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TS (Single Row Tapered Roller Bearings) (Imperial) 39578-39521

TS (Single Row Tapered Roller Bearings) (Imperial) 39578-39521

The 39578-39521 is a single-row tapered roller bearing with a 2.125″ bore and 4.4375″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 37500 lbf radially and 5650 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 industrial machinery, gearboxes, or automotive systems where combined loads are common.

Weighing 3.2 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it meets safety and environmental requirements.

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Product Parameters

  • Part Number 39578-39521
  • Brand TFL
  • Interchangeable Timken
  • Size 2.125" x 4.4375" x 1.1876"
  • Bore Dia 2.125"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 4.4375"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 1.1875"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 0.9375"
  • Cup Width Tolerance +0.002" to -0.01
  • Width 1.1876"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.14"
  • Cup Backface ToClear Radius 0.03"
  • Cone Frontface Backing Diameter 2.52"
  • Cone Backface Backing Diameter 2.76"
  • Cup Frontface Backing Diameter 4.25"
  • Cup Backface Backing Diameter 4.06"
  • Cage Cone Frontface Clearance 0.13"
  • Cage Cone Backface Clearance 0.05"
  • Effective Center Location -0.26"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 39578
  • Cup Part Number 39521
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Cups Type Standard
  • Series 39500
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 37500 lbf
  • Static Radial Load 50300 lbf
  • Dynamic Radial Rating(90 Million Revolutions)(C90) 9730 lbf
  • Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 5650 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 3.2 lb

Features

Performance Features of 39578-39521 Bearing

39578-39521 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 37,500 lbf, ensuring reliable performance in heavy-duty applications.
The steel cage maintains roller alignment, reducing friction and extending service life.
With a temperature range of -30° to 110°C, it performs well in various operating conditions.

How Is 39578-39521 Bearing Engineered for Reliability?

39578-39521 Bearing features a single-row tapered roller design, optimised for handling combined loads.
The chrome steel construction provides durability, while the standard radial clearance ensures smooth operation.
Its dynamic thrust rating of 5,650 lbf makes it suitable for demanding industrial uses.
The open seal type allows for easy lubrication, maintaining performance over time.

Built for Durability: 39578-39521 Bearing

39578-39521 Bearing’s tapered roller design distributes loads evenly, enhancing its longevity.
The chrome steel components resist wear, even under high radial and thrust loads.
With a static radial load capacity of 50,300 lbf, it excels in heavy industrial applications.
Its ABEC-1 rating ensures consistent precision and reliability in operation.

Application

Industrial Uses of 39578-39521 Bearing
39578-39521 Bearing is commonly used in heavy machinery like construction equipment and agricultural gear, where its tapered roller design handles combined loads efficiently. The chrome steel construction ensures durability even in tough working conditions.

What Makes 39578-39521 Bearing a Preferred Choice?
In automotive applications, 39578-39521 Bearing fits well in wheel hubs and differential systems, thanks to its precise inch measurements and compatibility with Timken designs. Its open seal type allows for easy lubrication, extending service life.

Built for Heavy-Duty Use: 39578-39521 Bearing
For industrial conveyor systems, 39578-39521 Bearing offers reliable performance with its high dynamic radial load capacity. The steel cage adds stability, making it suitable for continuous operation.

Automotive vs Aerospace: Applications of 39578-39521 Bearing
While 39578-39521 Bearing excels in automotive drivetrains, its ABEC-1 rating also makes it a practical choice for aerospace auxiliary systems. The temperature range ensures performance in varied environments.

Essential Roles of 39578-39521 Bearing
In mining equipment, 39578-39521 Bearing’s static radial load capacity of 50300 lbf supports heavy-duty operations. The standard radial clearance options provide flexibility for different installation needs.

Q&A

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