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

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

The 387W-384D is a double-row tapered roller bearing with a 2.25″ bore and 3.937″ outer diameter, built from sturdy chrome steel for long-lasting performance.
It handles combined loads up to 42200 lbf, with a dynamic radial rating of 10900 lbf for two-row operation, making it suitable for heavy-duty applications.
The open design allows for easy lubrication, while the steel cage ensures smooth rotation even under stress. It operates reliably in temperatures from -30°C to 110°C.
This bearing is ideal for industrial machinery, gearboxes, or heavy equipment where high radial and thrust loads are common. Compliant with RoHS and REACH standards, it weighs 3.33 lbs for easy handling.

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Product Parameters

  • Part Number 387W-384D
  • Brand TFL
  • Size 2.25" x 3.937" x 0.864"
  • Bore Dia 2.25"
  • 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 2.6"
  • 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 387W
  • 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 3.33 lb

Features

Performance Features of 387W-384D Bearing

387W-384D Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 42,200 lbf, ensuring reliable performance in heavy-duty applications.

The double-row tapered roller design enhances stability and load distribution.
With a standard radial clearance, it provides smooth operation in various conditions.

387W-384D Bearing operates efficiently within a temperature range of -30° to 110°C.
The steel cage maintains roller alignment, reducing wear and extending service life.

This bearing requires lubrication but is designed for durability in demanding environments.
Its precise tolerances ensure consistent performance across industrial applications.

Application

Industrial Uses of 387W-384D Bearing
387W-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 even in demanding environments.

In automotive applications, 387W-384D Bearing supports wheel hubs and differential systems, providing reliable performance under high stress. Its inch sizing makes it a preferred choice for American and British vehicle models.

For industrial automation, 387W-384D Bearing excels in conveyor systems and robotic arms, where precision and load capacity are key. The open seal design allows for easy lubrication, extending its service life.

Where Is 387W-384D Bearing Used?
387W-384D Bearing finds its place in agricultural machinery, particularly in tractors and harvesters, thanks to its robust tapered roller design. The standard radial clearance ensures smooth operation in varying conditions.

It’s also a go-to choice for wind turbine gearboxes, where its dynamic load rating ensures long-term reliability. The steel cage adds extra strength, making it suitable for high-speed rotations.

Built for Heavy-Duty Use: 387W-384D Bearing
387W-384D Bearing is ideal for railway applications, such as axle boxes, where its combined load capacity and temperature tolerance are crucial. The ABEC-1 rating balances precision and cost-effectiveness.

In marine equipment, 387W-384D Bearing withstands harsh conditions, from saltwater exposure to heavy loads. Its chrome steel rollers resist wear, ensuring consistent performance over time.

Automotive vs Aerospace: Applications of 387W-384D Bearing
In automotive systems, 387W-384D Bearing is trusted for drivetrain components, offering a balance of strength and efficiency. The inch measurements simplify integration into existing designs.

For aerospace ground support equipment, 387W-384D Bearing provides reliable performance in load-handling systems. Its temperature range suits both indoor and outdoor operations.

Q&A

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