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34304-34478D TDO (Two-Row Double-Outer Race) (Imperial)

34304-34478D TDO (Two-Row Double-Outer Race) (Imperial)

The 34304-34478D is a double-row tapered roller bearing with a 3.0455″ bore and 4.7812″ outer diameter, built from sturdy chrome steel. It handles combined loads up to 40000 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 34000 series, with standard cups and ABEC-1 precision. Ideal for heavy-duty applications like truck axles or industrial gearboxes where combined loads are common.

Weighing 4.07 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 34304-34478D
  • Brand TFL
  • Size 3.0455" x 4.7812" x 0.906"
  • Bore Dia 3.0455"
  • Bore Dia Tolerance +0.001" to 0
  • Outer Dia 4.7812"
  • Outer Dia Tolerance +0.001" to 0
  • Double Cup Width 1.5"
  • Double Cup Width Tolerance +0.003" to -0.01
  • Cone Width 0.906"
  • Cone Width Tolerance +0.002" to -0.01
  • Bearing Width Across Cups 2.0625"
  • Bearing Width Across Cups Tolerance +0.008" to 0
  • Cup Backface ToClear Radius 0.03"
  • Cone Backface Backing Diameter 3.54"
  • Cup Frontface Backing Diameter 4.60"
  • Cage Cone Backface Clearance 0.09"
  • Dynamic Radial Load 40000 lbf
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 34304
  • Cup Part Number 34478D
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Double Row
  • Seal Type Open
  • Cups Type Standard
  • Series 34000
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Rating(One Row 90 Million Revolutions) 5960 lbf
  • Dynamic Thrust Rating(90 Million Revolutions) 4600 lbf
  • Dynamic Radial Rating(Two Row 90 Million Revolutions) 10400 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 4.07 lb

Features

Performance Features of 34304-34478D Bearing

34304-34478D Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 40,000 lbf, ensuring reliable performance in heavy-duty applications.

The double-row tapered roller design distributes loads evenly, reducing stress and extending service life.
With a standard radial clearance, it provides smooth operation in various conditions.

34304-34478D Bearing operates efficiently within a temperature range of -30° to 110°C.
Its open design allows for easy lubrication, maintaining optimal performance over time.

The steel cage keeps the rollers aligned, minimising wear and ensuring consistent operation.
This bearing is ideal for applications requiring durability and precision under combined loads.

Application

Key Fields for 34304-34478D Bearing
In industrial settings, 34304-34478D Bearing is commonly used in heavy machinery like mining equipment and construction vehicles, where its double-row design handles combined loads efficiently. The chrome steel construction ensures durability even in demanding environments.

Where Is 34304-34478D Bearing Used?
You’ll often find 34304-34478D Bearing in automotive applications, particularly in wheel hubs and differential systems, where its tapered roller design provides smooth performance under radial and thrust loads. Its inch sizing makes it a fit for many North American vehicle models.

Built for Heavy-Duty Use: 34304-34478D Bearing
For agricultural machinery, 34304-34478D Bearing offers reliable support in tractors and harvesters, thanks to its robust steel cage and high dynamic load capacity. The open seal design allows for easy lubrication, extending its service life.

Automotive vs Aerospace: Applications of 34304-34478D Bearing
In automotive systems, 34304-34478D Bearing excels in transmissions and axles, while in aerospace, it’s suited for auxiliary equipment due to its precision and load-handling capabilities. The ABEC-1 rating ensures consistent performance across these varied applications.

What Makes 34304-34478D Bearing a Preferred Choice?
For conveyor systems in manufacturing plants, 34304-34478D Bearing stands out with its ability to manage high radial loads and moderate thrust loads. The standard radial clearance option makes it versatile for different operational needs.

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