+86 15806631151 [email protected]
TFL BEARINGS
REQUEST A QUOTE
TS (Single Row Tapered Roller Bearings) (Imperial) 28990-28921A

TS (Single Row Tapered Roller Bearings) (Imperial) 28990-28921A

The 28990-28921A is a single-row tapered roller bearing with a 2.44″ bore and 3.937″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 23800 lbf radially and 4500 lbf in thrust, making it versatile for various applications.

Its open design allows for easy lubrication, while the steel cage ensures durability under heavy use. The bearing operates smoothly in temperatures ranging from -30°C to 110°C.

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’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it’s a safe choice for diverse environments.

Get A Free Quote
    Description Features Application Q&A Featured Products Our Process

Product Parameters

  • Part Number 28990-28921A
  • Brand TFL
  • Interchangeable Timken
  • Size 2.44" x 3.937" x 0.9689"
  • Bore Dia 2.44"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 3.937"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 0.9688"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 0.7813"
  • Cup Width Tolerance +0.002" to -0.01
  • Width 0.9689"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.080"
  • Cup Backface ToClear Radius 0.03"
  • Cone Frontface Backing Diameter 2.68"
  • Cone Backface Backing Diameter 2.83"
  • Cup Frontface Backing Diameter 3.82"
  • Cup Backface Backing Diameter 3.58"
  • Cage Cone Frontface Clearance 0.09"
  • Cage Cone Backface Clearance 0.02"
  • Effective Center Location -0.07"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 28990
  • Cup Part Number 28921A
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Cups Type Standard
  • Series 28900
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 23800 lbf
  • Static Radial Load 33500 lbf
  • Dynamic Radial Rating(90 Million Revolutions)(C90) 6180 lbf
  • Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 4500 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 28990-28921A Bearing

28990-28921A Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 23,800 lbf, ensuring reliable performance in demanding conditions.
The steel cage maintains roller alignment, reducing friction and extending operational life.
With a temperature range of -30° to 110°C, it performs well in various environments.

How Is 28990-28921A Bearing Engineered for Reliability?

28990-28921A Bearing features a single-row tapered roller design, ideal for handling both radial and thrust loads.
The chrome steel construction provides durability, while the standard radial clearance ensures smooth operation.
Its dynamic thrust rating of 4,500 lbf at 90 million revolutions highlights its long-term reliability.
This bearing is interchangeable with Timken models, offering flexibility in replacements.

Built for Durability: 28990-28921A Bearing

28990-28921A Bearing’s chrome steel rollers and rings enhance its wear resistance, even under heavy loads.
The open design allows for easy lubrication, maintaining performance over time.
With a static radial load capacity of 33,500 lbf, it suits industrial applications.
Its ABEC-1 rating ensures consistent precision in various operating conditions.

Application

Industrial Uses of 28990-28921A Bearing
The 28990-28921A Bearing is commonly used in heavy machinery like construction equipment and agricultural gear, where its tapered roller design handles combined loads efficiently. Its chrome steel construction ensures durability even in demanding environments.

Where Is 28990-28921A Bearing Used?
You’ll often find 28990-28921A Bearing in automotive applications, particularly in wheel hubs and differential systems. Its inch sizing makes it a reliable choice for older or custom-built vehicles.

Built for Heavy-Duty Use: 28990-28921A Bearing
This bearing excels in industrial conveyor systems, where its high dynamic radial load capacity keeps operations smooth. The open design simplifies lubrication, extending service life in dusty or high-temperature settings.

Automotive vs Aerospace: Applications of 28990-28921A Bearing
In automotive settings, 28990-28921A Bearing supports drivetrain components, while its precision makes it suitable for aerospace landing gear systems. The ABEC-1 rating ensures consistent performance across both fields.

Essential Roles of 28990-28921A Bearing
For mining equipment, 28990-28921A Bearing’s robust design handles extreme radial and thrust loads. The steel cage adds extra strength, making it ideal for high-vibration environments.

Q&A

SEND INQUIRY