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387A-384DRB TDO (Two-Row Double-Outer Race) (Imperial)

387A-384DRB TDO (Two-Row Double-Outer Race) (Imperial)

The 387A-384DRB is a double-row tapered roller bearing with a 2.25″ bore and 4.125″ outer diameter, built from sturdy chrome steel for long-lasting use. It handles combined loads up to 42200 lbf and is designed for smooth operation in various conditions.

Its open design allows for easy lubrication, while the steel cage ensures durability under heavy loads. The bearing can withstand temperatures from -30°C to 110°C, making it versatile for different environments.

This model is part of the 385 series, featuring standard cups for straightforward installation. Ideal for industrial machinery or heavy equipment where combined radial and thrust loads are common.

Weighing 3.63 lb, it offers a balance of strength and manageability. Compliant with RoHS and REACH standards, it’s a reliable choice for replacements or new installations.

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Product Parameters

  • Part Number 387A-384DRB
  • Brand TFL
  • Size 2.25" x 4.125" x 0.864"
  • Bore Dia 2.25"
  • 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 2.76"
  • 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 387A
  • 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 3.63 lb

Features

How Does 387A-384DRB Bearing Handle Combined Loads?

387A-384DRB 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 conditions.
The double-row tapered roller design distributes loads evenly, enhancing durability and reducing wear.
With a temperature range of -30° to 110°C, it performs well in various environments.

What Makes 387A-384DRB Bearing Suitable for Heavy-Duty Applications?

387A-384DRB Bearing features a steel cage that maintains roller alignment, extending its service life.
The chrome steel construction provides excellent strength and resistance to wear under heavy loads.
Its standard radial clearance options (C3/C4/C5) allow for flexibility in different applications.
The open design simplifies lubrication, ensuring smooth operation over time.

Engineered for Precision: 387A-384DRB Bearing

387A-384DRB Bearing’s tapered roller design ensures precise load distribution, reducing friction.
The double-row construction enhances stability, making it ideal for combined load scenarios.
With an ABEC-1 rating, it balances performance and cost-effectiveness for industrial use.
Its inch measurements (2.25″ x 4.125″) make it compatible with imperial system machinery.

Reliability Factors of 387A-384DRB Bearing

387A-384DRB Bearing’s chrome steel rollers and rings provide long-lasting performance.
The dynamic radial rating of 10,900 lbf (two-row) ensures reliability in heavy-duty applications.
Its standard lubrication requirement maintains optimal performance with minimal maintenance.
The bearing’s weight (3.63 lb) reflects its robust construction without unnecessary bulk.

Why Choose 387A-384DRB Bearing for Industrial Use?

387A-384DRB Bearing’s double-row design handles combined loads efficiently.
The chrome steel materials resist wear, ensuring a longer operational life.
Its temperature tolerance (-30° to 110°C) makes it versatile for various environments.
The open seal type allows for easy inspection and lubrication, reducing downtime.

Application

Industrial Uses of 387A-384DRB Bearing
The 387A-384DRB Bearing is commonly used in heavy machinery like construction equipment and agricultural vehicles, where its double-row design handles combined radial and thrust loads efficiently.
Its chrome steel construction ensures durability in harsh environments, making it a reliable choice for long-term use.

Where Is 387A-384DRB Bearing Used?
You’ll often find the 387A-384DRB Bearing in industrial gearboxes and power transmission systems, thanks to its robust tapered roller design.
The inch sizing makes it ideal for North American machinery, ensuring easy compatibility with existing setups.

Built for Heavy-Duty Use: 387A-384DRB Bearing
In mining equipment, the 387A-384DRB Bearing excels under extreme loads, providing stable performance even in dusty or wet conditions.
The open seal type allows for straightforward lubrication, extending its service life in demanding applications.

Automotive vs Aerospace: Applications of 387A-384DRB Bearing
In automotive applications, the 387A-384DRB Bearing supports heavy-duty axles and wheel hubs, offering reliable performance under stress.
For aerospace ground equipment, its precision and load capacity make it suitable for handling and maintenance machinery.

Key Fields for 387A-384DRB Bearing
The 387A-384DRB Bearing is a go-to for railway applications, where its combined load capacity ensures smooth operation in freight carriages.
Its standard radial clearance options provide flexibility for different operational needs, from high-speed to high-load scenarios.

Q&A

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