TS (Single Row Tapered Roller Bearings) (Imperial) 25578-25521

The 25578-25521 is a single-row tapered roller bearing with a 1.6875″ bore and 3.27″ outer diameter, crafted from sturdy chrome steel. It handles combined loads, supporting up to 20300 lbf radially and 3020 lbf in thrust.

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

This model is interchangeable with Timken bearings, making it a practical choice for replacements. Ideal for heavy-duty applications like truck axles or industrial gearboxes where combined loads are common.

Weighing 1.3 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards for safe use.

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Description

Features

Application

Q&A

Product Parameters

Part Number 25578-25521
Brand TFL
Interchangeable Timken
Size 1.6875" x 3.27" x 0.9376"
Bore Dia 1.6875"
Bore Dia Tolerance +0.005" to 0
Outer Dia 3.27"
Outer Dia Tolerance +0.001" to 0
Cone Width 1"
Cone Width Tolerance +0.003" to -0.01
Cup Width 0.75"
Cup Width Tolerance +0.002" to -0.01
Width 0.9376"
Width Tolerance +0.008" to 0
Cone Backface ToClear Radius 0.09"
Cup Backface ToClear Radius 0.130"
Cone Frontface Backing Diameter 1.95"
Cone Backface Backing Diameter 2.09"
Cup Frontface Backing Diameter 3.05"
Cup Backface Backing Diameter 2.83"
Cage Cone Frontface Clearance 0.06"
Cage Cone Backface Clearance 0.01"
Effective Center Location -0.25"
System of Measurement Inch
Type Bearing
Cone Part Number 25578
Cup Part Number 25521
Bearing Type Roller
Roller Bearing Type Tapered
For Load Direction Combined
Construction Single Row
Seal Type Open
Cups Type Standard
Series 25500
Ring Material Chrome Steel
Roller Material Chrome Steel
Cage Material Steel
Dynamic Radial Load 20300 lbf
Static Radial Load 24900 lbf
Dynamic Radial Rating(90 Million Revolutions)(C90) 5270 lbf
Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 3020 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 1.3 lb

Features

Performance Features of 25578-25521 Bearing

25578-25521 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 20,300 lbf, ensuring reliable performance in demanding conditions.
The steel cage maintains roller alignment, reducing friction and extending operational life.
With an ABEC-1 rating, it provides consistent precision for various industrial applications.

How Is 25578-25521 Bearing Engineered for Reliability?

25578-25521 Bearing features a tapered roller design, optimised for handling both radial and thrust loads.
The chrome steel construction enhances durability, even in high-stress environments.
Its standard radial clearance allows for smooth operation, reducing wear over time.
With a temperature range of -30° to 110°C, it performs reliably in diverse conditions.

Built for Durability: 25578-25521 Bearing

25578-25521 Bearing’s single-row construction ensures stability under heavy combined loads.
The steel cage and chrome steel rollers minimise wear, extending the bearing’s service life.
Its dynamic thrust rating of 3,020 lbf makes it suitable for demanding applications.
Easy to maintain, it requires regular lubrication for optimal performance.

Steel vs Ceramic Bearings: Strengths of 25578-25521 Bearing

25578-25521 Bearing uses chrome steel for both rollers and rings, balancing strength and cost-effectiveness.
Its dynamic radial rating of 5,270 lbf at 90 million revolutions ensures long-term reliability.
The open design allows for easy lubrication, maintaining smooth operation.
With a weight of 1.3 lb, it offers a robust solution without excessive bulk.

Application

Industrial Uses of 25578-25521 Bearing
25578-25521 Bearing is commonly used in heavy machinery like construction equipment and agricultural gear, where its tapered roller design handles combined loads effectively. The chrome steel construction ensures durability even in demanding environments.

In automotive applications, 25578-25521 Bearing fits well in wheel hubs and differential systems, providing reliable performance under varying loads. Its imperial sizing makes it a straightforward replacement for Timken bearings in many US-made vehicles.

For industrial conveyor systems, 25578-25521 Bearing’s open design allows for easy lubrication, extending service life in high-load scenarios. The steel cage adds stability, making it suitable for continuous operation.

Where Is 25578-25521 Bearing Used?
25578-25521 Bearing finds its place in mining equipment, where its robust design copes with harsh conditions and heavy radial loads. The standard radial clearance offers flexibility for different operational needs.

In power transmission systems, 25578-25521 Bearing supports shafts and gears, ensuring smooth rotation under combined loads. Its ABEC-1 rating provides a balance of precision and cost-effectiveness for general industrial use.

Built for Heavy-Duty Use: 25578-25521 Bearing
25578-25521 Bearing excels in forestry machinery, handling both radial and thrust loads with ease. The tapered rollers distribute stress evenly, reducing wear over time.

For railway applications, 25578-25521 Bearing’s temperature tolerance makes it reliable in varying climates. Its compatibility with Timken designs simplifies maintenance and replacements.

Automotive vs Industrial: Applications of 25578-25521 Bearing
In trucks and buses, 25578-25521 Bearing ensures smooth operation in axle systems, thanks to its high dynamic load capacity. The inch measurements align with many North American vehicle standards.

For factory machinery, 25578-25521 Bearing’s steel cage and chrome steel rollers provide long-lasting performance. Its open design allows for regular lubrication, ideal for high-use environments.