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34300A-34478D TDO (Two-Row Double-Outer Race) (Imperial)

34300A-34478D TDO (Two-Row Double-Outer Race) (Imperial)

The 34300A-34478D is a double-row tapered roller bearing with a 3-inch bore and 4.7812-inch outer diameter, built from sturdy chrome steel. It handles combined loads up to 40000 lbf and is designed for long-lasting performance in demanding conditions.

Its open design allows for easy lubrication, while the steel cage ensures smooth operation. The bearing works well in temperatures from -30°C to 110°C, making it versatile for various environments.

This model is part of the 34000 series and comes with standard cups for easy installation. Ideal for heavy-duty applications like industrial gearboxes or machinery where both radial and thrust loads are present.

Weighing 4.21 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 34300A-34478D
  • Brand TFL
  • Size 3" x 4.7812" x 0.906"
  • Bore Dia 3"
  • 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 3.39"
  • 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 34300A
  • 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 4.21 lb

Features

How Is 34300A-34478D Bearing Engineered for Reliability?

34300A-34478D Bearing features a double-row tapered roller design, providing strong resistance to combined radial and thrust loads.
Its chrome steel construction ensures durability and long service life in demanding applications.
The bearing’s dynamic radial load capacity reaches 40,000 lbf, making it suitable for heavy-duty use.
With a standard radial clearance, it offers reliable performance across various operating conditions.

What Makes 34300A-34478D Bearing Suitable for High-Temperature Applications?

34300A-34478D Bearing operates efficiently within a temperature range of -30° to 110 °C.
Its chrome steel rings and rollers maintain structural integrity even under thermal stress.
The open seal design allows for proper lubrication, ensuring smooth performance in high-heat environments.
This makes it a dependable choice for industrial and automotive applications.

Built for Durability: 34300A-34478D Bearing

34300A-34478D Bearing is constructed with high-quality chrome steel for enhanced strength and wear resistance.
The double-row design distributes loads evenly, reducing stress on individual components.
Its standard radial clearance ensures consistent performance under varying operational conditions.
With a weight of 4.21 lb, it balances robustness and practicality for diverse applications.

Application

Industrial Uses of 34300A-34478D Bearing
The 34300A-34478D Bearing is commonly used in heavy machinery, such as construction equipment and mining gear, where its double-row design handles combined radial and thrust loads efficiently.
Its chrome steel construction ensures durability in harsh environments, making it a reliable choice for long-term use.

Where Is 34300A-34478D Bearing Used?
You’ll often find the 34300A-34478D Bearing in automotive applications like truck wheel hubs, where its tapered roller design supports high loads.
The inch sizing makes it compatible with many North American industrial standards, simplifying replacements.

Built for Heavy-Duty Use: 34300A-34478D Bearing
This bearing excels in agricultural machinery, such as tractors and harvesters, thanks to its robust steel cage and open design for easy lubrication.
The standard radial clearance ensures smooth operation even under varying load conditions.

Automotive vs Aerospace: Applications of 34300A-34478D Bearing
In automotive settings, the 34300A-34478D Bearing is ideal for axles and transmissions, while its precision suits aerospace landing gear components.
The ABEC-1 rating balances performance and cost for these demanding applications.

Key Fields for 34300A-34478D Bearing
Railway systems benefit from the 34300A-34478D Bearing’s ability to handle heavy radial loads and moderate thrust forces.
Its temperature range of -30° to 110°C ensures reliability in diverse climates.

Q&A

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