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

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

The 398-394DC is a double-row tapered roller bearing with a 2-inch bore and 4.3307-inch 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 open design allows for easy lubrication, while the steel cage ensures smooth operation. The bearing can withstand temperatures from -30°C to 110°C, making it versatile for various environments.

This model features a standard radial clearance and is ABEC-1 rated for reliable precision. Ideal for heavy-duty applications like industrial machinery or vehicle axles where both radial and thrust loads are present.

Weighing 4.870 lb, it’s a robust choice for high-load scenarios. Compliant with RoHS and REACH standards, it’s a safe and durable option for replacement or new installations.

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Product Parameters

  • Part Number 398-394DC
  • 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 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 4.870 lb

Features

How Is 398-394DC Bearing Engineered for Reliability?

398-394DC Bearing features a double-row tapered roller design, providing strong resistance to combined loads.
Its chrome steel construction ensures durability, with a dynamic radial load capacity of 38,700 lbf.

The precision-engineered cage keeps rollers aligned, reducing friction and extending service life.
With a temperature range of -30° to 110°C, it performs reliably in various conditions.

398-394DC Bearing’s standard radial clearance allows for smooth operation in demanding applications.
Its open design simplifies maintenance, ensuring long-term performance with proper lubrication.

Application

Industrial Uses of 398-394DC Bearing
The 398-394DC 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 effectively. Its chrome steel construction ensures durability in demanding environments.

In automotive applications, 398-394DC Bearing supports wheel hubs and drivetrain components, providing reliable performance under varying load conditions. The imperial sizing makes it a practical choice for North American vehicle models.

For industrial automation, 398-394DC Bearing’s open design allows for easy lubrication, ensuring smooth operation in conveyor systems and robotic arms. The steel cage enhances stability during high-speed rotations.

Where Is 398-394DC Bearing Used?
You’ll often find 398-394DC Bearing in agricultural machinery, where its tapered roller design handles uneven loads from tillers and harvesters. The standard radial clearance ensures consistent performance in dusty conditions.

In material handling systems, 398-394DC Bearing’s two-row construction supports heavy loads in forklifts and cranes. The inch measurements make it compatible with older equipment still using imperial standards.

Built for Heavy-Duty Use: 398-394DC Bearing
The 398-394DC Bearing excels in forestry equipment, such as log splitters and sawmills, thanks to its robust chrome steel rollers. Its open design simplifies maintenance in rugged outdoor settings.

For railway applications, 398-394DC Bearing’s combined load capacity makes it ideal for axle boxes and bogies. The ABEC-1 rating ensures reliable performance without over-engineering for most rail systems.

Automotive vs Aerospace: Applications of 398-394DC Bearing
In automotive systems, 398-394DC Bearing is often used in truck differentials, where its tapered rollers manage heavy torque loads. The steel cage prevents deformation under stress.

For aerospace ground equipment, 398-394DC Bearing supports landing gear test rigs and cargo loaders. Its temperature range (-30° to 110°C) covers most operational conditions.

Q&A

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