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

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

The 399AX-394DC 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 is designed for long-lasting performance.

Its open design allows for easy lubrication, while the steel cage ensures smooth operation under heavy loads. The bearing works well in temperatures ranging from -30°C to 110°C.

This model is part of the 395 series, offering reliable performance in demanding applications. Ideal for industrial machinery or heavy equipment where combined radial and thrust 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-394DC
  • 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 394DC
  • 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

Performance Features of 399AX-394DC Bearing

399AX-394DC Bearing is built with chrome steel rings and rollers, offering robust performance under combined loads.
Its dynamic radial load capacity reaches 38,700 lbf, making it suitable for heavy-duty applications.
The double-row tapered roller design ensures stability and efficient load distribution.
With a temperature range of -30° to 110°C, it performs reliably in various conditions.

How Does 399AX-394DC Bearing Resist Wear?

399AX-394DC Bearing’s chrome steel construction enhances its resistance to wear and prolongs service life.
The steel cage maintains proper roller alignment, reducing friction and preventing premature failure.
Its standard radial clearance options allow for flexibility in different operational environments.
This design ensures consistent performance even under high radial and thrust loads.

Engineered for Precision: 399AX-394DC Bearing

399AX-394DC Bearing features precise tolerances, with bore diameter tolerance of +0.005″ to 0.
The double-row design provides excellent load-carrying capacity and smooth operation.
Its ABEC-1 rating ensures reliable performance for general industrial applications.
The bearing’s construction allows for easy lubrication, maintaining optimal performance over time.

Steel vs Ceramic Bearings: Strengths of 399AX-394DC Bearing

399AX-394DC Bearing uses chrome steel for both rings and rollers, offering durability and cost-effectiveness.
The steel cage provides strong support, ensuring the rollers move smoothly under load.
With a dynamic radial rating of 10,000 lbf for two rows, it handles heavy loads efficiently.
Its standard radial clearance makes it versatile for various industrial uses.

Application

Industrial Uses of 399AX-394DC Bearing
The 399AX-394DC 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 efficiently. Its chrome steel construction ensures durability in harsh environments.

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

Built for Heavy-Duty Use: 399AX-394DC Bearing
399AX-394DC Bearing excels in industrial gearboxes, offering smooth operation even under high stress. Its open design allows for easy lubrication, extending service life in demanding applications.

Automotive vs Aerospace: Applications of 399AX-394DC Bearing
In automotive applications, 399AX-394DC Bearing supports axle systems, while in aerospace, it’s used in landing gear assemblies. Its ABEC-1 rating ensures consistent performance across both sectors.

Perfect Fit for Automation: 399AX-394DC Bearing
399AX-394DC Bearing is ideal for robotic arms and conveyor systems in automated factories. The steel cage and chrome steel rollers provide stability and reduce wear over time.

Q&A

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