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TS (Single Row Tapered Roller Bearings) (Imperial) 3781-3727

TS (Single Row Tapered Roller Bearings) (Imperial) 3781-3727

The 3781-3727 is a single-row tapered roller bearing with a 1.9375″ bore and 3.6875″ outer diameter, crafted from durable chrome steel. It handles combined loads up to 27500 lbf radially and 4120 lbf in thrust, making it versatile for various applications.

Its open design allows easy lubrication, while the steel cage ensures reliable performance. 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 practical replacement option. Ideal for use in gearboxes, axles, or industrial machinery 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. The ABEC-1 rating ensures consistent performance for general industrial use.

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Product Parameters

  • Part Number 3781-3727
  • Brand TFL
  • Interchangeable Timken
  • Size 1.9375" x 3.6875" x 1.1876"
  • Bore Dia 1.9375"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 3.6875"
  • 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 3727
  • 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 3781-3727 Bearing

3781-3727 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 27,500 lbf, ensuring reliable performance in various applications.
The steel cage maintains roller alignment, reducing friction and extending operational life.
With a temperature range of -30° to 110°C, it performs well in diverse conditions.

How Is 3781-3727 Bearing Engineered for Reliability?

3781-3727 Bearing features precise cone and cup width tolerances, ensuring smooth operation under heavy loads.
The tapered roller design distributes stress evenly, enhancing durability and reducing wear.
Its standard radial clearance options provide flexibility for different operational needs.
Lubrication is required to maintain optimal performance over time.

Built for Durability: 3781-3727 Bearing

3781-3727 Bearing’s chrome steel construction resists wear, making it suitable for demanding environments.
The single-row design simplifies installation while maintaining high load capacity.
With a static radial load of 34,300 lbf, it handles intense operational stresses.
Its ABEC-1 rating ensures consistent performance for general industrial use.

Steel vs Ceramic Bearings: Strengths of 3781-3727 Bearing

3781-3727 Bearing uses chrome steel for both rollers and rings, balancing cost and performance.
This material choice provides excellent strength and fatigue resistance under heavy loads.
The bearing’s open design allows for easy lubrication and maintenance.
Its compatibility with Timken models offers convenient replacement options.

Application

Industrial Uses of 3781-3727 Bearing
The 3781-3727 Bearing is commonly used in heavy machinery, such as construction equipment and agricultural gear, where its tapered roller design handles combined loads efficiently. Its chrome steel construction ensures durability even in demanding environments.

Where Is 3781-3727 Bearing Used?
You’ll often find the 3781-3727 Bearing in automotive applications like wheel hubs and differentials, where its precise tolerances and robust design provide reliable performance. The inch sizing makes it a popular choice for North American vehicles.

Built for Heavy-Duty Use: 3781-3727 Bearing
In industrial settings, the 3781-3727 Bearing excels in conveyor systems and gearboxes, thanks to its ability to manage both radial and thrust loads. The steel cage adds extra strength, making it suitable for high-stress operations.

Automotive vs Aerospace: Applications of 3781-3727 Bearing
While the 3781-3727 Bearing is a staple in automotive drivetrains, its precision also makes it useful in aerospace landing gear components. The ABEC-1 rating ensures consistent performance across different industries.

Perfect Fit for Automation: 3781-3727 Bearing
The 3781-3727 Bearing works well in automated machinery, such as robotic arms, where smooth rotation and load capacity are key. Its open design allows for easy lubrication, extending service life in continuous-use scenarios.

Q&A

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