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28990-28921DC TDO (Two-Row Double-Outer Race) (Imperial)

28990-28921DC TDO (Two-Row Double-Outer Race) (Imperial)

The 28990-28921DC is a double-row tapered roller bearing with a 2.44″ bore and 3.937″ outer diameter, built from sturdy chrome steel. It handles combined loads up to 41,500 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 well in temperatures ranging from -30°C to 110°C, making it versatile for various conditions.

This model is part of the 28900 series and comes with standard cups for straightforward installation. Ideal for heavy-duty applications like industrial gearboxes or construction equipment where both radial and thrust loads are present.

Weighing 3.4 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it’s a reliable choice for replacements or new installations.

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Product Parameters

  • Part Number 28990-28921DC
  • Brand TFL
  • Size 2.44" x 3.937" x 0.9688"
  • Bore Dia 2.44"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 3.937"
  • Outer Dia Tolerance +0.001" to 0
  • Double Cup Width 1.75"
  • Double Cup Width Tolerance +0.003" to -0.01
  • Cone Width 0.9688"
  • Cone Width Tolerance +0.002" to -0.01
  • Bearing Width Across Cups 2.125"
  • Bearing Width Across Cups Tolerance +0.008" to 0
  • Cup Backface ToClear Radius 0.03"
  • Cone Backface Backing Diameter 2.83"
  • Cup Frontface Backing Diameter 3.82"
  • Cage Cone Backface Clearance 0.02"
  • Dynamic Radial Load 41500 lbf
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 28990
  • Cup Part Number 28921DC
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Double Row
  • Seal Type Open
  • Cups Type Standard
  • Series 28900
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Rating(One Row 90 Million Revolutions) 6180 lbf
  • Dynamic Thrust Rating(90 Million Revolutions) 4500 lbf
  • Dynamic Radial Rating(Two Row 90 Million Revolutions) 10800 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 3.400 lb

Features

How Does 28990-28921DC Bearing Handle Combined Loads?

28990-28921DC Bearing is built with chrome steel rings and rollers, offering strong resistance to both radial and thrust loads.
Its dynamic radial load capacity reaches 41,500 lbf, ensuring reliable performance in heavy-duty applications.
The double-row tapered roller design distributes loads evenly, reducing stress and extending service life.
With a standard radial clearance, it provides smooth operation across various conditions.

What Makes 28990-28921DC Bearing Suitable for High-Temperature Applications?

28990-28921DC Bearing operates efficiently in temperatures ranging from -30° to 110°C.
The chrome steel construction ensures durability and performance even in demanding environments.
Its open design allows for easy lubrication, maintaining smooth operation under high heat.
This makes it a reliable choice for industrial and automotive applications.

Engineered for Precision: 28990-28921DC Bearing

28990-28921DC Bearing features precise tolerances, with bore diameter tolerance of +0.005″ to 0.
The double-row tapered roller design ensures accurate load distribution and minimal friction.
Its steel cage keeps rollers aligned, enhancing stability and reducing wear.
This precision engineering makes it ideal for applications requiring consistent performance.

Application

Industrial Uses of 28990-28921DC Bearing
The 28990-28921DC Bearing is widely used in heavy machinery, such as construction equipment and mining tools, where its double-row design handles combined radial and thrust loads efficiently.
Its chrome steel construction ensures durability in demanding environments, making it a reliable choice for long-term use.

Where Is 28990-28921DC Bearing Used?
You’ll often find the 28990-28921DC Bearing in automotive applications like truck wheel hubs, where its tapered roller design provides stability under heavy loads.
The inch sizing makes it compatible with many North American industrial and automotive standards.

Built for Heavy-Duty Use: 28990-28921DC Bearing
This bearing excels in agricultural machinery, such as tractors and harvesters, thanks to its robust construction and high dynamic load capacity.
The open seal type allows for easy lubrication, ensuring smooth operation even in dusty conditions.

Automotive vs Aerospace: Applications of 28990-28921DC Bearing
In automotive systems, the 28990-28921DC Bearing supports heavy loads in axles and differentials, while in aerospace, it’s used in landing gear for its reliability.
The standard radial clearance option makes it versatile for various precision requirements.

Key Fields for 28990-28921DC Bearing
The 28990-28921DC Bearing is ideal for industrial fans and pumps, where its tapered rollers reduce friction and improve efficiency.
Its steel cage enhances stability, making it suitable for high-speed applications in manufacturing plants.

Q&A

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