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3777-3729D TDO (Two-Row Double-Outer Race) (Imperial)

3777-3729D TDO (Two-Row Double-Outer Race) (Imperial)

The 3777-3729D is a two-row tapered roller bearing with a 1.8125″ bore and 3.6718″ outer diameter, built from sturdy chrome steel for long-lasting performance. It handles combined loads with a dynamic radial capacity of 47,800 lbf and operates smoothly in temperatures from -30°C to 110°C.

Its double-row design provides extra stability, while the open seal allows for easy lubrication. The bearing comes in standard radial clearance, with options for C3, C4, or C5 if needed.

This model is part of the 3700 series, known for reliability in heavy-duty applications. Ideal for industrial machinery or automotive systems where high radial and thrust loads are common.

Weighing 4.34 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, ensuring safe and eco-friendly use.

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Product Parameters

  • Part Number 3777-3729D
  • Brand TFL
  • Size 1.8125" x 3.6718" x 1.193"
  • Bore Dia 1.8125"
  • 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 2.36"
  • 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 3777
  • 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 4.34 lb

Features

How Is 3777-3729D Bearing Engineered for Reliability?

3777-3729D 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 service life.
With a standard radial clearance, it offers reliable performance in various applications.

3777-3729D Bearing operates within a temperature range of -30° to 110°C, suitable for diverse environments.
Its ABEC-1 rating ensures consistent precision and smooth operation.

Application

Industrial Uses of 3777-3729D Bearing
3777-3729D 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. The chrome steel construction ensures durability in tough working conditions.

Where Is 3777-3729D Bearing Used?
In automotive applications, 3777-3729D 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.

Built for Heavy-Duty Use: 3777-3729D Bearing
For industrial conveyor systems, 3777-3729D Bearing offers smooth operation and long service life, thanks to its tapered roller design. The open seal type allows for easy lubrication and maintenance.

Automotive vs Aerospace: Applications of 3777-3729D Bearing
While 3777-3729D Bearing excels in automotive wheel assemblies, it also finds use in aerospace landing gear systems, where its combined load capacity is crucial. The steel cage adds extra strength for high-stress environments.

Key Fields for 3777-3729D Bearing
In agricultural machinery, 3777-3729D Bearing supports equipment like tractors and harvesters, handling heavy loads with ease. The standard radial clearance ensures consistent performance in varying temperatures.

Q&A

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