3774-3729D TDO (Two-Row Double-Outer Race) (Imperial)

The 3774-3729D is a two-row tapered roller bearing with a 1.5625″ bore and 3.6718″ outer diameter, built from sturdy chrome steel for long-lasting performance.

It handles combined loads well, with a dynamic radial load capacity of 47800 lbf and a dynamic thrust rating of 4120 lbf, making it suitable for heavy-duty applications.

The open design allows for easy lubrication, while the steel cage ensures smooth operation. It works in temperatures from -30°C to 110°C.

Ideal for industrial machinery or automotive systems where high load capacity and durability are needed. Compliant with RoHS and REACH standards, it weighs 4.79 lb for its size.

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Description

Features

Application

Q&A

Product Parameters

Part Number 3774-3729D
Brand TFL
Size 1.5625" x 3.6718" x 1.193"
Bore Dia 1.5625"
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 2.17"
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 3774
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 4.79 lb

Features

How Is 3774-3729D Bearing Engineered for Reliability?

3774-3729D 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 47,800 lbf.
The steel cage maintains roller alignment, reducing friction and extending operational life.
With a standard radial clearance, it offers reliable performance across various applications.

What Makes 3774-3729D Bearing Suitable for High-Temperature Applications?

3774-3729D Bearing operates efficiently in temperatures ranging from -30° to 110 °C, making it versatile for different environments.
The chrome steel rings and rollers resist wear, ensuring consistent performance under thermal stress.
Its open seal design allows for easy lubrication, maintaining smooth operation.
The bearing’s robust construction handles high loads without compromising reliability.

Designed for Durability: 3774-3729D Bearing

3774-3729D Bearing’s double-row tapered rollers distribute loads evenly, enhancing its lifespan.
The chrome steel components resist wear, making it suitable for heavy-duty applications.
With a dynamic radial rating of 12,400 lbf for two rows, it delivers dependable performance.
Its standard radial clearance ensures compatibility with various machinery setups.

Steel vs Ceramic Bearings: Strengths of 3774-3729D Bearing

3774-3729D Bearing uses chrome steel for both rings and rollers, offering excellent strength and wear resistance.
The steel cage ensures proper roller alignment, reducing friction and noise.
Its dynamic thrust rating of 4,120 lbf makes it reliable for combined load applications.
The bearing’s open design simplifies maintenance, keeping operational costs low.

Application

Industrial Uses of 3774-3729D Bearing
3774-3729D Bearing is commonly used in heavy machinery, such as construction equipment and mining tools, where its double-row design handles combined radial and thrust loads effectively. The chrome steel construction ensures durability in demanding environments.

In automotive applications, 3774-3729D Bearing supports wheel hubs and differential systems, providing reliable performance under varying loads. Its inch sizing makes it a suitable choice for American and British vehicle models.

For industrial automation, 3774-3729D Bearing’s tapered roller design offers smooth operation in conveyor systems and robotic arms. The open seal type allows for easy lubrication, extending its service life in high-use scenarios.

3774-3729D Bearing also finds use in agricultural machinery, such as tractors and harvesters, where its robust construction withstands harsh conditions. The standard radial clearance ensures consistent performance across different operating temperatures.