6391/6320 Tapered Roller Bearing Set

Exceptional Load Mastery: Optimized internal geometry ensures superior distribution of combined thrust and radial forces.
Precision Engineering: Manufactured to exact ABEC tolerances for vibration-free, high-speed operation.
Advanced Thermal Treatment: Hardened raceways resist surface fatigue and spalling under extreme operational stress.
Enterprise Quality Assurance: Rigorous physical inspections guarantee flawless cone-to-cup alignment prior to dispatch.

Product Specifications

Specification	Details
Item Type	Tapered Roller Bearing Set
Model Number	6391 / 6320
Bearing Design	Single Row Tapered (Separable Cone + Cup)
Material	Premium GCr15 High-Carbon Chromium Steel
Cage Material	Heavy-Duty Stamped Steel

Product Introduction

The 6391/6320 is a heavy-duty tapered roller bearing engineered to provide uncompromising stability under severe radial and axial loads. Measuring exactly 59.98 x 135.75 x 53.97 mm, this robust component is heavily utilized in commercial vehicle axles and high-torque industrial gearboxes. Manufactured within our state-of-the-art production facility, we enforce rigorous, enterprise-grade quality control protocols. Each cone and cup assembly undergoes meticulous precision validation to ensure flawless raceway contact and optimal load distribution. By prioritizing advanced metallurgy and strict dimensional tolerances, we guarantee our global B2B partners a premium bearing solution that minimizes friction and maximizes mechanical lifespan in the most demanding environments.

Applications

Commercial truck and trailer wheel hubs.
Heavy-duty industrial transmissions and differentials.
Agricultural machinery and mining equipment gearboxes.

Equivalent Models

6391-6320

Cross Reference

Timken: 6391-6320
SKF: 6391/6320

FAQ

Q: Can the cone and cup be replaced independently?
A: For optimal performance and lifespan, it is highly recommended to replace both the 6391 cone and 6320 cup simultaneously as a matched set to prevent uneven wear.
Q: What lubrication is required?
A: This bearing is supplied open and must be thoroughly packed with a high-quality extreme-pressure (EP) grease prior to installation.

OEM & Custom Service

We provide comprehensive B2B customization, including bespoke laser engraving of proprietary part numbers, custom packaging solutions, and specialized clearance configurations to meet exact OEM specifications.

Packing & Delivery

All bearings are treated with high-grade industrial rust inhibitors, sealed in moisture-proof polymer bags, and housed in reinforced corrugated cartons. Bulk orders are securely palletized to ensure pristine condition upon global delivery.