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3776-3729D TDO (Two-Row Double-Outer Race) (Imperial)

3776-3729D TDO (Two-Row Double-Outer Race) (Imperial)

The 3776-3729D is a two-row tapered roller bearing with a 1.771″ bore and 3.6718″ outer diameter, built from sturdy chrome steel for combined load handling. It supports dynamic radial loads up to 47,800 lbf and fits standard 3700 series applications.

Its double-row design with open construction offers reliable performance, while the steel cage ensures durability. The bearing operates smoothly in temperatures from -30°C to 110°C and requires regular lubrication.

This model is ideal for heavy-duty machinery like gearboxes or axles where combined radial and thrust loads are common. Its standard radial clearance and ABEC-1 rating make it versatile for industrial use.

Weighing 4.41 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it’s a practical choice for replacements or new installations.

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Product Parameters

  • Part Number 3776-3729D
  • Brand TFL
  • Size 1.771" x 3.6718" x 1.193"
  • Bore Dia 1.771"
  • 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 2.32"
  • 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 3776
  • 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 4.41 lb

Features

Performance Features of 3776-3729D Bearing

3776-3729D Bearing is built with chrome steel rings and rollers, offering robust performance under combined loads.
Its dynamic radial load capacity reaches 47,800 lbf, making it suitable for heavy-duty applications.

The double-row tapered roller design ensures stability and efficient load distribution.
With a standard radial clearance, it provides reliable operation in various conditions.

3776-3729D Bearing operates within a temperature range of -30° to 110°C, ensuring versatility.
Its steel cage maintains roller alignment, reducing wear and extending service life.

The open seal type allows for easy lubrication, enhancing maintenance efficiency.
This bearing is designed to meet ABEC-1 standards, balancing precision and durability.

Application

Industrial Uses of 3776-3729D Bearing
The 3776-3729D Bearing is commonly used in heavy machinery, such as construction equipment and mining vehicles, where its double-row design handles combined radial and thrust loads efficiently.
Its chrome steel construction ensures durability even in demanding environments, making it a reliable choice for long-term use.

Where Is 3776-3729D Bearing Used?
You’ll often find the 3776-3729D Bearing in agricultural machinery, like tractors and harvesters, where its tapered roller design provides stability under heavy loads.
The open seal type allows for easy lubrication, which is essential for equipment operating in dusty or wet conditions.

Built for Heavy-Duty Use: 3776-3729D Bearing
In automotive applications, the 3776-3729D Bearing supports wheel hubs and differential systems, thanks to its robust construction and high dynamic load capacity.
The imperial sizing makes it a perfect fit for North American vehicle models, ensuring compatibility and ease of installation.

Automotive vs Aerospace: Applications of 3776-3729D Bearing
While the 3776-3729D Bearing excels in automotive systems, it’s also suitable for aerospace ground support equipment, where precision and reliability are key.
The standard radial clearance option provides flexibility for different operational requirements, balancing performance and longevity.

Key Fields for 3776-3729D Bearing
In industrial fans and blowers, the 3776-3729D Bearing offers smooth operation and reduced vibration, thanks to its tapered roller design.
The steel cage enhances stability, making it a practical choice for high-speed applications where consistent performance is crucial.

Q&A

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