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25578-25520D TDO (Two-Row Double-Outer Race) (Imperial)

25578-25520D TDO (Two-Row Double-Outer Race) (Imperial)

The 25578-25520D is a two-row tapered roller bearing with a 1.6875″ bore and 3.265″ outer diameter, built from sturdy chrome steel. It handles combined loads well, with a dynamic radial load capacity of 35400 lbf.

Its double-row design provides extra stability, while the open seal allows for easy lubrication. The bearing operates smoothly in temperatures from -30°C to 110°C.

This model is part of the 25500 series and comes with standard cups for straightforward installation. Ideal for heavy-duty applications like truck axles or industrial gearboxes.

Weighing 2.93 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, ensuring safe and reliable use.

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Product Parameters

  • Part Number 25578-25520D
  • Brand TFL
  • Size 1.6875" x 3.265" x 1"
  • Bore Dia 1.6875"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 3.265"
  • Outer Dia Tolerance +0.001" to 0
  • Double Cup Width 1.875"
  • Double Cup Width Tolerance +0.003" to -0.01
  • Cone Width 1"
  • Cone Width Tolerance +0.002" to -0.01
  • Bearing Width Across Cups 2.25"
  • Bearing Width Across Cups Tolerance +0.008" to 0
  • Cup Backface ToClear Radius 0.03"
  • Cone Backface Backing Diameter 2.09"
  • Cup Frontface Backing Diameter 3.05"
  • Cage Cone Backface Clearance 0.01"
  • Dynamic Radial Load 35400 lbf
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 25578
  • Cup Part Number 25520D
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Double Row
  • Seal Type Open
  • Cups Type Standard
  • Series 25500
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Rating(One Row 90 Million Revolutions) 5270 lbf
  • Dynamic Thrust Rating(90 Million Revolutions) 3020 lbf
  • Dynamic Radial Rating(Two Row 90 Million Revolutions) 9180 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 2.930 lb

Features

How Is 25578-25520D Bearing Engineered for Reliability?

25578-25520D Bearing features a double-row tapered roller design, providing excellent load distribution for combined radial and thrust loads.
Its chrome steel construction ensures durability and resistance to wear in demanding applications.
The bearing’s dynamic radial load capacity reaches 35,400 lbf, making it suitable for heavy-duty use.
With a standard radial clearance option, it offers flexibility for various operating conditions.

What Makes 25578-25520D Bearing Suitable for High-Temperature Applications?

25578-25520D Bearing operates reliably in temperatures ranging from -30° to 110 °C, maintaining performance in varied environments.
The chrome steel rollers and rings resist thermal expansion, ensuring consistent operation.
Its open design allows for effective lubrication, reducing friction and heat buildup.
This makes it a dependable choice for industrial applications with fluctuating temperatures.

Built for Durability: 25578-25520D Bearing

25578-25520D Bearing is constructed with high-quality chrome steel, offering long-lasting performance under heavy loads.
The double-row design enhances stability and load capacity, suitable for combined radial and thrust applications.
Precision engineering ensures smooth operation, even in challenging conditions.
Its standard radial clearance options provide adaptability for different installation requirements.

Application

Industrial Uses of 25578-25520D Bearing
The 25578-25520D Bearing is commonly used in heavy machinery like construction equipment, where its double-row design handles combined radial and thrust loads efficiently. Its chrome steel construction ensures durability in demanding environments.

What Makes 25578-25520D Bearing a Preferred Choice?
In automotive applications, 25578-25520D Bearing supports wheel hubs and differential systems, providing reliable performance under high stress. The inch sizing makes it ideal for North American vehicle models.

Built for Heavy-Duty Use: 25578-25520D Bearing
For industrial fans and pumps, 25578-25520D Bearing’s tapered roller design offers smooth operation and long service life. The open seal type allows for easy lubrication and maintenance.

Automotive vs Aerospace: Applications of 25578-25520D Bearing
In automotive systems, 25578-25520D Bearing excels in transmissions and axles, while its precision makes it suitable for aerospace landing gear components. The ABEC-1 rating ensures consistent performance.

Key Fields for 25578-25520D Bearing
The 25578-25520D Bearing is a reliable choice for agricultural machinery, where its robust design withstands harsh conditions. Its standard radial clearance adapts well to varying load demands.

Q&A

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