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

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

The 398-394YD 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 works well in temperatures ranging 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 gearboxes or machinery where combined loads are common.

Weighing 4.94 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards for safe and eco-friendly use.

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Product Parameters

  • Part Number 398-394YD
  • 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 394YD
  • 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 4.94 lb

Features

How Is 398-394YD Bearing Engineered for Reliability?

398-394YD Bearing features a double-row tapered roller design, providing strong resistance to combined radial and thrust loads.
Its chrome steel construction ensures durability, with a dynamic radial load capacity of 38,700 lbf.
The steel cage maintains roller alignment, reducing wear and extending service life.
With a standard radial clearance option, it offers flexibility for various applications.

What Makes 398-394YD Bearing Suitable for High-Temperature Applications?

398-394YD Bearing operates reliably in temperatures ranging from -30° to 110°C, making it versatile for different environments.
Its chrome steel rollers and rings maintain performance under thermal stress.
The open seal design allows for easy lubrication, ensuring smooth operation.
This bearing is ideal for industrial applications where temperature fluctuations are common.

Built for Durability: 398-394YD Bearing

398-394YD Bearing’s double-row construction enhances load distribution, reducing stress on individual rollers.
The chrome steel components resist wear, ensuring long-term reliability.
With a dynamic radial rating of 10,000 lbf for two rows, it handles heavy loads efficiently.
Its standard ABEC-1 rating balances precision and cost-effectiveness.

Steel vs Ceramic Bearings: Strengths of 398-394YD Bearing

398-394YD Bearing uses chrome steel for both rollers and rings, offering a robust and cost-effective solution.
The steel cage provides stability, ensuring consistent performance under load.
Unlike ceramic options, this bearing is easier to maintain and more widely available.
It’s a practical choice for industrial applications requiring durability and reliability.

Application

Industrial Uses of 398-394YD Bearing
The 398-394YD 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 efficiently. Its chrome steel construction ensures durability even in demanding environments.

Where Is 398-394YD Bearing Used?
You’ll often find 398-394YD Bearing in automotive applications like truck wheel hubs, where its tapered roller design provides stability under heavy loads. The inch sizing makes it a popular choice for North American vehicles.

Built for Heavy-Duty Use: 398-394YD Bearing
This bearing excels in industrial gearboxes, thanks to its robust steel cage and high dynamic load capacity. The open seal design allows for easy lubrication, extending its service life in high-speed operations.

Automotive vs Aerospace: Applications of 398-394YD Bearing
In automotive systems, 398-394YD Bearing supports wheel assemblies, while in aerospace, it’s used in landing gear mechanisms. Its ABEC-1 rating ensures reliable performance across both sectors.

Perfect Fit for Automation: 398-394YD Bearing
The 398-394YD Bearing is ideal for automated conveyor systems, where its tapered rollers reduce friction and improve efficiency. The standard radial clearance makes it easy to integrate into existing setups.

Q&A

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