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TS (Single Row Tapered Roller Bearings) (Imperial) 25878-25821

TS (Single Row Tapered Roller Bearings) (Imperial) 25878-25821

The 25878-25821 is a single-row tapered roller bearing with a 1.375″ bore and 2.875″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 19100 lbf radially and 2460 lbf 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 machinery like gearboxes or wheel hubs where combined loads are common.

Weighing just 1 lb, it’s lightweight yet robust for its size. Compliant with RoHS and REACH standards for safe and eco-friendly use.

The standard radial clearance and ABEC-1 rating make it suitable for general industrial applications. Its tapered roller design ensures even load distribution, enhancing longevity.

Perfect for maintenance tasks, its straightforward design simplifies installation and servicing. A dependable choice for both new builds and repairs.

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Product Parameters

  • Part Number 25878-25821
  • Brand TFL
  • Interchangeable Timken
  • Size 1.375" x 2.875" x 0.9375"
  • Bore Dia 1.375"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 2.875"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 0.9688"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 0.75"
  • Cup Width Tolerance +0.002" to -0.01
  • Width 0.9375"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.14"
  • Cup Backface ToClear Radius 0.03"
  • Cone Frontface Backing Diameter 1.59"
  • Cone Backface Backing Diameter 1.85"
  • Cup Frontface Backing Diameter 2.72"
  • Cup Backface Backing Diameter 2.56"
  • Cage Cone Frontface Clearance 0.09"
  • Cage Cone Backface Clearance 0.02"
  • Effective Center Location -0.32"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 25878
  • Cup Part Number 25821
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Cups Type Standard
  • Series 25800
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 19100 lbf
  • Static Radial Load 21900 lbf
  • Dynamic Radial Rating(90 Million Revolutions)(C90) 4960 lbf
  • Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 2460 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 lb

Features

How Is 25878-25821 Bearing Engineered for Reliability?

25878-25821 Bearing features chrome steel rings and rollers, ensuring strength and durability under combined loads.
Its dynamic radial load capacity reaches 19100 lbf, making it suitable for demanding industrial applications.

The tapered roller design distributes loads evenly, reducing stress and extending service life.
With a standard radial clearance, it offers reliable performance across various operating conditions.

25878-25821 Bearing operates within a temperature range of -30° to 110°C, maintaining stability in diverse environments.
Its steel cage keeps rollers aligned, minimising wear and ensuring smooth operation.

The open design simplifies lubrication, helping to maintain optimal performance over time.
This bearing meets ABEC-1 standards, providing consistent precision in industrial machinery.

Application

Industrial Uses of 25878-25821 Bearing
25878-25821 Bearing is commonly used in heavy machinery like construction equipment, where its tapered roller design handles combined radial and thrust loads effectively. The chrome steel construction ensures durability in demanding environments.

What Makes 25878-25821 Bearing a Preferred Choice?
In automotive applications, 25878-25821 Bearing fits well in wheel hubs and differential systems, thanks to its precise inch sizing and compatibility with Timken designs. The steel cage adds robustness for long-term performance.

Built for Heavy-Duty Use: 25878-25821 Bearing
For industrial fans and pumps, 25878-25821 Bearing’s open design simplifies lubrication, while its ABEC-1 rating ensures reliable operation. The standard radial clearance makes it adaptable to various load conditions.

Automotive vs Aerospace: Applications of 25878-25821 Bearing
25878-25821 Bearing suits automotive drivetrains due to its dynamic load capacity, while its temperature range (-30° to 110°C) meets general aerospace auxiliary system needs. The inch measurements align with imperial machinery standards.

Perfect Fit for Automation: 25878-25821 Bearing
In conveyor systems, 25878-25821 Bearing’s tapered rollers reduce friction, enhancing efficiency. The single-row design saves space, making it ideal for compact automated setups.

Q&A

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