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28985-28921D TDO (Two-Row Double-Outer Race) (Imperial)

28985-28921D TDO (Two-Row Double-Outer Race) (Imperial)

The 28985-28921D is a two-row tapered roller bearing with a 2.375″ bore and 3.937″ outer diameter, built from sturdy chrome steel for long-lasting performance. It handles combined loads up to 41,500 lbf and is designed for smooth operation in a range of temperatures from -30°C to 110°C.

Its double-row construction provides extra stability, while the open design allows for easy lubrication. The steel cage ensures durability, making it a reliable choice for heavy-duty applications.

This bearing is ideal for industrial machinery, gearboxes, or automotive systems where high radial and thrust loads are common. It comes in standard radial clearance but is also available in C3, C4, or C5 options for specific needs.

Weighing 3.57 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it’s a safe and dependable option for various engineering projects.

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Product Parameters

  • Part Number 28985-28921D
  • Brand TFL
  • Size 2.375" x 3.937" x 1"
  • Bore Dia 2.375"
  • 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 1"
  • Cone Width Tolerance +0.002" to -0.01
  • Bearing Width Across Cups 2.1874"
  • Bearing Width Across Cups Tolerance +0.008" to 0
  • Cup Backface ToClear Radius 0.03"
  • Cone Backface Backing Diameter 2.87"
  • Cup Frontface Backing Diameter 3.82"
  • Cage Cone Backface Clearance 0.05"
  • Dynamic Radial Load 41500 lbf
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 28985
  • Cup Part Number 28921D
  • 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 3.57 lb

Features

How Is 28985-28921D Bearing Engineered for Reliability?

28985-28921D Bearing features a double-row tapered roller design, providing robust support for combined radial and thrust loads.
Its chrome steel construction ensures durability and resistance to wear in demanding conditions.
The standard radial clearance allows for smooth operation, while the open seal design simplifies maintenance.
With a dynamic radial load capacity of 41,500 lbf, it handles heavy-duty applications with ease.

What Makes 28985-28921D Bearing Suitable for High-Temperature Applications?

28985-28921D Bearing operates reliably in temperatures ranging from -30° to 110 °C, making it versatile for various environments.
The chrome steel rollers and rings maintain performance under thermal stress, reducing the risk of deformation.
Its tapered roller design ensures even load distribution, minimising heat buildup.
This bearing is ideal for applications where temperature fluctuations are common.

Designed for Durability: 28985-28921D Bearing

28985-28921D Bearing’s double-row construction enhances load capacity and extends service life.
The steel cage keeps rollers aligned, preventing misalignment and reducing wear.
Its precision tolerances ensure consistent performance, even under heavy loads.
This bearing is built to last, offering reliability in industrial and automotive applications.

Application

Industrial Uses of 28985-28921D Bearing
28985-28921D Bearing is commonly used in heavy machinery, such as construction equipment and mining rigs, where its double-row design handles combined radial and thrust loads effectively. The chrome steel construction ensures durability even in demanding environments.

In automotive applications, 28985-28921D Bearing supports wheel hubs and differential systems, providing reliable performance under varying loads. Its inch sizing makes it compatible with many American and British vehicle models.

For industrial conveyor systems, 28985-28921D Bearing’s tapered roller design offers smooth operation and long service life. The open seal type allows for easy lubrication, reducing maintenance downtime.

Where Is 28985-28921D Bearing Used?
28985-28921D Bearing finds its place in agricultural machinery, particularly in tractors and harvesters, where its robust design withstands harsh conditions. The standard radial clearance ensures consistent performance.

In material handling equipment, 28985-28921D Bearing’s high dynamic radial load capacity makes it ideal for forklifts and cranes. The steel cage adds extra strength, prolonging bearing life.

Built for Heavy-Duty Use: 28985-28921D Bearing
28985-28921D Bearing is a go-to choice for railway applications, such as axle boxes, due to its ability to handle heavy loads and vibrations. The ABEC-1 rating ensures reliable precision.

In wind turbine systems, 28985-28921D Bearing’s tapered rollers provide stability under fluctuating wind forces. The temperature range of -30° to 110°C ensures performance in diverse climates.

Automotive vs Aerospace: Applications of 28985-28921D Bearing
In automotive settings, 28985-28921D Bearing is often found in truck transmissions, where its combined load capacity is crucial. The inch measurements simplify replacements in older models.

For aerospace ground equipment, 28985-28921D Bearing supports landing gear testing rigs, offering precision and durability. The chrome steel rollers resist wear even during intensive use.

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