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TS (Single Row Tapered Roller Bearings) (Imperial) 3981-3925

TS (Single Row Tapered Roller Bearings) (Imperial) 3981-3925

The 3981-3925 is a single-row tapered roller bearing with a 2.3125″ bore and 4.4375″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 31200 lbf radially and 5570 lbf thrust, making it versatile for various applications.

Its open design allows 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 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it’s a safe and dependable choice.

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Product Parameters

  • Part Number 3981-3925
  • Brand TFL
  • Interchangeable Timken
  • Size 2.3125" x 4.4375" x 1.1876"
  • Bore Dia 2.3125"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 4.4375"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 1.183"
  • 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 2.64"
  • Cone Backface Backing Diameter 2.87"
  • Cup Frontface Backing Diameter 4.18"
  • Cup Backface Backing Diameter 3.98"
  • Cage Cone Frontface Clearance 0.08"
  • Cage Cone Backface Clearance 0.06"
  • Effective Center Location -0.18"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 3981
  • Cup Part Number 3925
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Cups Type Standard
  • Series 3900
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 31200 lbf
  • Static Radial Load 43000 lbf
  • Dynamic Radial Rating(90 Million Revolutions)(C90) 8090 lbf
  • Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 5570 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 lb

Features

Performance Features of 3981-3925 Bearing

3981-3925 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 31,200 lbf, ensuring reliable performance in demanding conditions.
The steel cage maintains proper roller alignment, reducing friction and extending operational life.
With a temperature range of -30° to 110°C, it performs well in various environments.

How Is 3981-3925 Bearing Engineered for Reliability?

3981-3925 Bearing features a tapered roller design, optimised for handling both radial and thrust loads.
The chrome steel construction enhances durability, even under heavy stress.
Its standard radial clearance allows for smooth operation, reducing wear over time.
Lubrication is required to maintain peak performance and longevity.

Built for Durability: 3981-3925 Bearing

3981-3925 Bearing’s single-row construction ensures stability and efficient load distribution.
The precise tolerances in bore and outer diameters guarantee a secure fit in applications.
With an ABEC-1 rating, it balances precision and cost-effectiveness.
Its open design simplifies maintenance, though regular lubrication is recommended.

Steel vs Ceramic Bearings: Strengths of 3981-3925 Bearing

3981-3925 Bearing uses chrome steel for both rollers and rings, providing excellent strength and wear resistance.
Unlike ceramic options, it offers a more cost-effective solution for heavy-duty applications.
The steel cage ensures reliable performance under high dynamic loads.
This makes it a practical choice for industrial machinery and automotive uses.

Application

Industrial Uses of 3981-3925 Bearing
The 3981-3925 Bearing is commonly used in heavy machinery, such as construction equipment and agricultural gear, where its tapered roller design handles combined loads effectively. Its chrome steel construction ensures durability even in demanding environments.

In automotive applications, 3981-3925 Bearing fits well in wheel hubs and drivetrains, providing reliable performance under both radial and thrust loads. The imperial sizing makes it a straightforward replacement for Timken equivalents in older vehicles.

For industrial conveyor systems, 3981-3925 Bearing’s open design simplifies lubrication and maintenance, reducing downtime. The steel cage adds stability, making it suitable for high-load scenarios.

Where Is 3981-3925 Bearing Used?
You’ll often find 3981-3925 Bearing in mining equipment, where its robust design withstands harsh conditions. The tapered rollers distribute loads evenly, extending service life.

In manufacturing plants, this bearing supports heavy-duty presses and gearboxes, thanks to its high dynamic radial load capacity. The ABEC-1 rating ensures consistent performance for general industrial use.

Built for Heavy-Duty Use: 3981-3925 Bearing
The 3981-3925 Bearing excels in applications like forestry machinery, where shock loads are common. Its chrome steel rollers and rings resist wear, even under continuous stress.

For railway applications, this bearing’s effective center location helps maintain alignment in bogies and axles. The standard radial clearance option allows for easy integration into existing systems.

Automotive vs Aerospace: Applications of 3981-3925 Bearing
In automotive settings, 3981-3925 Bearing is ideal for truck axles, balancing radial and thrust loads efficiently. Its compatibility with Timken designs simplifies sourcing for repairs.

While not typically used in aerospace, this bearing suits ground support equipment like tugs and loaders. The temperature range of -30° to 110°C covers most operational needs.

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