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

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

The 390-394D is a two-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.

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.

With standard radial clearance and ABEC-1 precision, it’s a reliable choice for heavy-duty applications. Ideal for use in industrial machinery or automotive systems where combined loads are common.

Weighing 4.45 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards for safe and versatile use.

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Product Parameters

  • Part Number 390-394D
  • 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 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 4.450 lb

Features

How Is 390-394D Bearing Engineered for Reliability?

390-394D 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 precision-engineered cage maintains roller alignment, reducing friction and extending service life.
With a standard radial clearance and ABEC-1 rating, it offers reliable performance in various applications.

390-394D Bearing operates efficiently within a temperature range of -30° to 110°C.
Its open design allows for easy lubrication, ensuring smooth operation over time.

Application

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

Where Is 390-394D Bearing Used?
You’ll often find 390-394D 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 good fit for older or non-metric systems.

Built for Heavy-Duty Use: 390-394D Bearing
390-394D Bearing excels in industrial gearboxes, offering smooth operation even under high stress. Its open design allows for easy lubrication, extending service life in demanding applications.

Automotive vs Aerospace: Applications of 390-394D Bearing
In automotive applications, 390-394D Bearing supports wheel hubs and drivetrains, while in aerospace, it’s used in auxiliary systems where precision and reliability are key. The ABEC-1 rating ensures consistent performance.

Essential Roles of 390-394D Bearing
390-394D Bearing is vital in conveyor systems, where its ability to handle heavy loads keeps production lines running smoothly. The standard radial clearance makes it versatile for various industrial setups.

Q&A

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