279-0344 Earthmoving Heavy Tapered Roller Bearing

Extreme Load Rating: Large 290mm bore with robust rolling elements handles massive tonnage and severe shock loads.
Shock Load Resistance: Thorough case-hardening treatment provides a ductile core and extremely tough raceway surface.
Micro-Finished Raceways: Reduces friction and heat buildup during long continuous operations in harsh mining environments.
Exact OEM Specification: Manufactured to precise interchange dimensions for fast replacement on heavy excavators and haul trucks.

Technical Data

Technical Parameter	Metric Value
Inner Bore Diameter (d)	290.00 mm
Outer Diameter (D)	380.00 mm
Total Width (T)	40.00 mm
Precision Standard	ISO P0 / ABEC-1

Product Specifications

Specification	Details
Item Type	Severe-Duty Heavy Machinery Tapered Roller Bearing
Model Number	279-0344
Bearing Design	Single Row Tapered (Large Bore)
Material	Vacuum-Degassed GCr15 Chrome Steel
Cage Material	Reinforced Steel / Brass Cage

Product Introduction

The 279-0344 is an extra-large, severe-duty tapered roller bearing engineered for extreme earthmoving and heavy construction machinery. Featuring massive dimensions of 290 x 380 x 40 mm, this bearing is built to survive high-tonnage dynamic impacts and heavy combined loadings. Manufactured from premium, high-purity GCr15 chromium steel and subjected to advanced case-hardening, the 279-0344 resists raceway surface fatigue, spalling, and shock deformation. It is an indispensable, high-value replacement SKU for B2B heavy equipment parts suppliers and mining fleet maintenance networks worldwide.

Applications

Heavy earthmoving machinery, mining haul trucks, and excavators.
Large construction equipment wheel hubs and final drives.
Heavy industrial crushing plant gearboxes and rock crushers.

FAQ

Q: Is this bearing interchangeable with OEM equipment part number 279-0344?
A: Yes, it is engineered as a direct dimensional and functional replacement for original machinery specifications.
Q: How is this heavy bearing packaged for ocean freight?
A: Each bearing is heavily anti-rust oiled, sealed in thick moisture-barrier VCI plastic, and bolted into individual heavy-duty wooden crates.

OEM & Custom Service

We supply full OEM services including custom laser etching of part numbers, specialized clearance adjustments, and custom wooden crate packaging for heavy machinery spares.

Packing & Delivery

Hermetically sealed in VCI barrier film, packed in custom individual heavy-duty wooden crates, and secured on fumigated export pallets for global shipping.