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

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

The 389A-384DC is a two-row tapered roller bearing with a 2.125″ bore and 3.937″ outer diameter, built from sturdy chrome steel for long-lasting performance. It handles combined loads with a dynamic radial capacity of 42200 lbf and operates smoothly in temperatures from -30°C to 110°C.

Its double-row design provides extra stability under heavy loads, while the open seal allows for easy lubrication. The steel cage ensures durability, making it suitable for high-demand applications.

This bearing is ideal for industrial machinery, gearboxes, or heavy equipment where combined radial and thrust loads are common. Compliant with RoHS and REACH standards, it’s a reliable choice for replacements or upgrades.

Weighing 3.52 lb, it’s robust yet manageable for its size. The standard radial clearance ensures easy installation and maintenance.

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Product Parameters

  • Part Number 389A-384DC
  • Brand TFL
  • Size 2.125" x 3.937" x 0.864"
  • Bore Dia 2.125"
  • 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 2.4"
  • 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 389A
  • Cup Part Number 384DC
  • 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 3.52 lb

Features

How Is 389A-384DC Bearing Engineered for Reliability?

389A-384DC Bearing features a double-row tapered roller design, providing strong resistance to combined radial and thrust loads.
Its chrome steel rings and rollers ensure durability, even under heavy dynamic radial loads of 42,200 lbf.
The steel cage maintains proper roller alignment, reducing friction and extending the bearing’s service life.
With a standard radial clearance and ABEC-1 rating, it offers reliable performance in various applications.

What Makes 389A-384DC Bearing Suitable for High-Temperature Applications?

389A-384DC Bearing operates efficiently within a temperature range of -30° to 110°C, making it suitable for demanding environments.
The chrome steel construction resists heat-related wear, ensuring consistent performance under thermal stress.
Its double-row design distributes loads evenly, reducing heat buildup during operation.
Proper lubrication further enhances its ability to handle high-temperature conditions.

Designed for Durability: 389A-384DC Bearing

389A-384DC Bearing is built with robust chrome steel rings and rollers, ensuring long-lasting performance.
Its double-row tapered roller design handles both radial and thrust loads efficiently.
The steel cage provides stability, keeping rollers aligned for smooth operation.
With a dynamic radial load capacity of 42,200 lbf, it excels in heavy-duty applications.

Steel vs Ceramic Bearings: Strengths of 389A-384DC Bearing

389A-384DC Bearing uses high-quality chrome steel for its rings and rollers, offering excellent strength and wear resistance.
This material choice ensures reliable performance under heavy loads and harsh conditions.
The steel cage adds durability, maintaining roller alignment over extended use.
While ceramic bearings may offer some advantages, 389A-384DC Bearing provides a cost-effective solution for most industrial applications.

Application

Industrial Uses of 389A-384DC Bearing
389A-384DC 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, 389A-384DC Bearing supports wheel hubs and differential systems, providing reliable performance under high stress. Its inch sizing makes it a preferred choice for American-made vehicles.

For industrial conveyors, 389A-384DC Bearing’s tapered roller design offers smooth operation and long service life. The open seal type allows for easy lubrication, reducing maintenance downtime.

What Makes 389A-384DC Bearing a Preferred Choice?
389A-384DC Bearing is ideal for agricultural machinery, where its robust design withstands dirt and debris. The standard radial clearance ensures consistent performance in varying conditions.

In material handling systems, 389A-384DC Bearing’s high dynamic load capacity makes it suitable for heavy lifting. The steel cage adds extra strength, preventing deformation under pressure.

Built for Heavy-Duty Use: 389A-384DC Bearing
389A-384DC Bearing excels in forestry equipment, handling uneven loads and rough terrain. Its ABEC-1 rating balances precision and cost-effectiveness for industrial applications.

For railway applications, 389A-384DC Bearing’s temperature range ensures reliability in extreme weather. The double-row construction distributes loads evenly, reducing wear over time.

Q&A

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