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TS (Single Row Tapered Roller Bearings) (Imperial) 3781-3720V

TS (Single Row Tapered Roller Bearings) (Imperial) 3781-3720V

The 3781-3720V is a single-row tapered roller bearing with a 1.9375″ bore and 3.6718″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 27500 lbf radially and 4120 lbf thrust, making it versatile for various applications.

Its open design allows for easy lubrication, while the steel cage ensures durability. The bearing operates smoothly in temperatures ranging from -30°C to 110°C, suitable for demanding environments.

This model is interchangeable with Timken bearings, offering a reliable replacement option. Ideal for heavy-duty machinery or automotive systems where combined loads are common.

Weighing 1.9 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it meets safety and environmental requirements.

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Product Parameters

  • Part Number 3781-3720V
  • Brand TFL
  • Interchangeable Timken
  • Size 1.9375" x 3.6718" x 1.1876"
  • Bore Dia 1.9375"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 3.6718"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 1.193"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 0.9375"
  • Cup Width Tolerance +0.002" to -0.01
  • Width 1.1876"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.14"
  • Cup Backface ToClear Radius 0.130"
  • Cone Frontface Backing Diameter 2.2"
  • Cone Backface Backing Diameter 2.44"
  • Cup Frontface Backing Diameter 3.50"
  • Cup Backface Backing Diameter 3.23"
  • Cage Cone Frontface Clearance 0.06"
  • Cage Cone Backface Clearance 0.06"
  • Effective Center Location -0.32"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 3781
  • Cup Part Number 3720V
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Cups Type Standard
  • Series 3700
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 27500 lbf
  • Static Radial Load 34300 lbf
  • Dynamic Radial Rating(90 Million Revolutions)(C90) 7120 lbf
  • Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 4120 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 1.900 lb

Features

Performance Features of 3781-3720V Bearing

3781-3720V Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 27,500 lbf, making it suitable for heavy-duty applications.

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

3781-3720V 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 design allows for easy lubrication, enhancing maintenance efficiency.
Weighing just 1.900 lb, it balances durability and ease of handling.

Application

Industrial Uses of 3781-3720V Bearing
The 3781-3720V Bearing is commonly used in heavy machinery like construction equipment and agricultural gear, where its tapered roller design handles combined loads efficiently.
Its chrome steel construction ensures durability even in demanding environments, making it a reliable choice for long-term use.

Where Is 3781-3720V Bearing Used?
You’ll often find the 3781-3720V Bearing in automotive applications, particularly in wheel hubs and differential systems.
Its precise inch measurements and compatibility with Timken designs make it a versatile option for various vehicle models.

Built for Heavy-Duty Use: 3781-3720V Bearing
In industrial settings, the 3781-3720V Bearing excels in conveyor systems and gearboxes, thanks to its robust steel cage and high load capacity.
The open design allows for easy lubrication, ensuring smooth operation even under continuous stress.

Automotive vs Aerospace: Applications of 3781-3720V Bearing
While the 3781-3720V Bearing is popular in automotive systems like axles, it’s also suitable for aerospace ground support equipment.
Its standard radial clearance and ABEC-1 rating provide a balance of performance and affordability for diverse needs.

Perfect Fit for Automation: 3781-3720V Bearing
The 3781-3720V Bearing works well in automated machinery, such as robotic arms and assembly line equipment.
Its tapered rollers ensure precise movement, while the chrome steel construction resists wear over time.

Q&A

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