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TS (Single Row Tapered Roller Bearings) (Imperial) 389A-383A

TS (Single Row Tapered Roller Bearings) (Imperial) 389A-383A

The 389A-383A is a single-row tapered roller bearing with a 2.125″ bore and 3.937″ outer diameter, crafted from sturdy chrome steel. It manages combined loads up to 24200 lbf radially and 3810 lbf thrust-wise, suitable for moderate-speed applications.

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

This model is interchangeable with Timken bearings, offering a reliable replacement option. Ideal for industrial machinery or automotive systems where combined loads are common.

Weighing 1.6 lb, it balances strength and portability. Compliant with RoHS and REACH standards, it meets safety and environmental requirements.

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Product Parameters

  • Part Number 389A-383A
  • Brand TFL
  • Interchangeable Timken
  • Size 2.125" x 3.937" x 0.8268"
  • Bore Dia 2.125"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 3.937"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 0.864"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 0.7018"
  • Cup Width Tolerance +0.002" to -0.01
  • Width 0.8268"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.03"
  • Cup Backface ToClear Radius 0.08"
  • Cone Frontface Backing Diameter 2.36"
  • Cone Backface Backing Diameter 2.4"
  • Cup Frontface Backing Diameter 3.68"
  • Cup Backface Backing Diameter 3.50"
  • Cage Cone Frontface Clearance 0.11"
  • Cage Cone Backface Clearance 0.03"
  • Effective Center Location -0.12"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 389A
  • Cup Part Number 383A
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Cups Type Standard
  • Series 385
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 24200 lbf
  • Static Radial Load 24100 lbf
  • Dynamic Radial Rating(90 Million Revolutions)(C90) 6280 lbf
  • Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 3810 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 1.6 lb

Features

Performance Features of 389A-383A Bearing

389A-383A Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 24,200 lbf, making it suitable for heavy-duty applications.
The steel cage ensures proper roller alignment, reducing friction and extending operational life.
With a temperature range of -30° to 110°C, it performs reliably in various environments.

Why Choose 389A-383A Bearing for Precision Tasks?

389A-383A Bearing features precise tolerances, with bore diameter tolerance of +0.005″ to 0.
This ensures accurate performance in applications requiring high precision.
The tapered roller design efficiently handles both radial and thrust loads.
Its standard radial clearance provides smooth operation in diverse conditions.

Engineered for Reliability: 389A-383A Bearing

389A-383A Bearing’s single-row construction enhances stability under heavy loads.
The chrome steel components resist wear, ensuring long-term durability.
Its dynamic thrust rating of 3,810 lbf supports reliable performance in demanding tasks.
The open design allows for easy lubrication, maintaining optimal efficiency.

Steel vs Ceramic Bearings: Strengths of 389A-383A Bearing

389A-383A Bearing uses chrome steel for both rings and rollers, balancing strength and cost-effectiveness.
This material choice provides excellent resistance to wear and fatigue.
The bearing’s ABEC-1 rating ensures consistent performance in standard applications.
With a weight of 1.6 lb, it offers a sturdy yet manageable solution for industrial use.

Application

Industrial Uses of 389A-383A Bearing
The 389A-383A Bearing is widely used in heavy machinery, such as construction equipment and agricultural gear, where its tapered roller design handles combined loads efficiently. Its chrome steel construction ensures durability even in demanding environments.

In automotive applications, 389A-383A Bearing fits well in wheel hubs and differential systems, providing reliable performance under radial and thrust loads. The inch sizing makes it compatible with many American-made vehicles.

For industrial conveyor systems, 389A-383A Bearing’s open design allows for easy lubrication, extending its service life in high-load scenarios. The steel cage adds extra strength, making it suitable for continuous operation.

Where Is 389A-383A Bearing Used?
You’ll often find 389A-383A Bearing in mining equipment, where its robust design handles heavy radial and axial loads. The standard radial clearance ensures smooth operation even under tough conditions.

In manufacturing plants, this bearing supports machinery like presses and gearboxes, thanks to its high dynamic load capacity. The ABEC-1 rating makes it a cost-effective choice for general industrial use.

Built for Heavy-Duty Use: 389A-383A Bearing
The 389A-383A Bearing excels in applications like forklifts and cranes, where its tapered rollers distribute loads evenly. Its temperature range of -30° to 110°C ensures reliability in varying climates.

For power transmission systems, this bearing’s steel cage and chrome steel rollers provide long-lasting performance. The easy lubrication feature helps maintain efficiency over time.

Automotive vs Aerospace: Applications of 389A-383A Bearing
In automotive systems, 389A-383A Bearing is commonly used in axles and transmissions, offering a balance of strength and precision. Its inch measurements align with many standard vehicle designs.

For aerospace ground equipment, this bearing supports heavy loads in maintenance tools and loading systems. The chrome steel materials resist wear, even with frequent use.

Q&A

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