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389A-384DRB TDO (Two-Row Double-Outer Race) (Imperial)

389A-384DRB TDO (Two-Row Double-Outer Race) (Imperial)

The 389A-384DRB is a double-row tapered roller bearing with a 2.125″ bore and 4.125″ outer diameter, built from sturdy chrome steel. It handles combined loads up to 42200 lbf and is designed for long-lasting performance in tough conditions.

Its open design allows for easy lubrication, while the steel cage ensures smooth operation. The bearing works well in temperatures ranging from -30°C to 110°C, making it versatile for various environments.

This model is part of the 385 series and comes with standard cups for easy installation. Ideal for heavy-duty applications like industrial gearboxes or axle systems where combined loads are common.

Weighing 3.85 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it’s a reliable choice for replacements or new installations.

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Product Parameters

  • Part Number 389A-384DRB
  • Brand TFL
  • Size 2.125" x 4.125" x 0.864"
  • Bore Dia 2.125"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 4.125"
  • Outer Dia Tolerance +0.001" to 0
  • Double Cup Width 1.562"
  • Double Cup Width Tolerance +0.003" to -0.01
  • Cone Width 0.864"
  • Cone Width Tolerance +0.002" to -0.01
  • Bearing Width Across Cups 1.9369"
  • Bearing Width Across Cups Tolerance +0.008" to 0
  • Cup Backface ToClear Radius 0.03"
  • Cone Backface Backing Diameter 2.4"
  • Cup Frontface Backing Diameter 3.74"
  • Cage Cone Backface Clearance 0.03"
  • Dynamic Radial Load 42200 lbf
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 389A
  • Cup Part Number 384DRB
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Double Row
  • Seal Type Open
  • Cups Type Standard
  • Series 385
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Rating(One Row 90 Million Revolutions) 6280 lbf
  • Dynamic Thrust Rating(90 Million Revolutions) 3810 lbf
  • Dynamic Radial Rating(Two Row 90 Million Revolutions) 10900 lbf
  • Lubrication Required
  • Temperature Range -30° to 110 °C
  • ABEC Rating ABEC-1
  • Radial Clearance Standard (Available in C3/C4/C5)
  • RoHS Compliant
  • REACH Compliant
  • Weight 3.85 lb

Features

How Is 389A-384DRB Bearing Engineered for Reliability?

389A-384DRB Bearing features a double-row tapered roller design, providing strong resistance to combined loads.
Its chrome steel construction ensures durability, with a dynamic radial load capacity of 42,200 lbf.

The steel cage maintains roller alignment, reducing friction and extending service life.
With a temperature range of -30° to 110°C, it performs reliably in various conditions.

389A-384DRB Bearing’s standard radial clearance allows for smooth operation in diverse applications.
Its open design simplifies lubrication, ensuring consistent performance over time.

Application

Industrial Uses of 389A-384DRB Bearing
The 389A-384DRB Bearing is commonly used in heavy machinery, such as construction equipment and agricultural vehicles, where its double-row design handles combined radial and thrust loads efficiently. Its chrome steel construction ensures durability in tough working conditions.

Where Is 389A-384DRB Bearing Used?
You’ll often find the 389A-384DRB Bearing in industrial gearboxes and conveyor systems, thanks to its ability to manage high dynamic radial loads. The open seal design allows for easy lubrication, extending its service life.

Built for Heavy-Duty Use: 389A-384DRB Bearing
This bearing is a reliable choice for mining equipment, where its tapered roller design provides stability under extreme loads. The standard radial clearance makes it versatile for various applications.

Automotive vs Aerospace: Applications of 389A-384DRB Bearing
In automotive applications, the 389A-384DRB Bearing supports wheel hubs and differentials, while in aerospace, it’s used in landing gear systems. Its inch sizing ensures compatibility with imperial measurement standards.

Practical Applications of 389A-384DRB Bearing
For agricultural machinery like tractors, the 389A-384DRB Bearing offers robust performance in dusty environments. The steel cage adds extra strength, making it suitable for high-vibration scenarios.

Q&A

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