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

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

The 387-384ED is a double-row tapered roller bearing with a 2.25″ bore and 3.937″ outer diameter, built from sturdy chrome steel for combined load handling. It supports dynamic radial loads up to 42,200 lbf and operates smoothly in temperatures from -30°C to 110°C.

Its open design allows 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 variations for specific needs.

This model is ideal for industrial gearboxes or heavy machinery where combined radial and thrust loads are common. Its double-row construction provides extra stability for demanding applications.

Weighing 3.11 lb, it’s a robust choice for imperial-sized systems. Compliant with RoHS and REACH standards, it meets safety and environmental requirements.

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Product Parameters

  • Part Number 387-384ED
  • 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 1.562"
  • 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 3.68"
  • Cage Cone Backface Clearance 0.03"
  • Dynamic Radial Load 42200 lbf
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 387
  • Cup Part Number 384ED
  • 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 3.11 lb

Features

How Is 387-384ED Bearing Engineered for Reliability?

387-384ED Bearing features a double-row tapered roller design, providing robust support for 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 the bearing’s lifespan.
Designed for standard radial clearance, it operates efficiently within a temperature range of -30° to 110°C.

Built for Durability: 387-384ED Bearing

387-384ED Bearing is crafted with chrome steel rollers and rings, offering excellent resistance to wear.
Its double-row construction enhances load distribution, making it suitable for heavy-duty applications.
The bearing’s standard radial clearance ensures smooth operation under varying conditions.
With a dynamic radial rating of 10,900 lbf for two rows, it delivers reliable performance over time.

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

387-384ED Bearing withstands temperatures from -30° to 110°C, maintaining performance in demanding environments.
Its chrome steel components resist thermal expansion, ensuring consistent operation.
The tapered roller design efficiently manages heat generation during high-load conditions.
This makes it a dependable choice for applications requiring stability under thermal stress.

Application

Industrial Uses of 387-384ED Bearing
The 387-384ED Bearing is commonly used in heavy machinery, such as construction equipment and mining vehicles, where its double-row design handles combined radial and thrust loads efficiently. Its chrome steel construction ensures durability in demanding environments.

In automotive applications, 387-384ED Bearing supports wheel hubs and differential systems, providing reliable performance under varying load conditions. The inch sizing makes it compatible with many North American vehicle models.

For industrial automation, 387-384ED Bearing is ideal for conveyor systems and robotic arms, where its tapered roller design offers smooth operation. The open seal type allows for easy lubrication, extending its service life.

Where Is 387-384ED Bearing Used?
You’ll often find 387-384ED Bearing in agricultural machinery, like tractors and harvesters, where its robust design withstands heavy loads and rough conditions. The steel cage adds extra strength for long-term use.

In material handling equipment, such as forklifts and cranes, 387-384ED Bearing ensures stable performance under frequent load changes. Its standard radial clearance makes it versatile for various industrial settings.

Built for Heavy-Duty Use: 387-384ED Bearing
The 387-384ED Bearing excels in forestry equipment, like log splitters and sawmills, thanks to its tapered roller design and high dynamic load capacity. Its chrome steel rollers reduce wear over time.

For railway applications, 387-384ED Bearing is used in axle boxes, where its double-row construction handles both radial and axial forces. The ABEC-1 rating ensures consistent performance at moderate speeds.

Automotive vs Aerospace: Applications of 387-384ED Bearing
In automotive systems, 387-384ED Bearing is a go-to for heavy-duty trucks and buses, offering reliable load support. Its inch measurements align with many commercial vehicle standards.

While less common in aerospace, 387-384ED Bearing can be found in ground support equipment, like tow tractors, where its durability and ease of maintenance are valued. The temperature range suits most operational conditions.

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