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389-384DRB TDO (Two-Row Double-Outer Race) (Imperial)

389-384DRB TDO (Two-Row Double-Outer Race) (Imperial)

The 389-384DRB is a double-row tapered roller bearing with a 2.188″ bore and 4.125″ outer diameter, built from sturdy chrome steel. It handles combined loads well, 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 bearing is ideal for heavy-duty applications like industrial machinery or vehicle axles where combined loads are common. With standard radial clearance and ABEC-1 rating, it offers reliable performance without unnecessary complexity.

Weighing 3.73 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it’s a safe choice for most industrial environments.

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Product Parameters

  • Part Number 389-384DRB
  • Brand TFL
  • Size 2.188" x 4.125" x 0.864"
  • Bore Dia 2.188"
  • 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 2.56"
  • 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 389
  • 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 3.73 lb

Features

How Does 389-384DRB Bearing Handle Combined Loads?

389-384DRB Bearing features a double-row tapered roller design, ideal for handling both radial and thrust loads.
Its chrome steel construction ensures durability, with a dynamic radial load capacity of 42,200 lbf.
The steel cage maintains proper roller alignment, enhancing performance and longevity.
With a temperature range of -30° to 110°C, it operates reliably in various conditions.

Why Choose 389-384DRB Bearing for Heavy-Duty Applications?

389-384DRB Bearing’s double-row design provides superior load distribution, reducing stress on individual rollers.
The chrome steel rollers and rings offer excellent wear resistance, even under high loads.
Its standard radial clearance ensures smooth operation, suitable for a wide range of industrial uses.
The bearing’s ABEC-1 rating guarantees consistent precision and reliability.

Built for Reliability: 389-384DRB Bearing

389-384DRB Bearing is constructed with high-quality chrome steel, ensuring long service life.
Its tapered roller design efficiently manages combined loads, making it versatile for various applications.
The open seal type allows for easy lubrication, maintaining optimal performance.
With a weight of 3.73 lb, it balances strength and manageability.

Steel vs Ceramic Bearings: Strengths of 389-384DRB Bearing

389-384DRB Bearing uses chrome steel for both rollers and rings, providing excellent strength and durability.
This material choice ensures reliable performance under heavy loads and high temperatures.
The steel cage design keeps rollers in place, minimising wear and extending bearing life.
Its compliance with RoHS and REACH standards makes it an environmentally friendly option.

Application

Industrial Uses of 389-384DRB Bearing
389-384DRB 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, 389-384DRB Bearing supports axle systems and wheel hubs, providing reliable performance under varying load conditions. Its inch sizing makes it a preferred choice for North American vehicle models.

Where Is 389-384DRB Bearing Used?
You’ll often find 389-384DRB Bearing in agricultural machinery, like tractors and harvesters, where its robust design withstands rough terrain and heavy loads. The open seal type allows for easy lubrication and maintenance.
For industrial fans and pumps, 389-384DRB Bearing offers smooth operation and long service life, thanks to its tapered roller design and high dynamic load capacity.

Built for Heavy-Duty Use: 389-384DRB Bearing
389-384DRB Bearing excels in conveyor systems, where its double-row configuration manages high radial loads efficiently. The steel cage adds stability, reducing wear over time.
In material handling equipment, 389-384DRB Bearing ensures reliable performance, even under continuous operation. Its standard radial clearance makes it versatile for various industrial settings.

Automotive vs Aerospace: Applications of 389-384DRB Bearing
In automotive systems, 389-384DRB Bearing is ideal for drivetrains and differentials, offering consistent performance under combined loads. The ABEC-1 rating ensures adequate precision for most vehicle applications.
For aerospace ground support equipment, 389-384DRB Bearing provides dependable operation, though it’s not typically used in-flight due to its standard temperature range.

Key Fields for 389-384DRB Bearing
389-384DRB Bearing is a solid choice for railway applications, particularly in freight car axles, where its durability and load capacity are crucial. The inch measurements align with many North American rail standards.
In industrial gearboxes, 389-384DRB Bearing’s tapered roller design ensures smooth power transmission, even under heavy loads. The chrome steel rollers enhance its resistance to wear.

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