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386A-384DRB TDO (Two-Row Double-Outer Race) (Imperial)

386A-384DRB TDO (Two-Row Double-Outer Race) (Imperial)

The 386A-384DRB is a double-row tapered roller bearing with a 1.875-inch bore and 4.125-inch outer diameter, crafted from sturdy chrome steel. It handles combined loads, with a dynamic radial load capacity of 42,200 lbf and a two-row dynamic radial rating of 10,900 lbf.

Its open design allows for easy lubrication, while the steel cage ensures durability. The bearing operates smoothly in temperatures ranging from -30°C to 110°C, making it versatile for various conditions.

This model is part of the 385 series and meets ABEC-1 standards. Ideal for heavy-duty applications like industrial gearboxes or machinery where combined loads are common.

Weighing 4.240 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it’s a reliable choice for replacements or new installations.

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Product Parameters

  • Part Number 386A-384DRB
  • Brand TFL
  • Size 1.875" x 4.125" x 0.864"
  • Bore Dia 1.875"
  • 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 2.2"
  • 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 386A
  • 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 4.240 lb

Features

How Is 386A-384DRB Bearing Engineered for Reliability?

386A-384DRB 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 service life.
With a standard radial clearance and ABEC-1 rating, it offers consistent performance in various applications.

386A-384DRB Bearing operates efficiently within a temperature range of -30° to 110°C.
Its open design allows for easy lubrication, ensuring smooth operation under heavy loads.

Application

Industrial Uses of 386A-384DRB Bearing
386A-384DRB 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 in demanding environments.

In automotive applications, 386A-384DRB Bearing supports wheel hubs and differential systems, providing reliable performance under high stress. Its inch sizing makes it compatible with many American and British vehicle models.

For industrial automation, 386A-384DRB Bearing is ideal for robotic arms and conveyor systems, where precision and load capacity are key. The open seal type allows for easy lubrication, extending its service life.

Where Is 386A-384DRB Bearing Used?
386A-384DRB Bearing finds its place in agricultural machinery, such as tractors and harvesters, due to its ability to withstand heavy loads and harsh conditions. The tapered roller design ensures smooth operation even under uneven stress.

In material handling systems, 386A-384DRB Bearing is a reliable choice for forklifts and cranes, where its dynamic radial load capacity ensures stability. The standard radial clearance offers flexibility for various operational needs.

Built for Heavy-Duty Use: 386A-384DRB Bearing
386A-384DRB Bearing excels in wind turbine applications, where its double-row construction manages both radial and axial forces efficiently. The steel cage enhances its resistance to wear in high-speed rotations.

For railway applications, 386A-384DRB Bearing supports axle boxes, ensuring smooth and safe operation. Its temperature range makes it suitable for varying climatic conditions.

Automotive vs Aerospace: Applications of 386A-384DRB Bearing
In automotive systems, 386A-384DRB Bearing is used in transmissions and drivetrains, offering robust performance. In aerospace, it’s less common but can be found in ground support equipment due to its load-handling capabilities.

For industrial fans and blowers, 386A-384DRB Bearing provides reliable support, thanks to its dynamic thrust rating. The open design allows for easy maintenance in dusty environments.

Q&A

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