Welcome to Linqing Xinshengdi Bearing Co., Ltd.
804358 Tapered Roller Bearing 80x140x39.25mm Specialized Transmission Series
- Specialized Fractional Dimensions: Specifically engineered with an ultra-precise width of 39.25 mm, making it an exact-fit component for specialized automotive transmissions and heavy-duty differential units.
- Zero-Defect Manual QA: Given the strict tolerance required for its unique width, every 804358 unit is meticulously assembled by hand and individually measured with digital micrometers to ensure absolute dimensional compliance.
- Enhanced Roller Profiling: The tapered rollers are finely profiled to prevent stress concentration at the roller edges, maximizing the bearing's load-carrying capacity and operational lifespan.
- Heavy Thrust Capability: Designed to absorb severe single-direction axial forces generated by helical gears in complex automotive transmission systems.
- Superior Surface Finish: Advanced grinding techniques create a mirror-like finish on the raceways, allowing for silent operation and minimal power loss in high-speed applications.
Parameter Table
| Specification | Technical Details |
| Model Number | 804358 |
| Bearing Type | Single Row Tapered Roller Bearing |
| Inner Diameter (d) | 80.00 mm |
| Outer Diameter (D) | 140.00 mm |
| Total Width (B) | 39.25 mm |
| Material | Top-Tier GCr15 Chrome Steel |
| Application Focus | Transmissions & Gearboxes |
Product Introduction
Introduction
The 804358 Tapered Roller Bearing is a highly specialized automotive and industrial component, instantly recognizable by its distinct fractional width of 39.25 mm. This exact dimension is critical for maintaining the tight clearances required in sophisticated gearboxes and transmission assemblies. Because these bearings are often used to repair or rebuild expensive machinery, there is zero room for error. In our assembly facility, we bypass generic automated assembly in favor of a highly controlled, manual fitting process. Our technicians ensure that the cone, cup, and roller assembly are perfectly matched, guaranteeing that the 804358 provides an immediate, flawless fit for your customers' most demanding mechanical rebuilds.
Applications
Automotive Gearboxes: A critical replacement part for specific heavy-duty manual and automatic vehicle transmissions.
Differential Assemblies: Provides structural support and load management in heavy commercial vehicle rear axles.
Specialized Machinery: Utilized in custom industrial gear reducers that require precise spatial configurations.
Fleet Maintenance: An essential SKU for regional auto parts suppliers servicing large commercial transport fleets.
FAQ
Q: The width is exactly 39.25mm. How do you guarantee this precise fractional dimension?
A: During our manual assembly and final inspection process, we utilize high-precision digital calipers and micrometers to verify the total stand-out width of the assembled cone and cup. Any unit that deviates from the strict 39.25mm tolerance is immediately rejected.
Q: Can you provide laser marking with our internal part numbers instead of just the model number?
A: Yes. We can laser-etch any specific OEM part numbers, client SKUs, or branding directly onto the bearing ring, making it easier for your customers to identify it as an exact replacement part.
Q: Is this bearing pre-lubricated?
A: Standard tapered roller bearings like the 804358 are shipped with a high-grade anti-rust preventative oil, requiring the end-user or mechanic to pack it with the appropriate transmission fluid or bearing grease during installation.
Packaging Customization
We understand that specialized automotive parts require premium presentation. We offer tailored packaging solutions, including individual vacuum-sealed VCI bags to prevent any moisture ingress, placed inside heavy-duty customized brand boxes. For bulk B2B clients, we can design the outer packaging to match your existing aftermarket product lines seamlessly.
Shipping & Delivery
To protect these precision components during international freight, individual boxes are tightly packed into reinforced, double-walled master cartons. These are securely strapped onto ISPM-15 fumigated export pallets. We coordinate closely with global freight forwarders to provide efficient, traceable ocean freight services directly to your warehouse facilities in Russia, South America, or the Middle East.
