399AX-394YD TDO (Two-Row Double-Outer Race) (Imperial)

The 399AX-394YD is a two-row tapered roller bearing with a 2.6875″ bore and 4.3307″ outer diameter, built from sturdy chrome steel. It handles combined loads up to 38700 lbf and is designed for long-lasting performance.

Its double-row construction provides extra stability, while the open design allows for easy lubrication. The bearing operates smoothly in temperatures ranging from -30°C to 110°C.

This model is part of the 395 series and comes with standard cups for straightforward installation. Ideal for heavy-duty applications like truck axles or industrial gearboxes where combined loads are common.

Weighing 4.57 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, ensuring safe and reliable use.

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Description

Features

Application

Q&A

Product Parameters

Part Number 399AX-394YD
Brand TFL
Size 2.6875" x 4.3307" x 1.431"
Bore Dia 2.6875"
Bore Dia Tolerance +0.005" to 0
Outer Dia 4.3307"
Outer Dia Tolerance +0.001" to 0
Double Cup Width 1.8125"
Double Cup Width Tolerance +0.003" to -0.01
Cone Width 1.431"
Cone Width Tolerance +0.002" to -0.01
Bearing Width Across Cups 3.1924"
Bearing Width Across Cups Tolerance +0.008" to 0
Cup Backface ToClear Radius 0.03"
Cone Backface Backing Diameter 3.07"
Cup Frontface Backing Diameter 4.12"
Cage Cone Backface Clearance 0.61"
Dynamic Radial Load 38700 lbf
System of Measurement Inch
Type Bearing
Cone Part Number 399AX
Cup Part Number 394YD
Bearing Type Roller
Roller Bearing Type Tapered
For Load Direction Combined
Construction Double Row
Seal Type Open
Cups Type Standard
Series 395
Ring Material Chrome Steel
Roller Material Chrome Steel
Cage Material Steel
Dynamic Radial Rating(One Row 90 Million Revolutions) 5760 lbf
Dynamic Thrust Rating(90 Million Revolutions) 3970 lbf
Dynamic Radial Rating(Two Row 90 Million Revolutions) 10000 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 4.57 lb

Features

How Does 399AX-394YD Bearing Handle Combined Loads?

399AX-394YD Bearing is built with chrome steel rings and rollers, offering strong resistance to both radial and thrust loads.
Its dynamic radial load capacity reaches 38,700 lbf, ensuring reliable performance in demanding applications.
The steel cage keeps the rollers aligned, reducing wear and extending service life.
With a temperature range of -30° to 110°C, it performs well in various environments.

What Makes 399AX-394YD Bearing Durable?

399AX-394YD Bearing features a double-row tapered roller design, providing enhanced load distribution.
The chrome steel construction ensures resistance to wear and tear, even under heavy loads.
Its standard radial clearance allows for smooth operation in various applications.
The bearing’s open design simplifies maintenance, reducing downtime.

Engineered for Precision: 399AX-394YD Bearing

399AX-394YD Bearing’s precise tolerances ensure consistent performance in combined load scenarios.
The tapered roller design minimises friction, promoting efficient operation.
With an ABEC-1 rating, it meets standard precision requirements for industrial use.
The bearing’s lubrication requirement ensures long-term reliability.

Structural Advantages of 399AX-394YD Bearing

399AX-394YD Bearing’s double-row construction provides stability under varying load conditions.
The chrome steel rollers and rings offer excellent durability in harsh environments.
Its standard cup type design allows for easy installation and replacement.
The bearing’s weight of 4.57 lb balances strength and manageability.

Application

Industrial Uses of 399AX-394YD Bearing
The 399AX-394YD Bearing is commonly used in heavy machinery, such as construction equipment and mining tools, where its double-row design handles combined radial and thrust loads efficiently. Its chrome steel construction ensures durability in demanding environments.

Where Is 399AX-394YD Bearing Used?
You’ll often find 399AX-394YD Bearing in agricultural machinery, like tractors and harvesters, where its tapered roller design provides stability under heavy loads. The inch sizing makes it a good fit for North American equipment standards.

Built for Heavy-Duty Use: 399AX-394YD Bearing
This bearing excels in industrial gearboxes, offering reliable performance even under high stress. The open seal type allows for easy lubrication, extending its service life in continuous operation.

Automotive vs Aerospace: Applications of 399AX-394YD Bearing
In automotive applications, 399AX-394YD Bearing supports axles and wheel hubs, while in aerospace, it’s used in auxiliary systems requiring precise load management. Its ABEC-1 rating ensures consistent performance.

Practical Applications of 399AX-394YD Bearing
For conveyor systems, 399AX-394YD Bearing’s tapered rollers handle both radial and axial forces smoothly. The standard radial clearance makes it versatile for various industrial setups.