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TS (Single Row Tapered Roller Bearings) (Imperial) 39578-39520

TS (Single Row Tapered Roller Bearings) (Imperial) 39578-39520

The 39578-39520 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 and steel cage ensure durability, while the tapered rollers provide smooth operation under heavy loads. The bearing works efficiently 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, automotive systems, or heavy equipment 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 39578-39520
  • Brand TFL
  • Interchangeable Timken
  • Size 2.125" x 4.4375" x 1.1875"
  • 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 1.1875"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.14"
  • Cup Backface ToClear Radius 0.130"
  • Cone Frontface Backing Diameter 2.52"
  • Cone Backface Backing Diameter 2.76"
  • Cup Frontface Backing Diameter 4.25"
  • Cup Backface Backing Diameter 3.98"
  • 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 39520
  • 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 39578-39520 Bearing

39578-39520 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 demanding conditions.
The steel cage maintains roller alignment, reducing friction and extending operational life.
With a temperature range of -30° to 110°C, it performs well in various environments.

How Does 39578-39520 Bearing Reduce Friction?

39578-39520 Bearing’s tapered roller design minimises friction, promoting smooth operation under heavy loads.
The precision-engineered chrome steel rollers and cage ensure consistent performance.
Its dynamic thrust rating of 5,650 lbf (Ca90) highlights its efficiency in handling axial forces.
Regular lubrication further enhances its durability and reduces wear over time.

Designed for Durability: 39578-39520 Bearing

39578-39520 Bearing features a single-row construction, optimised for combined load applications.
The chrome steel components resist wear, maintaining performance even under 50,300 lbf static radial loads.
Its standard radial clearance options (C3/C4/C5) allow flexibility for different operational needs.
With an ABEC-1 rating, it balances precision and affordability.

Steel vs Ceramic Bearings: Strengths of 39578-39520 Bearing

39578-39520 Bearing uses chrome steel for both rollers and rings, ensuring cost-effective durability.
The material choice provides excellent strength, with a dynamic radial rating (C90) of 9,730 lbf.
Unlike ceramic options, it offers easier maintenance through standard lubrication practices.
Its 3.2 lb weight strikes a balance between robustness and manageable installation.

Application

Industrial Uses of 39578-39520 Bearing
39578-39520 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 conditions.

What Makes 39578-39520 Bearing a Preferred Choice?
In automotive applications, 39578-39520 Bearing fits well in wheel hubs and differential systems, providing reliable performance under varying loads. Its imperial sizing makes it a go-to for older or custom-built vehicles.

Built for Heavy-Duty Use: 39578-39520 Bearing
This bearing excels in industrial fans and pumps, where its open design allows for easy lubrication and maintenance. The steel cage adds stability, making it suitable for high-vibration environments.

Automotive vs Aerospace: Applications of 39578-39520 Bearing
While 39578-39520 Bearing is popular in truck axles and off-road vehicles, its precision also suits aerospace landing gear components. The ABEC-1 rating ensures consistent performance across both sectors.

Perfect Fit for Automation: 39578-39520 Bearing
In automated conveyor systems, 39578-39520 Bearing’s tapered rollers manage radial and thrust loads smoothly. The standard radial clearance option simplifies integration into existing setups.

Q&A

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