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34275-34478D TDO (Two-Row Double-Outer Race) (Imperial)

34275-34478D TDO (Two-Row Double-Outer Race) (Imperial)

The 34275-34478D is a two-row tapered roller bearing with a 2.76″ bore and 4.78″ outer diameter, built from sturdy chrome steel. It handles combined loads up to 40000 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.

This model is part of the 34000 series, known for reliability in heavy-duty applications. Ideal for use in industrial gearboxes or machinery where high radial and thrust loads are common.

Weighing 4.78 lb, it’s a robust choice for demanding environments. Compliant with RoHS and REACH standards, ensuring safe and eco-friendly use.

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Product Parameters

  • Part Number 34275-34478D
  • Brand TFL
  • Size 2.7559" x 4.7812" x 0.906"
  • Bore Dia 2.7559"
  • Bore Dia Tolerance +0.005" 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 3.23"
  • 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 34275
  • 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 4.780 lb

Features

Why Choose 34275-34478D Bearing for Combined Loads?

34275-34478D Bearing is built with chrome steel rings and rollers, offering strong resistance to both radial and thrust loads.
Its dynamic radial load capacity reaches 40,000 lbf, ensuring reliable performance in demanding conditions.

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

34275-34478D Bearing operates efficiently within a temperature range of -30° to 110°C.
Its steel cage maintains roller alignment, enhancing durability and reducing maintenance needs.

Application

Industrial Uses of 34275-34478D Bearing
34275-34478D Bearing is commonly used in heavy machinery, such as construction equipment and mining rigs, where its double-row design handles combined radial and thrust loads efficiently. The chrome steel construction ensures durability in tough working conditions.

Where Is 34275-34478D Bearing Used?
You’ll often find 34275-34478D Bearing in agricultural machinery, like tractors and harvesters, where its tapered roller design provides stability under varying loads. The open seal type allows for easy lubrication, extending its service life.

Built for Heavy-Duty Use: 34275-34478D Bearing
34275-34478D Bearing excels in industrial gearboxes, where its high dynamic radial load capacity keeps operations smooth. The inch sizing makes it a reliable choice for machinery requiring imperial measurements.

Automotive vs Aerospace: Applications of 34275-34478D Bearing
In automotive applications, 34275-34478D Bearing supports wheel hubs and differentials, thanks to its robust design. For aerospace, its precision and reliability make it suitable for auxiliary systems, though it’s more common in ground-based equipment.

Perfect Fit for Automation: 34275-34478D Bearing
34275-34478D Bearing is a solid choice for automated conveyor systems, where its combined load handling ensures consistent performance. The steel cage adds extra strength, making it ideal for high-use environments.

Q&A

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