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34307-34478D TDO (Two-Row Double-Outer Race) (Imperial)

34307-34478D TDO (Two-Row Double-Outer Race) (Imperial)

The 34307-34478D is a double-row tapered roller bearing with a 3.0625″ bore and 4.7812″ outer diameter, built from sturdy chrome steel for long-lasting performance.
It handles combined loads with a dynamic radial capacity of 40000 lbf and works smoothly in temperatures from -30°C to 110°C.
Its open design allows easy lubrication, while the steel cage ensures durability under heavy use.
This bearing is ideal for industrial gearboxes or heavy machinery where both radial and thrust loads are present.
Weighing 3.9 lb, it’s robust yet manageable for its size, and complies with RoHS and REACH standards.

The bearing features a standard radial clearance and is rated ABEC-1, making it a reliable choice for general industrial applications.
Its double-row design provides extra stability, distributing loads evenly across both rows of rollers.
The tapered rollers ensure smooth rotation even under high stress, reducing friction and wear.
Perfect for use in construction equipment or agricultural machinery, where durability and performance are key.
With its inch measurements, it’s compatible with imperial system machinery and easy to replace when needed.

Maintenance is straightforward thanks to its open seal type, allowing for regular greasing to keep it running smoothly.
The bearing’s chrome steel construction resists wear, extending its lifespan in demanding environments.
Its dynamic thrust rating of 4600 lbf makes it suitable for applications with axial loads.
Whether in mining equipment or conveyor systems, this bearing delivers consistent performance.
Compliant with industry standards, it’s a dependable option for engineers and maintenance teams alike.

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Product Parameters

  • Part Number 34307-34478D
  • Brand TFL
  • Size 3.0625" x 4.7812" x 0.906"
  • Bore Dia 3.0625"
  • 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 3.78"
  • 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 34307
  • 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 3.9 lb

Features

Performance Features of 34307-34478D Bearing

34307-34478D Bearing is built with chrome steel rings and rollers, offering robust 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 enhances stability and load distribution, reducing wear over time.
With a standard radial clearance, it provides smooth operation in various industrial settings.

34307-34478D Bearing operates efficiently within a temperature range of -30° to 110°C.
Its steel cage maintains roller alignment, contributing to extended service life and reduced maintenance needs.

Application

Industrial Uses of 34307-34478D Bearing
34307-34478D Bearing is commonly used in heavy machinery like construction equipment, where its double-row design handles combined radial and thrust loads effectively. The chrome steel construction ensures durability in tough environments.

In automotive applications, 34307-34478D Bearing supports wheel hubs and differential systems, providing reliable performance under varying loads. Its inch sizing makes it a fit for many American and British vehicle models.

For industrial conveyor systems, 34307-34478D Bearing’s tapered roller design offers smooth operation even under high stress. The open seal type allows for easy lubrication, extending its service life.

Where Is 34307-34478D Bearing Used?
You’ll often find 34307-34478D Bearing in agricultural machinery, where its robust design handles dusty and high-load conditions. The steel cage adds extra strength for long-term use.

In mining equipment, 34307-34478D Bearing’s ability to manage combined loads makes it ideal for crushers and screens. The standard radial clearance ensures consistent performance under heavy stress.

Built for Heavy-Duty Use: 34307-34478D Bearing
34307-34478D Bearing is a go-to choice for forestry machinery, where its tapered rollers handle shock loads effortlessly. The chrome steel rollers resist wear even in abrasive conditions.

For railway applications, 34307-34478D Bearing provides stability in axle boxes, ensuring smooth rides. Its ABEC-1 rating balances precision and cost-effectiveness for transport needs.

Automotive vs Aerospace: Applications of 34307-34478D Bearing
In automotive systems, 34307-34478D Bearing excels in drivetrains, offering reliable load distribution. Its inch measurements align with many classic car restoration projects.

For aerospace ground equipment, 34307-34478D Bearing’s temperature range suits varied climates. The double-row design ensures redundancy, a key factor in safety-critical applications.

Q&A

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