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399AS-394YD TDO (Two-Row Double-Outer Race) (Imperial)

399AS-394YD TDO (Two-Row Double-Outer Race) (Imperial)

The 399AS-394YD is a double-row tapered roller bearing with a 2.6875″ 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 open design allows easy lubrication, while the steel cage ensures smooth operation. The bearing works in temperatures from -30°C to 110°C, making it versatile for various conditions.

This model is part of the 395 series and comes with standard radial clearance. It’s ideal for heavy-duty applications like industrial gearboxes or vehicle axles where combined loads are common.

Weighing 3.6 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 399AS-394YD
  • Brand TFL
  • Size 2.6875" x 4.3307" x 0.866"
  • Bore Dia 2.6875"
  • 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 3.27"
  • 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 399AS
  • 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 3.600 lb

Features

How Does 399AS-394YD Bearing Handle Combined Loads?

399AS-394YD Bearing features a double-row tapered roller design, ideal for handling both 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 friction and extending bearing life.
With a standard radial clearance, it offers reliable performance in various industrial applications.

What Makes 399AS-394YD Bearing Suitable for High-Temperature Applications?

399AS-394YD Bearing operates efficiently in temperatures ranging from -30° to 110°C.
Its chrome steel rings and rollers resist thermal deformation, ensuring consistent performance.
The open design allows for proper lubrication, preventing overheating during prolonged use.
This makes it a dependable choice for demanding environments.

Engineered for Precision: 399AS-394YD Bearing

399AS-394YD Bearing is designed with tight tolerances, ensuring precise fit and alignment.
The double-row configuration provides stability, reducing vibration in high-speed applications.
Its standard radial clearance and ABEC-1 rating make it suitable for general industrial use.
The tapered roller design ensures smooth operation under combined loads.

Structural Advantages of 399AS-394YD Bearing

399AS-394YD Bearing’s double-row construction enhances load distribution, minimising wear.
The chrome steel components offer excellent resistance to fatigue and deformation.
With a dynamic radial rating of 10,000 lbf for two rows, it handles heavy-duty tasks effortlessly.
Its open design simplifies lubrication, ensuring long-term reliability.

Application

Industrial Uses of 399AS-394YD Bearing
The 399AS-394YD 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 efficiently. Its chrome steel construction ensures durability in demanding environments.

Where Is 399AS-394YD Bearing Used?
You’ll often find the 399AS-394YD Bearing in agricultural machinery, like tractors and harvesters, where its tapered roller design provides reliable performance under varying loads. The open seal type allows for easy lubrication, extending its service life.

Built for Heavy-Duty Use: 399AS-394YD Bearing
In industrial gearboxes, the 399AS-394YD Bearing excels due to its high dynamic radial load capacity. The steel cage adds strength, making it suitable for continuous operation in harsh conditions.

Automotive vs Aerospace: Applications of 399AS-394YD Bearing
In automotive applications, the 399AS-394YD Bearing supports wheel hubs and differentials, offering stability under heavy loads. For aerospace, its precision and reliability make it a trusted choice in landing gear systems.

Practical Applications of 399AS-394YD Bearing
The 399AS-394YD Bearing is ideal for conveyor systems in manufacturing plants, where its combined load capability ensures smooth operation. Its inch sizing makes it compatible with a wide range of North American machinery.

Q&A

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