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TS (Single Row Tapered Roller Bearings) (Imperial) 3981-3919RB

TS (Single Row Tapered Roller Bearings) (Imperial) 3981-3919RB

The 3981-3919RB is a single-row tapered roller bearing with a 2.3125″ bore and 4.4375″ outer diameter, crafted from durable chrome steel. It handles combined loads up to 31200 lbf radially and 5570 lbf in thrust, making it versatile for various applications.

Its open design allows easy lubrication, while the steel cage ensures reliable performance under heavy loads. The bearing operates smoothly in temperatures ranging from -30°C to 110°C.

This model is interchangeable with Timken bearings, offering a practical replacement option. Ideal for industrial machinery, gearboxes, or automotive systems where combined loads are common.

Weighing 2.9 lb, it’s sturdy yet manageable for its size. Compliant with RoHS and REACH standards, it meets safety and environmental requirements.

The standard radial clearance and ABEC-1 rating ensure consistent performance. Its tapered roller design provides efficient load distribution, reducing wear over time.

Suitable for high-load scenarios, it’s a dependable choice for engineers and maintenance teams. The clearances and tolerances are designed for precise fitting, ensuring smooth operation.

With its robust construction, this bearing is built to last in demanding environments. Easy to maintain and replace, it’s a practical solution for long-term use.

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Product Parameters

  • Part Number 3981-3919RB
  • Brand TFL
  • Interchangeable Timken
  • Size 2.3125" x 4.4375" x 1.1875"
  • Bore Dia 2.3125"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 4.4375"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 1.183"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 0.9687"
  • Cup Width Tolerance +0.002" to -0.01
  • Width 1.1875"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.14"
  • Cup Backface ToClear Radius 0.130"
  • Cone Frontface Backing Diameter 2.64"
  • Cone Backface Backing Diameter 2.87"
  • Cup Frontface Backing Diameter 4.18"
  • Cup Backface Backing Diameter 3.90"
  • Cage Cone Frontface Clearance 0.08"
  • Cage Cone Backface Clearance 0.06"
  • Effective Center Location -0.18"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 3981
  • Cup Part Number 3919RB
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Cups Type Standard
  • Series 3900
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 31200 lbf
  • Static Radial Load 43000 lbf
  • Dynamic Radial Rating(90 Million Revolutions)(C90) 8090 lbf
  • Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 5570 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 2.9 lb

Features

Performance Features of 3981-3919RB Bearing

3981-3919RB Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 31,200 lbf, making it suitable for heavy-duty applications.
The steel cage ensures proper roller alignment, reducing friction and wear.
With a temperature range of -30° to 110°C, it performs reliably in various conditions.

Why Choose 3981-3919RB Bearing for Precision Tasks?

3981-3919RB Bearing features precise tolerances, with bore diameter tolerance of +0.005″ to 0.
The tapered roller design provides excellent load distribution, enhancing performance and longevity.
Its ABEC-1 rating ensures consistent quality for precision applications.
The standard radial clearance option allows for flexibility in different operating conditions.

Engineered for Reliability: 3981-3919RB Bearing

3981-3919RB Bearing’s single-row construction simplifies installation and maintenance.
The chrome steel components resist wear, ensuring a longer service life.
With a static radial load capacity of 43,000 lbf, it handles demanding environments.
Its open design allows for easy lubrication, reducing downtime.

Application

Industrial Uses of 3981-3919RB Bearing
The 3981-3919RB 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 3981-3919RB Bearing Used?
You’ll often find the 3981-3919RB Bearing in automotive applications, particularly in wheel hubs and differential systems.
Its precise inch sizing and compatibility with Timken models make it a versatile option for various vehicle types.

Built for Heavy-Duty Use: 3981-3919RB Bearing
The 3981-3919RB Bearing excels in industrial settings like conveyor systems, where its high dynamic radial load capacity is essential.
Its open design allows for easy lubrication, ensuring smooth operation under continuous stress.

Automotive vs Industrial: Applications of 3981-3919RB Bearing
In automotive systems, the 3981-3919RB Bearing supports wheel assemblies, while in industrial gear, it’s ideal for pumps and gearboxes.
The bearing’s standard radial clearance and ABEC-1 rating balance performance and affordability for diverse needs.

Key Fields for 3981-3919RB Bearing
The 3981-3919RB Bearing is a go-to for mining equipment, where its robust design handles heavy loads and harsh conditions.
Its steel cage and chrome steel rollers provide added strength, making it suitable for high-impact applications.

Q&A

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