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

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

The 387A-384ED is a two-row tapered roller bearing with a 2.25″ bore and 3.937″ outer diameter, built from sturdy chrome steel. It handles combined loads up to 42,200 lbf and is designed for long-lasting performance.

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

This double-row construction provides extra stability, ideal for heavy-duty applications like truck axles or industrial gearboxes. Compliant with RoHS and REACH standards, it’s a reliable choice for replacements or new installations.

Weighing 3.1 lb, it’s robust yet manageable for its size. The standard radial clearance ensures easy fitting, with options for C3, C4, or C5 available if needed.

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Product Parameters

  • Part Number 387A-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 2.76"
  • 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 387A
  • 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 3.1 lb

Features

How Is 387A-384ED Bearing Engineered for Reliability?

387A-384ED 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 wear and extending service life.
With a temperature range of -30° to 110°C, it performs reliably in various conditions.

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

387A-384ED Bearing is built with chrome steel rings and rollers, offering excellent heat resistance.
It operates efficiently within a temperature range of -30° to 110°C, making it suitable for demanding environments.
The double-row design distributes loads evenly, enhancing performance under stress.
Its standard radial clearance ensures smooth operation even in high-temperature settings.

Built for Durability: 387A-384ED Bearing

387A-384ED Bearing’s chrome steel construction provides long-lasting performance in heavy-duty applications.
The double-row tapered roller design handles combined loads effectively, with a dynamic radial rating of 10,900 lbf for two rows.
Its steel cage ensures proper roller alignment, minimising wear.
The bearing’s standard radial clearance options allow for flexibility in various operating conditions.

Steel vs Ceramic Bearings: Strengths of 387A-384ED Bearing

387A-384ED Bearing uses chrome steel for both rings and rollers, offering a balance of strength and cost-effectiveness.
Its dynamic radial load capacity of 42,200 lbf makes it suitable for heavy industrial use.
The steel cage provides reliable roller alignment, reducing maintenance needs.
With a temperature range of -30° to 110°C, it performs consistently in diverse environments.

Application

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

In automotive applications, 387A-384ED Bearing supports wheel hubs and differential systems, providing reliable performance under radial and thrust loads. Its inch sizing makes it a preferred choice for North American vehicle models.

For industrial conveyor systems, 387A-384ED Bearing’s tapered roller design offers smooth operation and easy maintenance. The open seal type allows for straightforward lubrication, extending service life in high-use scenarios.

Where Is 387A-384ED Bearing Used?
387A-384ED Bearing finds its place in mining equipment, where its robust construction withstands harsh conditions. The dynamic radial load capacity ensures consistent performance under heavy stress.

In wind turbines, 387A-384ED Bearing supports rotor shafts, handling both radial and axial loads effectively. The steel cage enhances stability, making it suitable for high-speed rotations.

Built for Heavy-Duty Use: 387A-384ED Bearing
387A-384ED Bearing is ideal for railway applications, such as axle boxes, where its tapered rollers manage varying load conditions. The standard radial clearance offers flexibility for different operational needs.

In material handling equipment, 387A-384ED Bearing ensures smooth movement of heavy loads. Its ABEC-1 rating provides a balance of precision and cost-effectiveness for industrial use.

Automotive vs Aerospace: Applications of 387A-384ED Bearing
In automotive systems, 387A-384ED Bearing is often found in truck transmissions, where its combined load capacity is crucial. The inch measurements align with standard automotive components.

For aerospace ground support equipment, 387A-384ED Bearing’s reliability and temperature tolerance make it a practical choice. The open design simplifies inspections and maintenance.

Q&A

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