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

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

The 28990-28921 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 for safe and eco-friendly use.

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Product Parameters

  • Part Number 28990-28921
  • 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 0.130"
  • Cone Frontface Backing Diameter 2.68"
  • Cone Backface Backing Diameter 2.83"
  • Cup Frontface Backing Diameter 3.82"
  • Cup Backface Backing Diameter 3.50"
  • 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 28921
  • 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

How Does 28990-28921 Bearing Handle Combined Loads?

28990-28921 Bearing is designed with chrome steel rings and rollers, providing strong resistance to both radial and thrust loads.
Its dynamic radial load capacity reaches 23,800 lbf, ensuring reliable performance in demanding applications.
The steel cage keeps the rollers aligned, reducing wear and extending service life.
With a maximum temperature range of -30° to 110°C, it performs well in various environments.

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

28990-28921 Bearing operates efficiently in temperatures ranging from -30° to 110°C, making it versatile for different conditions.
The chrome steel construction ensures durability and resistance to wear under high stress.
Its open design allows for easy lubrication, maintaining smooth operation.
The standard radial clearance options provide flexibility for various applications.

Engineered for Precision: 28990-28921 Bearing

28990-28921 Bearing features a single row tapered roller design, optimised for combined load handling.
The precise cone and cup dimensions ensure accurate alignment and reduced friction.
Its ABEC-1 rating guarantees consistent performance in industrial applications.
The steel cage enhances stability, even under heavy loads.

Application

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

Where Is 28990-28921 Bearing Used?
You’ll often find 28990-28921 Bearing in automotive applications, particularly in wheel hubs and drivetrains, where its high load capacity and precision are essential. The imperial sizing makes it a good fit for North American vehicle designs.

Built for Heavy-Duty Use: 28990-28921 Bearing
In industrial settings, 28990-28921 Bearing excels in conveyor systems and gearboxes, thanks to its robust steel cage and tapered rollers. The open design allows for easy lubrication, extending its service life.

Automotive vs Aerospace: Applications of 28990-28921 Bearing
While 28990-28921 Bearing is popular in automotive wheel assemblies, it’s also suitable for aerospace landing gear components where reliability under heavy loads is critical. The ABEC-1 rating ensures consistent performance.

Perfect Fit for Automation: 28990-28921 Bearing
In automated production lines, 28990-28921 Bearing supports robotic arms and precision machinery, offering smooth operation under combined loads. Its standard radial clearance makes it versatile for various industrial applications.

Q&A

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