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3478-3423D TDO (Two-Row Double-Outer Race) (Imperial)

3478-3423D TDO (Two-Row Double-Outer Race) (Imperial)

The 3478-3423D is a two-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 41000 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 in temperatures from -30°C to 110°C, making it versatile for various conditions.

This double-row design offers extra stability, ideal for heavy-duty applications like truck axles or industrial gearboxes. With standard radial clearance, it’s a reliable choice for replacements or new installations.

Weighing 3.78 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it meets safety and environmental requirements.

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Product Parameters

  • Part Number 3478-3423D
  • 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 3423D
  • 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

How Is 3478-3423D Bearing Engineered for Reliability?

3478-3423D Bearing features a double-row tapered roller design, providing strong resistance to combined radial and thrust loads.
Its chrome steel construction ensures durability, with a dynamic radial load capacity of 41,000 lbf.
The steel cage maintains roller alignment, reducing friction and extending operational life.
With a standard radial clearance, it offers reliable performance across a temperature range of -30° to 110°C.

Structural Advantages of 3478-3423D Bearing

3478-3423D Bearing’s double-row design enhances load distribution, making it suitable for heavy-duty applications.
The tapered rollers and chrome steel materials contribute to its high dynamic radial rating of 10,600 lbf for two rows.
Precision tolerances ensure smooth operation, while the open seal type allows for easy lubrication.
This bearing is built to withstand demanding conditions, maintaining performance over time.

What Makes 3478-3423D Bearing Suitable for High-Temperature Applications?

3478-3423D Bearing operates reliably in temperatures ranging from -30° to 110°C, thanks to its robust chrome steel construction.
The double-row tapered roller design efficiently handles combined loads, reducing heat buildup.
Its steel cage ensures stability, even under high stress, while standard radial clearance options provide flexibility.
This combination of features makes it a dependable choice for challenging environments.

Application

Industrial Uses of 3478-3423D Bearing
3478-3423D Bearing is commonly used in heavy machinery like construction equipment, where its double-row design handles combined radial and thrust loads efficiently. The chrome steel construction ensures durability even in demanding environments.

In automotive applications, 3478-3423D Bearing fits well in wheel hubs and differential systems, providing reliable performance under varying loads. Its imperial sizing makes it a preferred choice for North American vehicle models.

For industrial conveyor systems, 3478-3423D Bearing’s open design allows for easy lubrication, reducing downtime. The tapered roller design ensures smooth operation even under high radial loads.

What Makes 3478-3423D Bearing a Preferred Choice?
3478-3423D Bearing is often selected for agricultural machinery due to its ability to withstand harsh conditions. The steel cage adds extra strength, making it suitable for high-vibration environments.

In mining equipment, 3478-3423D Bearing’s robust construction helps manage heavy loads and abrasive conditions. Its standard radial clearance offers flexibility for various operational needs.

Built for Heavy-Duty Use: 3478-3423D Bearing
3478-3423D Bearing excels in forestry machinery, where its combined load capacity is essential. The ABEC-1 rating ensures consistent performance without unnecessary precision costs.

For railway applications, 3478-3423D Bearing provides reliable support in axle boxes. Its temperature range of -30° to 110°C makes it adaptable to diverse climates.

Light-Duty vs Heavy-Duty: Best Uses for 3478-3423D Bearing
3478-3423D Bearing is versatile enough for both light-duty industrial fans and heavy-duty presses. The double-row design balances load distribution effectively.

In material handling equipment, 3478-3423D Bearing’s tapered rollers reduce friction, enhancing efficiency. Its weight of 3.78 lb strikes a good balance between strength and portability.

Q&A

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