749/742 RICH | Single Row Tapered Roller Bearing 85.026 x 150.089 x 44.45 mm

Technical Specifications:

• Product Type: Single Row Tapered Roller Bearing
• Model Designation: 749 / 742
• Brand: RICH
• Bore Diameter (d): 85.026 mm
• Outer Diameter (D): 150.089 mm
• Total Width (T): 44.45 mm
• Inner Ring Width (B): 46.672 mm
• Outer Ring Width (C): 36.512 mm
• Rounding Radius (R1/R2): 3.5 mm / 3.3 mm
• Weight: 3.115 kg
• Country of Origin: China

The 749/742 RICH is a heavy-duty single row tapered roller bearing engineered to support massive combined radial and axial loads. With inch-series dimensions of 85.026 mm bore, 150.089 mm outer diameter, and 44.45 mm total width, this bearing is a robust solution for primary industrial and automotive power transmission systems requiring maximum structural stiffness and durability.

The internal geometry is precision-optimized to ensure uniform load distribution across the tapered rollers, significantly reducing frictional torque and heat generation during heavy-torque operations. The separable design — consisting of the cone (inner ring assembly) and the cup (outer ring) — allows for independent installation. This feature is essential for the precise setting of internal clearance or preload, which directly influences the stability and service life of high-performance transmission and axle units.

Manufactured using high-grade steel to resist fatigue and wear, the 749/742 RICH is designed for reliable long-term performance. Its substantial mass (over 3 kg) and large rounding radii (R1/R2) ensure exceptional resistance to deformation and a secure fit on heavy-duty shafts and within housings.

Key Performance Advantages:

• Extreme Load Capacity: Designed to manage simultaneous high radial and thrust forces in one direction.
• Separable Construction: Facilitates easier mounting, inspection, and maintenance of large drivetrain assemblies.
• Precision Roller Geometry: Ensures smooth rotation, energy efficiency, and extended maintenance intervals.
• Structural Rigidity: Built to withstand the extreme stresses found in mining, construction, and heavy industrial machinery.
• RICH Engineering Standard: Manufactured to exacting tolerances to provide a perfect fit for professional aftermarket applications.

Typical Applications:

• Heavy-duty industrial gearboxes and high-torque speed reducers.
• Agricultural machinery final drives and tractor axle assemblies.
• Primary transmission units in construction and earthmoving equipment.
• Commercial vehicle wheel hubs and heavy-duty differential systems.

Transparency Note: This product is manufactured under the RICH brand. All dimensions, model references, and technical data are provided strictly for identification and compatibility purposes and do not imply affiliation, authorization, or endorsement by the referenced manufacturers.