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385X-384DRB TDO (Two-Row Double-Outer Race) (Imperial)

385X-384DRB TDO (Two-Row Double-Outer Race) (Imperial)

The 385X-384DRB is a double-row tapered roller bearing with a 2.1654″ bore and 4.125″ outer diameter, built from sturdy chrome steel. It handles combined loads up to 42200 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 in temperatures from -30°C to 110°C, making it versatile for various conditions.

This model is part of the 385 series, with standard radial clearance and ABEC-1 precision. Ideal for heavy-duty applications like truck axles or industrial gearboxes where reliability is key.

Weighing 3.77 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it’s a dependable choice for replacements or new installations.

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Product Parameters

  • Part Number 385X-384DRB
  • Brand TFL
  • Size 2.1654" x 4.125" x 0.864"
  • Bore Dia 2.1654"
  • 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 2.64"
  • 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 385X
  • 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 3.77 lb

Features

How Is 385X-384DRB Bearing Engineered for Reliability?

385X-384DRB Bearing features a double-row tapered roller design, providing excellent load distribution for combined radial and thrust loads.
Its chrome steel construction ensures durability and resistance to wear in demanding applications.
The dynamic radial load capacity of 42,200 lbf makes it suitable for heavy-duty machinery.
With a standard radial clearance, it offers reliable performance across various operating conditions.

What Makes 385X-384DRB Bearing Suitable for High-Temperature Applications?

385X-384DRB Bearing operates effectively within a temperature range of -30° to 110°C, maintaining performance in diverse environments.
The chrome steel rings and rollers enhance its resistance to thermal stress.
Its open design allows for easy lubrication, ensuring smooth operation even under high temperatures.
This makes it a dependable choice for industrial applications with varying thermal conditions.

Designed for Durability: 385X-384DRB Bearing

385X-384DRB Bearing is built with high-quality chrome steel components, ensuring long-lasting performance.
Its double-row construction provides stability and reduces wear under heavy loads.
The steel cage maintains proper roller alignment, enhancing the bearing’s lifespan.
With a dynamic radial rating of 10,900 lbf for two rows, it delivers consistent reliability in tough conditions.

Steel vs Ceramic Bearings: Strengths of 385X-384DRB Bearing

385X-384DRB Bearing utilises chrome steel for both rings and rollers, offering a balance of strength and cost-effectiveness.
This material choice ensures high load capacity and resistance to mechanical stress.
The steel cage further enhances durability and alignment precision.
While ceramic bearings may excel in specific scenarios, 385X-384DRB Bearing provides robust performance for general industrial use.

Application

Industrial Uses of 385X-384DRB Bearing
385X-384DRB Bearing is commonly used in heavy machinery, such as construction equipment and mining rigs, where its double-row design handles combined radial and thrust loads efficiently. The chrome steel construction ensures durability even in demanding environments.

In automotive applications, 385X-384DRB Bearing supports wheel hubs and differential systems, providing reliable performance under varying loads. Its inch sizing makes it a preferred choice for North American vehicle manufacturers.

For industrial automation, 385X-384DRB Bearing is ideal for conveyor systems and robotic arms, where precision and load capacity are key. The open seal design allows for easy lubrication, extending its service life.

Where Is 385X-384DRB Bearing Used?
You’ll often find 385X-384DRB Bearing in agricultural machinery, like tractors and harvesters, where its tapered roller design manages heavy loads smoothly. The steel cage adds extra strength for long-term use.

In wind turbines, 385X-384DRB Bearing plays a crucial role in the gearbox, handling high radial and thrust forces. Its standard radial clearance ensures consistent performance in varying temperatures.

Built for Heavy-Duty Use: 385X-384DRB Bearing
385X-384DRB Bearing is a go-to for railway applications, particularly in axle boxes, where its robust design withstands constant vibration and load. The ABEC-1 rating ensures reliable precision.

In marine equipment, 385X-384DRB Bearing excels in propeller shafts, thanks to its corrosion-resistant chrome steel rings. The double-row configuration provides stability in harsh saltwater conditions.

Automotive vs Aerospace: Applications of 385X-384DRB Bearing
In automotive settings, 385X-384DRB Bearing is trusted for drivetrain components, offering a balance of strength and efficiency. Its inch measurements align with standard automotive specs.

For aerospace ground support equipment, 385X-384DRB Bearing ensures smooth operation in load-handling systems. The tapered rollers distribute stress evenly, reducing wear over time.

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