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

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

The 399AX-394D is a double-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 works well in temperatures from -30°C to 110°C.

Its open design allows for easy lubrication, while the steel cage ensures durability. The bearing is designed for standard radial clearance, with options for C3, C4, or C5 available.

This model is part of the 395 series, offering reliable performance in heavy-duty applications. Ideal for machinery like gearboxes or industrial equipment where combined loads are common.

Weighing 4.5 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards for safe use.

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Product Parameters

  • Part Number 399AX-394D
  • 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 394D
  • 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 4.5 lb

Features

Why Choose 399AX-394D Bearing for Combined Loads?

399AX-394D Bearing is built with a double-row tapered roller design, handling both radial and thrust loads efficiently.
Its chrome steel construction ensures durability, with a dynamic radial load capacity of 38,700 lbf.
The steel cage maintains roller alignment, reducing friction and extending bearing life.
With a standard radial clearance, it offers reliable performance in various applications.

How Is 399AX-394D Bearing Engineered for Reliability?

399AX-394D Bearing features precision-machined chrome steel rollers and rings for consistent performance.
Its double-row design distributes loads evenly, enhancing stability under heavy-duty conditions.
The bearing operates smoothly within a temperature range of -30° to 110°C.
Steel cage construction ensures minimal wear, even in demanding environments.

Built for Durability: 399AX-394D Bearing

399AX-394D Bearing’s chrome steel components resist wear, making it suitable for long-term use.
Its tapered roller design reduces friction, improving efficiency and load distribution.
The bearing meets ABEC-1 standards, ensuring consistent quality and performance.
With a weight of 4.5 lb, it balances strength and practicality for industrial applications.

Application

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

In automotive applications, 399AX-394D Bearing supports wheel hubs and differential systems, providing reliable performance under varying load conditions. The imperial sizing makes it a suitable choice for North American vehicle models.

For industrial automation, 399AX-394D Bearing’s open design allows for easy lubrication, ensuring smooth operation in conveyor systems and robotic arms. The standard radial clearance offers flexibility for different operational needs.

What Makes 399AX-394D Bearing a Preferred Choice?
The 399AX-394D Bearing stands out in agricultural machinery, where its tapered roller design manages heavy loads in tractors and harvesters. Its steel cage adds strength while maintaining smooth rotation.

In material handling systems, 399AX-394D Bearing’s two-row configuration provides stability for lifting equipment like cranes and forklifts. The ABEC-1 rating ensures consistent performance without unnecessary precision costs.

Built for Heavy-Duty Use: 399AX-394D Bearing
The 399AX-394D Bearing excels in forestry equipment, such as log splitters and sawmills, thanks to its robust construction and high dynamic load capacity. Its temperature range suits both cold and moderate climates.

For railway applications, 399AX-394D Bearing’s combined load capability makes it ideal for axle boxes and bogies. The inch measurements align with standard rail component specifications.

Automotive vs Aerospace: Applications of 399AX-394D Bearing
In automotive drivetrains, 399AX-394D Bearing handles the stresses of gearboxes and driveshafts, offering longevity and ease of maintenance. The open seal type simplifies inspection and relubrication.

For aerospace ground support equipment, 399AX-394D Bearing’s reliability ensures smooth operation in aircraft tugs and loading systems. Its weight-to-load ratio balances performance and portability.

Q&A

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