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

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

The 399A-394D is a two-row tapered roller bearing with a 2.6875″ bore and 4.3307″ outer diameter, built from sturdy chrome steel for long-lasting performance. It handles combined loads with a dynamic radial capacity of 38700 lbf and operates smoothly in temperatures from -30°C to 110°C.

Its double-row design provides extra stability, while the open seal allows for easy lubrication. The bearing comes in standard radial clearance, with options for C3, C4, or C5 if needed.

This model is part of the 395 series, featuring a steel cage for durability. Ideal for heavy-duty applications like truck axles or industrial gearboxes where combined loads are common.

Weighing 3.61 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it’s a reliable choice for replacements or new installations.

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Product Parameters

  • Part Number 399A-394D
  • Brand TFL
  • Size 2.6875" x 4.3307" x 0.866"
  • 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 0.866"
  • Cone Width Tolerance +0.002" to -0.01
  • Bearing Width Across Cups 2.0624"
  • 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 0.05"
  • Dynamic Radial Load 38700 lbf
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 399A
  • 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 3.61 lb

Features

Performance Features of 399A-394D Bearing

399A-394D Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 38,700 lbf, ensuring reliable performance in heavy-duty applications.

The double-row tapered roller design distributes loads evenly, enhancing stability and longevity.
With a standard radial clearance, it suits various industrial needs while maintaining precision.

399A-394D Bearing operates efficiently in temperatures from -30° to 110°C, adapting to diverse environments.
The steel cage ensures proper roller alignment, reducing friction and wear over time.

Lubrication is required for optimal performance, but its robust design minimises maintenance frequency.
This bearing is ideal for applications demanding durability and consistent performance under stress.

Application

Industrial Uses of 399A-394D Bearing
The 399A-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.

Where Is 399A-394D Bearing Used?
You’ll often find the 399A-394D Bearing in agricultural machinery, like tractors and harvesters, where its tapered roller design provides reliable performance under varying loads. The inch sizing makes it a practical choice for North American equipment.

Built for Heavy-Duty Use: 399A-394D Bearing
The 399A-394D Bearing excels in industrial gearboxes, offering smooth operation even under high radial loads. Its open design simplifies lubrication, making maintenance straightforward for busy workshops.

Automotive vs Aerospace: Applications of 399A-394D Bearing
In automotive applications, the 399A-394D Bearing supports wheel hubs and differential systems, while in aerospace, it’s suited for auxiliary equipment due to its robust construction. The ABEC-1 rating ensures consistent performance across both sectors.

Practical Applications of 399A-394D Bearing
For conveyor systems in warehouses, the 399A-394D Bearing provides reliable load handling with its tapered roller design. The standard radial clearance option makes it adaptable to various operational conditions.

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