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390-394YD TDO (Two-Row Double-Outer Race) (Imperial)

390-394YD TDO (Two-Row Double-Outer Race) (Imperial)

The 390-394YD is a double-row tapered roller bearing with a 2.25″ 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 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, with options for C3, C4, or C5 available. It’s ideal for heavy-duty applications like industrial machinery or vehicle axles where combined loads are common.

Weighing 4.52 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 390-394YD
  • Brand TFL
  • Size 2.25" x 4.3307" x 0.866"
  • Bore Dia 2.25"
  • 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 2.76"
  • 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 390
  • 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 4.52 lb

Features

Performance Features of 390-394YD Bearing

390-394YD 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 enhances stability and load distribution.
With a standard radial clearance, it provides smooth operation in various conditions.

390-394YD Bearing operates efficiently within a temperature range of -30° to 110°C.
Its steel cage maintains roller alignment, reducing wear and extending service life.

The open design simplifies lubrication, ensuring consistent performance over time.
This bearing is ideal for applications requiring durability and precision.

Application

Industrial Uses of 390-394YD Bearing
390-394YD 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 effectively. The chrome steel construction ensures durability in tough working conditions.

Where Is 390-394YD Bearing Used?
You’ll often find 390-394YD Bearing in automotive applications like truck wheel hubs, where its tapered roller design provides stability under heavy loads. The inch sizing makes it a good fit for American-made vehicles.

Built for Heavy-Duty Use: 390-394YD Bearing
390-394YD Bearing excels in industrial gearboxes, thanks to its high dynamic radial load capacity. The open seal type allows for easy lubrication, extending its service life in demanding environments.

Automotive vs Aerospace: Applications of 390-394YD Bearing
In automotive systems, 390-394YD Bearing supports wheel hubs and axles, while in aerospace, it’s used in landing gear mechanisms. Its ABEC-1 rating ensures reliable performance in both sectors.

Practical Applications of 390-394YD Bearing
390-394YD Bearing is a solid choice for agricultural machinery, like tractors, where its tapered rollers handle uneven loads smoothly. The steel cage adds extra strength for long-term use.

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