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TS (Single Row Tapered Roller Bearings) (Imperial) 28680-28621

TS (Single Row Tapered Roller Bearings) (Imperial) 28680-28621

The 28680-28621 is a single-row tapered roller bearing with a 2.1875″ bore and 3.8125″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 27700 lbf radially and 4950 lbf thrust, making it versatile for various applications.

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

This model is interchangeable with Timken bearings, offering a reliable replacement option. Ideal for heavy-duty machinery like gearboxes or axles where combined loads are common.

Weighing 1.6 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it meets safety and environmental requirements.

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Product Parameters

  • Part Number 28680-28621
  • Brand TFL
  • Interchangeable Timken
  • Size 2.1875" x 3.8125" x 0.9688"
  • Bore Dia 2.1875"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 3.8125"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 0.9688"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 0.7656"
  • Cup Width Tolerance +0.002" to -0.01
  • Width 0.9688"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.14"
  • Cup Backface ToClear Radius 0.03"
  • Cone Frontface Backing Diameter 2.44"
  • Cone Backface Backing Diameter 2.68"
  • Cup Frontface Backing Diameter 3.66"
  • Cup Backface Backing Diameter 3.46"
  • Cage Cone Frontface Clearance 0.1"
  • Cage Cone Backface Clearance 0.04"
  • Effective Center Location -0.13"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 28680
  • Cup Part Number 28621
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Cups Type Standard
  • Series 28600
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 27700 lbf
  • Static Radial Load 32000 lbf
  • Dynamic Radial Rating(90 Million Revolutions)(C90) 7180 lbf
  • Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 4950 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 28680-28621 Bearing

28680-28621 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 27,700 lbf, making it suitable for heavy-duty applications.
The steel cage ensures proper roller alignment, enhancing durability and reducing friction.
With a temperature range of -30° to 110°C, it performs reliably in various conditions.

How Does 28680-28621 Bearing Reduce Friction?

28680-28621 Bearing features a tapered roller design that minimises friction during operation.
The chrome steel construction ensures smooth rolling action, even under high radial loads.
Its effective centre location of -0.13″ helps distribute loads evenly across the rollers.
This design reduces wear and extends the bearing’s service life.

Engineered for Precision: 28680-28621 Bearing

28680-28621 Bearing offers precise performance with its standard radial clearance option.
The ABEC-1 rating ensures consistent quality for applications requiring reliable rotation.
Its tapered rollers handle both radial and thrust loads efficiently.
The bearing’s dimensions maintain tight tolerances for accurate fit and function.

Steel vs Ceramic Bearings: Strengths of 28680-28621 Bearing

28680-28621 Bearing uses chrome steel for both rings and rollers, providing excellent strength.
This material choice makes it more cost-effective than ceramic options while maintaining durability.
The steel construction withstands high dynamic loads up to 27,700 lbf radial capacity.
It’s particularly suitable for industrial applications where reliability is key.

Application

Industrial Uses of 28680-28621 Bearing
The 28680-28621 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 in tough working conditions.

In automotive applications, 28680-28621 Bearing fits well in wheel hubs and differential systems, providing reliable performance under varying loads. The inch sizing makes it a convenient choice for vehicles using imperial measurements.

For industrial conveyor systems, 28680-28621 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 28680-28621 Bearing Used?
You’ll often find 28680-28621 Bearing in mining equipment, where its robust design handles heavy radial and thrust loads. The standard radial clearance ensures smooth operation even in dusty environments.

In power transmission systems, 28680-28621 Bearing supports shafts and gears, thanks to its tapered roller construction. The ABEC-1 rating makes it a practical choice for general industrial applications.

Built for Heavy-Duty Use: 28680-28621 Bearing
The 28680-28621 Bearing excels in applications like forklifts and cranes, where its combined load capacity is essential. Its chrome steel rollers provide consistent performance under stress.

For railway applications, 28680-28621 Bearing’s durability and temperature resistance make it a reliable choice. The inch measurements ensure compatibility with older machinery still using imperial standards.

Automotive vs Aerospace: Applications of 28680-28621 Bearing
In automotive settings, 28680-28621 Bearing is ideal for drivetrains, offering smooth performance under varying speeds. Its static radial load capacity ensures longevity in demanding conditions.

For aerospace ground equipment, 28680-28621 Bearing provides reliable support in load-handling systems. The steel cage and chrome steel rollers enhance its resistance to wear and tear.

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