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TS (Single Row Tapered Roller Bearings) (Imperial) 8578-8520

TS (Single Row Tapered Roller Bearings) (Imperial) 8578-8520

The 8578-8520 is a single-row tapered roller bearing with a 9.5″ bore and 12.875″ outer diameter, built from sturdy chrome steel. It handles combined loads up to 119,000 lbf radially and 21,400 lbf thrust, making it suitable for heavy-duty applications.

Its open design allows for easy lubrication, while the steel cage ensures durability under high stress. 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 use in industrial machinery, construction equipment, or automotive systems where robust performance is needed.

Weighing 25 lb, it’s a solid choice for applications requiring long-lasting strength. Compliant with RoHS and REACH standards for safe and reliable use.

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Product Parameters

  • Part Number 8578-8520
  • Brand TFL
  • Interchangeable Timken
  • Size 9.5" x 12.875" x 2.0625"
  • Bore Dia 9.5"
  • Bore Dia Tolerance +0.001" to 0
  • Outer Dia 12.875"
  • Outer Dia Tolerance +0.002" to 0
  • Cone Width 2.0625"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 1.4375"
  • Cup Width Tolerance +0.002" to -0.01
  • Width 2.0625"
  • Width Tolerance +0.014" to -0.01"
  • Cone Backface ToClear Radius 0.25"
  • Cup Backface ToClear Radius 0.130"
  • Cone Frontface Backing Diameter 11.14"
  • Cone Backface Backing Diameter 10.39"
  • Cup Frontface Backing Diameter 12.40"
  • Cup Backface Backing Diameter 12.01"
  • Cage Cone Frontface Clearance 0.13"
  • Cage Cone Backface Clearance 0.24"
  • Effective Center Location 0.3"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 8578
  • Cup Part Number 8520
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Cups Type Standard
  • Series 8500
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 119000 lbf
  • Static Radial Load 240000 lbf
  • Dynamic Radial Rating(90 Million Revolutions)(C90) 30700 lbf
  • Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 21400 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 25 lb

Features

Performance Features of 8578-8520 Bearing

8578-8520 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 119,000 lbf, making it suitable for heavy-duty applications.

The single-row tapered roller design ensures smooth operation and efficient load distribution.
With a static radial load of 240,000 lbf, it provides reliable performance in demanding conditions.

8578-8520 Bearing operates within a temperature range of -30° to 110°C, ensuring versatility.
The standard radial clearance options allow for flexibility in various industrial applications.

The steel cage maintains roller alignment, reducing wear and extending service life.
Its ABEC-1 rating ensures consistent precision for general engineering needs.

Application

Industrial Uses of 8578-8520 Bearing
8578-8520 Bearing is commonly used in heavy machinery like mining equipment and construction vehicles, where its tapered roller design handles combined radial and thrust loads efficiently. The chrome steel construction ensures durability even in tough working conditions.

Where Is 8578-8520 Bearing Used?
You’ll often find 8578-8520 Bearing in agricultural machinery, such as tractors and harvesters, where its robust design supports high loads. Its inch sizing makes it a good fit for North American equipment standards.

Built for Heavy-Duty Use: 8578-8520 Bearing
8578-8520 Bearing excels in industrial gearboxes, providing reliable performance under continuous operation. The open design allows for easy lubrication, extending its service life in demanding environments.

Automotive vs Aerospace: Applications of 8578-8520 Bearing
In automotive applications, 8578-8520 Bearing is used in truck wheel hubs, offering stability under heavy loads. While not typical for aerospace, its precision makes it suitable for certain ground support equipment.

Practical Applications of 8578-8520 Bearing
8578-8520 Bearing is a solid choice for conveyor systems in manufacturing plants, where its tapered rollers manage both radial and axial forces. The steel cage adds extra strength for long-term use.

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