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TS (Single Row Tapered Roller Bearings) (Imperial) 28678-28621

TS (Single Row Tapered Roller Bearings) (Imperial) 28678-28621

The 28678-28621 is a single-row tapered roller bearing with a 2″ bore and 3.8125″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 27700 lbf radially and 4950 lbf in thrust, making it versatile for various applications.

Its open design allows 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 alternative for replacements. Ideal for industrial machinery or automotive systems where combined loads are common.

Weighing 1.8 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 28678-28621
  • Brand TFL
  • Interchangeable Timken
  • Size 2" x 3.8125" x 0.9688"
  • Bore Dia 2"
  • 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 2.28"
  • Cone Backface Backing Diameter 2.56"
  • 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 28678
  • 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 1.8 lb

Features

Performance Features of 28678-28621 Bearing

28678-28621 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 27,700 lbf, ensuring reliable performance in demanding conditions.

The steel cage maintains proper roller alignment, reducing friction and wear.
With a static radial load of 32,000 lbf, it handles heavy-duty applications with ease.

28678-28621 Bearing operates efficiently within a temperature range of -30° to 110°C.
Its standard radial clearance options provide flexibility for various installation needs.

The tapered roller design ensures smooth operation under both radial and thrust loads.
This bearing is interchangeable with Timken models, offering compatibility and convenience.

Application

Industrial Uses of 28678-28621 Bearing
28678-28621 Bearing is commonly used in heavy machinery like construction equipment and agricultural gear, where its tapered roller design handles combined loads effectively. The inch sizing makes it a straightforward fit for North American industrial standards.

What Makes 28678-28621 Bearing a Preferred Choice?
In automotive applications, 28678-28621 Bearing works well in wheel hubs and differentials, thanks to its chrome steel construction and robust load capacity. Its open design simplifies lubrication, extending service life in demanding conditions.

Built for Heavy-Duty Use: 28678-28621 Bearing
For conveyor systems and mining equipment, 28678-28621 Bearing offers reliable performance under high radial and thrust loads. The steel cage ensures durability, even in gritty or high-vibration environments.

Automotive vs Aerospace: Applications of 28678-28621 Bearing
While 28678-28621 Bearing suits truck axles and off-road vehicles, its precision also makes it viable for aerospace ground support equipment. The ABEC-1 rating balances cost and performance for diverse needs.

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