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387-384DRB TDO (Two-Row Double-Outer Race) (Imperial)

387-384DRB TDO (Two-Row Double-Outer Race) (Imperial)

The 387-384DRB is a double-row tapered roller bearing with a 2.25″ bore and 4.125″ outer diameter, built from sturdy chrome steel for long-lasting performance. It handles combined loads with a dynamic radial capacity of 42200 lbf and operates smoothly in temperatures from -30°C to 110°C.

Its open design allows for easy lubrication, while the steel cage ensures durability under heavy use. The bearing comes in standard radial clearance but can also be ordered in C3, C4, or C5 options for specific needs.

This model is ideal for industrial machinery or vehicle applications where high radial and thrust loads are common. Its double-row construction provides extra stability and load distribution.

Weighing 3.64 lb, it’s a robust choice for demanding environments. Compliant with RoHS and REACH standards, it meets international safety and environmental requirements.

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Product Parameters

  • Part Number 387-384DRB
  • Brand TFL
  • Size 2.25" x 4.125" x 0.864"
  • Bore Dia 2.25"
  • 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 2.64"
  • 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 387
  • 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 3.64 lb

Features

How Is 387-384DRB Bearing Engineered for Reliability?

387-384DRB 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 various conditions.

What Makes 387-384DRB Bearing Suitable for High-Temperature Applications?

387-384DRB Bearing is built to withstand temperatures from -30° to 110°C, ensuring consistent performance.
Its chrome steel rings and rollers resist thermal expansion, maintaining precision under stress.
The open design allows for effective lubrication, reducing heat buildup.
This makes it ideal for demanding environments where temperature fluctuations are common.

Built for Durability: 387-384DRB Bearing

387-384DRB Bearing’s double-row tapered rollers distribute loads evenly, enhancing longevity.
The chrome steel components resist wear, even under heavy radial and thrust loads.
Its standard radial clearance options (C3/C4/C5) allow for flexibility in different applications.
With a weight of 3.64 lb, it balances strength and manageability.

Application

Industrial Uses of 387-384DRB Bearing
The 387-384DRB 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 effectively.
Its chrome steel construction ensures durability in demanding environments, making it a reliable choice for long-term use.

Where Is 387-384DRB Bearing Used?
You’ll often find the 387-384DRB Bearing in automotive applications like truck wheel hubs, where its tapered roller design provides smooth performance under heavy loads.
The inch sizing makes it compatible with many North American industrial and automotive standards.

Built for Heavy-Duty Use: 387-384DRB Bearing
The 387-384DRB Bearing excels in mining equipment, where its robust construction withstands harsh conditions and high vibration.
Its open design allows for easy lubrication, ensuring consistent performance even in dusty or wet environments.

Automotive vs Aerospace: Applications of 387-384DRB Bearing
In automotive systems, the 387-384DRB Bearing supports heavy loads in axles and differentials, thanks to its tapered roller design.
While not typically used in aerospace, its precision makes it suitable for industrial gearboxes and power transmission systems.

Practical Applications of 387-384DRB Bearing
The 387-384DRB Bearing is ideal for conveyor systems in manufacturing plants, where its double-row construction handles both radial and axial forces.
Its standard radial clearance options provide flexibility for various operational requirements.

Q&A

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