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3478-3424YD TDO (Two-Row Double-Outer Race) (Imperial)

3478-3424YD TDO (Two-Row Double-Outer Race) (Imperial)

The 3478-3424YD is a double-row tapered roller bearing with a 1.375″ bore and 3.25″ outer diameter, built from sturdy chrome steel. It handles combined loads up to 41,000 lbf and is designed for long-lasting performance.

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 conditions.

This model is part of the 3400 series and meets ABEC-1 standards. Ideal for heavy-duty applications like industrial gearboxes or machinery where both radial and thrust loads are present.

Weighing 3.78 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH regulations for safe use.

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Product Parameters

  • Part Number 3478-3424YD
  • Brand TFL
  • Size 1.375" x 3.25" x 1.1721"
  • Bore Dia 1.375"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 3.25"
  • Outer Dia Tolerance +0.001" to 0
  • Double Cup Width 2.1875"
  • Double Cup Width Tolerance +0.003" to -0.01
  • Cone Width 1.1721"
  • Cone Width Tolerance +0.002" to -0.01
  • Bearing Width Across Cups 2.6251"
  • Bearing Width Across Cups Tolerance +0.008" to 0
  • Cup Backface ToClear Radius 0.03"
  • Cone Backface Backing Diameter 1.97"
  • Cup Frontface Backing Diameter 2.99"
  • Cage Cone Backface Clearance 0.04"
  • Dynamic Radial Load 41000 lbf
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 3478
  • Cup Part Number 3424YD
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Double Row
  • Seal Type Open
  • Cups Type Standard
  • Series 3400
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Rating(One Row 90 Million Revolutions) 6100 lbf
  • Dynamic Thrust Rating(90 Million Revolutions) 3820 lbf
  • Dynamic Radial Rating(Two Row 90 Million Revolutions) 10600 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 3.78 lb

Features

Performance Features of 3478-3424YD Bearing

3478-3424YD Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 41,000 lbf, ensuring reliable performance in heavy-duty applications.

The double-row tapered roller design distributes loads evenly, enhancing durability and reducing wear.
With a standard radial clearance, it provides smooth operation across various conditions.

3478-3424YD Bearing operates efficiently within a temperature range of -30° to 110°C.
Its steel cage maintains roller alignment, contributing to extended service life.

The open seal design allows for easy lubrication, ensuring consistent performance.
Weighing just 3.78 lb, it balances strength and practicality for industrial use.

Application

Industrial Uses of 3478-3424YD Bearing
The 3478-3424YD 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 tough working conditions.

Where Is 3478-3424YD Bearing Used?
You’ll often find 3478-3424YD Bearing in automotive applications like truck wheel hubs, where its tapered roller design provides smooth performance under heavy loads. The inch sizing makes it a good fit for North American vehicle standards.

Built for Heavy-Duty Use: 3478-3424YD Bearing
This bearing excels in industrial settings like conveyor systems, where its open design allows for easy lubrication and maintenance. The steel cage adds extra strength, making it reliable for long-term use.

Automotive vs Aerospace: Applications of 3478-3424YD Bearing
In automotive systems, 3478-3424YD Bearing supports high-load components like axles, while in aerospace, its precision helps with landing gear mechanisms. The standard radial clearance ensures consistent performance across different applications.

Practical Applications of 3478-3424YD Bearing
For agricultural machinery, 3478-3424YD Bearing is a solid choice due to its ability to handle dirt and debris without compromising performance. The chrome steel rollers resist wear, even in harsh outdoor conditions.

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