing, are lead-free and highly resistant to chemical corrosion, making them suitable for moderate passenger transit and highway transport setups.
As an authorized distributor of Yuchai Group and FAST transmissions, we source components directly from manufacturer assembly yards. All packages arrive with genuine factory barcodes, serial tracker seals, and physical origin certification papers to guarantee total quality control.
Typical causes include lubrication starvation (insufficient oil film), particles scratching the hydrodynamic channels, wrong clearance sizing during assembly, or structural fatigue under excessive peak cylinder pressures. Premium bearing designs mitigate these issues through superior overlay conformability and built-in particle embeddability properties.
Yes. Our modern aluminum-tin main bearings and specialized copper-bismuth replacements fully adhere to strict EU RoHS and REACH mandates. This enables safe distribution and operational compliance in green transport fleets.
Operating near Shenzhen Shekou port and adjacent borders in Southeast Asia allows us to offer swift customs clearance and transport setup. Delivery times range from 7 to 15 days via air freight, while sea voyages take 20 to 40 days depending on the final port destination.
Ensuring high longevity and robust operational stability for transit vehicle parts, engines, and heavy chassis components.
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