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398-394D TDO (Two-Row Double-Outer Race) (Imperial)

398-394D TDO (Two-Row Double-Outer Race) (Imperial)

The 398-394D is a two-row tapered roller bearing with a 2″ 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 in demanding conditions.

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 industrial gearboxes or large machinery where both radial and thrust loads are present.

Weighing 4.870 lb, it’s a robust choice for imperial-sized systems. Compliant with RoHS and REACH standards for safe and reliable use.

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Product Parameters

  • Part Number 398-394D
  • Brand TFL
  • Size 2" x 4.3307" x 0.866"
  • Bore Dia 2"
  • 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 2.44"
  • 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 398
  • 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 4.870 lb

Features

Why Choose 398-394D Bearing for Combined Loads?

398-394D Bearing features 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 precision-engineered cage maintains roller alignment, reducing friction and extending service life.
With a standard radial clearance, it offers reliable performance in various industrial applications.

398-394D Bearing operates within a temperature range of -30° to 110°C, suitable for diverse environments.
Its open design allows for easy lubrication, ensuring smooth operation over long periods.

Application

Industrial Uses of 398-394D Bearing
The 398-394D Bearing is commonly used in heavy machinery like construction equipment and agricultural vehicles, where its double-row design handles combined radial and thrust loads efficiently. Its chrome steel construction ensures durability even in demanding environments.

In automotive applications, 398-394D Bearing supports wheel hubs and differential systems, providing reliable performance under varying loads. The inch sizing makes it a preferred choice for American-made vehicles and machinery.

For industrial automation, 398-394D Bearing’s open design allows for easy lubrication, extending its service life in conveyor systems and robotic arms. The standard radial clearance offers flexibility for different operational needs.

Where Is 398-394D Bearing Used?
You’ll often find 398-394D Bearing in mining equipment, where its tapered roller design manages heavy radial and axial loads effortlessly. The steel cage adds extra strength, making it suitable for high-stress conditions.

In wind turbines, 398-394D Bearing’s ability to handle dynamic loads makes it ideal for rotor shafts. The ABEC-1 rating ensures consistent performance without unnecessary precision costs.

Built for Heavy-Duty Use: 398-394D Bearing
The 398-394D Bearing excels in forestry machinery, where its robust construction withstands rough terrain and shock loads. The double-row setup distributes forces evenly, reducing wear over time.

For railway applications, 398-394D Bearing’s tapered rollers provide smooth operation in axle boxes. Its temperature range of -30° to 110°C ensures reliability in diverse climates.

Automotive vs Aerospace: Applications of 398-394D Bearing
In automotive systems, 398-394D Bearing is trusted for drivetrain components due to its load capacity and ease of maintenance. The inch measurements simplify replacements in older models.

While not typically used in aerospace, 398-394D Bearing’s reliability makes it suitable for ground support equipment. Its compliance with RoHS and REACH standards adds an eco-friendly advantage.

Q&A

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