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388A-384D TDO (Two-Row Double-Outer Race) (Imperial)

388A-384D TDO (Two-Row Double-Outer Race) (Imperial)

The 388A-384D is a double-row tapered roller bearing with a 2.265″ bore and 3.937″ outer diameter, built from sturdy chrome steel. It handles combined loads up to 42200 lbf and suits applications needing reliable radial and thrust support.

Its open design allows for easy lubrication, while the steel cage ensures durability under heavy use. The bearing operates smoothly in temperatures ranging from -30°C to 110°C.

This model features standard cups and is part of the 385 series, offering consistent performance. Ideal for industrial machinery or vehicle axles where combined loads are common.

Weighing 3.270 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it’s a safe choice for various environments.

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Product Parameters

  • Part Number 388A-384D
  • Brand TFL
  • Size 2.265" x 3.937" x 0.864"
  • Bore Dia 2.265"
  • 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 2.76"
  • 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 388A
  • 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 3.270 lb

Features

Why Choose 388A-384D Bearing for Combined Loads?

388A-384D Bearing is built with chrome steel rings and rollers, offering strong resistance to both radial and thrust loads.
Its dynamic radial load capacity reaches 42,200 lbf, ensuring reliable performance in demanding applications.

The double-row tapered roller design of 388A-384D Bearing distributes loads evenly, reducing wear and extending service life.
With a standard radial clearance and ABEC-1 rating, it balances precision and durability.

388A-384D Bearing operates efficiently in temperatures from -30° to 110°C, making it suitable for varied environments.
The steel cage maintains roller alignment, ensuring smooth operation under heavy loads.

Designed for easy lubrication, 388A-384D Bearing reduces maintenance needs while maintaining performance.
Its open seal type allows for straightforward inspection and servicing when required.

Application

Industrial Uses of 388A-384D Bearing
The 388A-384D Bearing is commonly used in heavy machinery like 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.

Where Is 388A-384D Bearing Used?
You’ll often find 388A-384D Bearing in industrial gearboxes and power transmission systems, thanks to its robust tapered roller design. The inch sizing makes it a popular choice for North American machinery.

Built for Heavy-Duty Use: 388A-384D Bearing
This bearing excels in applications like mining equipment and large conveyor systems, where its high dynamic radial load capacity is essential. The open seal design allows for easy lubrication and maintenance.

Automotive vs Aerospace: Applications of 388A-384D Bearing
In automotive systems, 388A-384D Bearing supports heavy axles and wheel hubs, while in aerospace, it’s used in landing gear assemblies. Its temperature range and ABEC-1 rating make it versatile for both industries.

Practical Applications of 388A-384D Bearing
For railway applications, 388A-384D Bearing provides reliable performance in bogies and traction motors. The standard radial clearance ensures smooth operation even under varying load conditions.

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