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3780-3729D TDO (Two-Row Double-Outer Race) (Imperial)

3780-3729D TDO (Two-Row Double-Outer Race) (Imperial)

The 3780-3729D is a two-row tapered roller bearing with a 2″ bore and 3.6718″ outer diameter, built from sturdy chrome steel. It handles combined loads up to 47800 lbf and works well in temperatures from -30°C to 110°C.

Its double-row design offers extra stability, while the open seal allows for easy lubrication. The steel cage ensures durability, making it suitable for heavy-duty applications.

This bearing fits standard 3700 series setups and comes with a standard radial clearance. It’s ideal for industrial machinery or automotive systems where high radial and thrust loads are common.

Weighing 3.95 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it’s a reliable choice for replacements or upgrades.

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Product Parameters

  • Part Number 3780-3729D
  • Brand TFL
  • Size 2" x 3.6718" x 1.193"
  • Bore Dia 2"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 3.6718"
  • Outer Dia Tolerance +0.001" to 0
  • Double Cup Width 2.0625"
  • Double Cup Width Tolerance +0.003" to -0.01
  • Cone Width 1.193"
  • Cone Width Tolerance +0.002" to -0.01
  • Bearing Width Across Cups 2.5625"
  • Bearing Width Across Cups Tolerance +0.008" to 0
  • Cup Backface ToClear Radius 0.03"
  • Cone Backface Backing Diameter 2.52"
  • Cup Frontface Backing Diameter 3.50"
  • Cage Cone Backface Clearance 0.06"
  • Dynamic Radial Load 47800 lbf
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 3780
  • Cup Part Number 3729D
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Double Row
  • Seal Type Open
  • Cups Type Standard
  • Series 3700
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Rating(One Row 90 Million Revolutions) 7120 lbf
  • Dynamic Thrust Rating(90 Million Revolutions) 4120 lbf
  • Dynamic Radial Rating(Two Row 90 Million Revolutions) 12400 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 3.95 lb

Features

Performance Features of 3780-3729D Bearing

3780-3729D Bearing is built with chrome steel rings and rollers, offering robust resistance to combined loads.
Its dynamic radial load capacity reaches 47,800 lbf, ensuring dependable performance in heavy-duty applications.

The double-row tapered roller design enhances load distribution, reducing stress and extending service life.
With a standard radial clearance, it provides smooth operation across various industrial uses.

3780-3729D Bearing operates efficiently within a temperature range of -30° to 110°C.
Its steel cage maintains roller alignment, ensuring consistent performance under demanding conditions.

The open seal design allows for easy lubrication, supporting long-term reliability.
This bearing is ideal for applications requiring durability and precision in imperial measurements.

Application

Industrial Uses of 3780-3729D Bearing
The 3780-3729D 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. Its chrome steel construction ensures durability in demanding environments.

In automotive applications, 3780-3729D Bearing supports axle systems and wheel hubs, providing reliable performance under varying loads. The imperial sizing makes it a preferred choice for North American vehicle manufacturers.

For industrial automation, 3780-3729D Bearing is ideal for conveyor systems and robotic arms, where its open design allows for easy lubrication and maintenance. The tapered roller design ensures smooth operation even at high speeds.

Where Is 3780-3729D Bearing Used?
You’ll often find 3780-3729D Bearing in agricultural machinery, like tractors and harvesters, where its robust construction withstands harsh conditions. The standard radial clearance offers flexibility for different load requirements.

In material handling equipment, 3780-3729D Bearing ensures smooth operation in forklifts and cranes. Its ABEC-1 rating provides sufficient precision for most industrial applications without unnecessary cost.

Built for Heavy-Duty Use: 3780-3729D Bearing
The 3780-3729D Bearing excels in forestry equipment, such as log splitters and sawmills, thanks to its high dynamic radial load capacity. The steel cage adds extra strength for prolonged use.

For railway applications, 3780-3729D Bearing is used in bogies and traction motors, where its temperature range suits both cold and warm climates. The double-row design distributes loads evenly, reducing wear.

Automotive vs Aerospace: Applications of 3780-3729D Bearing
In automotive systems, 3780-3729D Bearing is favoured for its balance of performance and cost, fitting well in trucks and buses. The inch measurements simplify replacements in older models.

For aerospace ground support equipment, 3780-3729D Bearing handles heavy loads while maintaining precision. Its compliance with RoHS and REACH standards ensures environmental safety.

Q&A

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