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3779-3729D TDO (Two-Row Double-Outer Race) (Imperial)

3779-3729D TDO (Two-Row Double-Outer Race) (Imperial)

The 3779-3729D is a two-row tapered roller bearing with a 1.875″ bore and 3.6718″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 47800 lbf and is designed for long-lasting performance in demanding conditions.

Its double-row construction provides extra stability, while the open design allows for easy lubrication. The bearing operates smoothly in temperatures ranging from -30°C to 110°C.

This model is part of the 3700 series, known for reliability in heavy-duty applications. Ideal for use in 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, ensuring safe and eco-friendly use.

The 3779-3729D features a standard radial clearance, with options for C3, C4, or C5 available. Its tapered rollers and steel cage ensure durability under high stress.

With an ABEC-1 rating, it offers dependable precision for general industrial use. The bearing’s design simplifies maintenance, making it a practical choice for routine servicing.

Perfect for applications like conveyor systems or agricultural equipment, where reliability is key. Its interchangeable parts make replacements straightforward.

The bearing’s dimensions and tolerances ensure a snug fit, reducing wear over time. A solid choice for engineers and maintenance teams alike.

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Product Parameters

  • Part Number 3779-3729D
  • Brand TFL
  • Size 1.875" x 3.6718" x 1.193"
  • Bore Dia 1.875"
  • 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 2.4"
  • 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 3779
  • 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 4.21 lb

Features

How Is 3779-3729D Bearing Engineered for Reliability?

3779-3729D Bearing features a double-row tapered roller design, providing strong resistance to combined radial and thrust loads.
Its chrome steel construction ensures durability, even under heavy dynamic radial loads of up to 47,800 lbf.
The steel cage keeps the rollers aligned, reducing friction and wear for smoother operation.
With a standard radial clearance and ABEC-1 rating, it offers reliable performance in various industrial applications.

What Makes 3779-3729D Bearing Suitable for High-Temperature Applications?

3779-3729D Bearing operates efficiently in temperatures ranging from -30° to 110°C, making it suitable for demanding environments.
Its chrome steel rollers and rings maintain structural integrity under thermal stress.
The open design allows for easy lubrication, ensuring consistent performance even in high-heat conditions.
This bearing is ideal for applications where temperature fluctuations are common.

Built for Durability: 3779-3729D Bearing

3779-3729D Bearing is constructed with high-quality chrome steel, offering excellent resistance to wear and fatigue.
Its double-row design distributes loads evenly, extending the bearing’s service life.
The precise tolerances in bore and outer diameters ensure a secure fit, reducing vibration and noise.
With a dynamic radial rating of 12,400 lbf for two rows, it handles heavy-duty applications with ease.

Steel vs Ceramic Bearings: Strengths of 3779-3729D Bearing

3779-3729D Bearing uses chrome steel for both rollers and rings, providing a balance of strength and affordability.
This material choice ensures high load capacity and resistance to deformation under stress.
The steel cage further enhances durability, making it a reliable choice for industrial use.
While ceramic bearings may offer lower weight, 3779-3729D Bearing excels in cost-effective, high-performance applications.

Application

Industrial Uses of 3779-3729D Bearing
The 3779-3729D 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 effectively.

Its chrome steel construction ensures durability in harsh environments, making it a reliable choice for industrial applications.

Where Is 3779-3729D Bearing Used?
You’ll often find the 3779-3729D Bearing in automotive differentials, where its tapered roller design supports smooth power transmission.

The imperial sizing makes it compatible with many North American vehicle models, offering versatility for mechanics and engineers.

Built for Heavy-Duty Use: 3779-3729D Bearing
This bearing excels in agricultural machinery, such as tractors and harvesters, thanks to its robust construction and high load capacity.

The open seal type allows for easy lubrication, ensuring long service life even in dusty conditions.

Automotive vs Aerospace: Applications of 3779-3729D Bearing
In automotive systems, the 3779-3729D Bearing is ideal for wheel hubs and axles, providing stability under heavy loads.

For aerospace ground equipment, its precision and durability make it suitable for handling and maintenance tools.

Key Fields for 3779-3729D Bearing
The 3779-3729D Bearing is a go-to choice for railway applications, where its double-row design manages dynamic stresses efficiently.

Its standard radial clearance ensures consistent performance in varying temperature conditions, from cold winters to hot summers.

Q&A

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