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

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

The 3780-3729DC is a double-row tapered roller bearing with a 2″ bore and 3.6718″ outer diameter, built from sturdy chrome steel. It handles combined loads well, with a dynamic radial capacity of 47800 lbf and a two-row rating of 12400 lbf.

Its open design allows for easy lubrication, while the steel cage ensures durability. The bearing operates smoothly in temperatures from -30°C to 110°C, making it versatile for various conditions.

This model is part of the 3700 series, featuring standard cups and a standard radial clearance. It’s ideal for heavy-duty applications like industrial gearboxes or vehicle axles where combined 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 new installations.

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Product Parameters

  • Part Number 3780-3729DC
  • 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 3729DC
  • 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

How Does 3780-3729DC Bearing Handle Combined Loads?

3780-3729DC Bearing is built with chrome steel rings and rollers, offering strong resistance to combined radial and thrust loads.
Its dynamic radial load capacity reaches 47,800 lbf, ensuring reliable performance in heavy-duty applications.
The double-row tapered roller design distributes loads evenly, reducing stress and extending service life.
With a temperature range of -30° to 110°C, it performs well in various operating conditions.

Structural Advantages of 3780-3729DC Bearing

3780-3729DC Bearing features a double-row tapered roller design, providing stability under combined loads.
The chrome steel construction enhances durability, making it suitable for demanding environments.
Its standard radial clearance ensures smooth operation, while the steel cage maintains roller alignment.
This design minimises wear and reduces maintenance needs over time.

Why Choose 3780-3729DC Bearing for Heavy-Duty Applications?

3780-3729DC Bearing handles high dynamic radial loads up to 47,800 lbf, ideal for heavy machinery.
The tapered roller design efficiently manages both radial and thrust loads, ensuring balanced performance.
Chrome steel components resist wear, while the steel cage keeps rollers in place for consistent operation.
Its wide temperature range makes it versatile for various industrial applications.

Application

Industrial Uses of 3780-3729DC Bearing
The 3780-3729DC Bearing is well-suited for heavy machinery, such as construction equipment and mining tools, where its double-row design handles combined radial and thrust loads efficiently.
Its chrome steel construction ensures durability in demanding environments, making it a reliable choice for long-term use.

Where Is 3780-3729DC Bearing Used?
You’ll often find 3780-3729DC Bearing in automotive applications like truck wheel hubs, where its tapered roller design provides stability under heavy loads.
The inch sizing makes it compatible with many North American vehicle models, simplifying maintenance and replacements.

Built for Heavy-Duty Use: 3780-3729DC Bearing
In industrial conveyor systems, 3780-3729DC Bearing excels due to its ability to manage high dynamic radial loads.
The open seal type allows for easy lubrication, ensuring smooth operation even in continuous-use scenarios.

Automotive vs Aerospace: Applications of 3780-3729DC Bearing
While 3780-3729DC Bearing is common in trucks and heavy vehicles, its precision also makes it suitable for aerospace ground support equipment.
The bearing’s temperature range and ABEC-1 rating ensure consistent performance in varying conditions.

Perfect Fit for Automation: 3780-3729DC Bearing
In automated production lines, 3780-3729DC Bearing supports robotic arms and assembly systems with its reliable load-bearing capacity.
The steel cage adds extra strength, making it ideal for high-cycle applications.

Q&A

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