TS (Single Row Tapered Roller Bearings) (Imperial) 3979-3927X

The 3979-3927X is a single-row tapered roller bearing with a 2.25″ bore and 4.3307″ 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, suitable for demanding environments.

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 2.8 lb, it balances strength and manageability. Compliant with RoHS and REACH standards, it meets safety and environmental requirements. The ABEC-1 rating ensures consistent performance for general applications.

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Description

Features

Application

Q&A

Product Parameters

Part Number 3979-3927X
Brand TFL
Interchangeable Timken
Size 2.25" x 4.3307" x 1.1876"
Bore Dia 2.25"
Bore Dia Tolerance +0.005" to 0
Outer Dia 4.3307"
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 0.130"
Cone Frontface Backing Diameter 2.6"
Cone Backface Backing Diameter 2.83"
Cup Frontface Backing Diameter 4.15"
Cup Backface Backing Diameter 3.90"
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 3979
Cup Part Number 3927X
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 2.8 lb

Features

How Is 3979-3927X Bearing Engineered for Reliability?

3979-3927X Bearing features chrome steel rings and rollers, ensuring strength and durability under combined loads.
Its dynamic radial load capacity reaches 31,200 lbf, making it suitable for heavy-duty applications.
The steel cage maintains proper roller alignment, reducing friction and extending service life.
With a temperature range of -30° to 110°C, it performs reliably in various operating conditions.

Structural Advantages of 3979-3927X Bearing

3979-3927X Bearing’s tapered roller design efficiently handles both radial and thrust loads.
The precise cone and cup width tolerances ensure smooth operation and easy installation.
Its standard radial clearance options provide flexibility for different application needs.
The open seal type allows for easy lubrication, enhancing performance and longevity.

Why Choose 3979-3927X Bearing for Precision Tasks?

3979-3927X Bearing’s ABEC-1 rating ensures consistent performance in precision applications.
The chrome steel construction resists wear, maintaining accuracy over extended periods.
With a dynamic thrust rating of 5,570 lbf, it balances precision and load capacity.
Its effective center location design contributes to stable and reliable operation.

Application

Industrial Uses of 3979-3927X Bearing
The 3979-3927X Bearing is commonly used in heavy machinery, such as construction equipment and mining tools, where its tapered roller design handles combined loads efficiently.
Its chrome steel construction ensures durability even in demanding environments, making it a reliable choice for long-term use.

Where Is 3979-3927X Bearing Used?
You’ll often find the 3979-3927X Bearing in automotive applications like truck wheel hubs, where its ability to manage radial and thrust loads is essential.
The inch sizing makes it compatible with many North American vehicle models, simplifying replacements and repairs.

Built for Heavy-Duty Use: 3979-3927X Bearing
In industrial gearboxes, the 3979-3927X Bearing provides stable performance under high loads, thanks to its robust steel cage and tapered rollers.
The open design allows for easy lubrication, extending its lifespan in continuous operation scenarios.

Automotive vs Aerospace: Applications of 3979-3927X Bearing
While the 3979-3927X Bearing is popular in automotive systems like differentials, it’s also suited for aerospace ground support equipment.
The bearing’s temperature range and load capacity make it versatile across different industries without compromising reliability.