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

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

The 389A-384D is a two-row tapered roller bearing with a 2.125″ bore and 3.937″ outer diameter, built from sturdy chrome steel for long-lasting performance. It handles combined loads with a dynamic radial capacity of 42,200 lbf and operates smoothly in temperatures from -30°C to 110°C.

Its double-row design distributes loads evenly, while the open construction allows for easy lubrication. The steel cage ensures durability, making it suitable for heavy-duty applications.

This bearing is ideal for industrial machinery or automotive systems where high radial and thrust loads are common. It comes in standard radial clearance but can also be ordered in C3, C4, or C5 options for specific needs.

Weighing 3.52 lb, it’s a robust choice for demanding environments. Compliant with RoHS and REACH standards, it meets ABEC-1 precision requirements for reliable performance.

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Product Parameters

  • Part Number 389A-384D
  • Brand TFL
  • Size 2.125" x 3.937" x 0.864"
  • Bore Dia 2.125"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 3.937"
  • Outer Dia Tolerance +0.001" to 0
  • Double Cup Width 1.6875"
  • 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 2.0624"
  • 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 3.68"
  • Cage Cone Backface Clearance 0.03"
  • Dynamic Radial Load 42200 lbf
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 389A
  • Cup Part Number 384D
  • 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 3.52 lb

Features

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

389A-384D Bearing features a double-row tapered roller design, providing strong resistance to combined radial and thrust 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 operational life.
With a temperature range of -30° to 110°C, it performs reliably in varied conditions.

389A-384D Bearing’s standard radial clearance options offer flexibility for different applications.
Its open design simplifies lubrication, ensuring smooth operation over time.

Application

Industrial Uses of 389A-384D Bearing
389A-384D Bearing is commonly used in heavy machinery, such as construction equipment and mining tools, where its double-row design handles combined radial and thrust loads effectively. The chrome steel construction ensures durability in demanding environments.

Where Is 389A-384D Bearing Used?
You’ll find 389A-384D Bearing in automotive applications like truck wheel hubs, where its tapered roller design provides stability under heavy loads. The inch sizing makes it a good fit for North American vehicle standards.

Built for Heavy-Duty Use: 389A-384D Bearing
389A-384D Bearing excels in industrial gearboxes, offering reliable performance even under high stress. Its open design allows for easy lubrication, extending service life in continuous operation.

Automotive vs Aerospace: Applications of 389A-384D Bearing
In automotive settings, 389A-384D Bearing supports axle systems, while in aerospace, it’s used in landing gear mechanisms. The standard radial clearance ensures smooth operation in both scenarios.

Key Fields for 389A-384D Bearing
389A-384D Bearing is ideal for agricultural machinery, such as tractors and harvesters, where its robust design withstands dirt and debris. The steel cage adds extra resilience in harsh conditions.

Q&A

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