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TS (Single Row Tapered Roller Bearings) (Imperial) 3977X-3920

TS (Single Row Tapered Roller Bearings) (Imperial) 3977X-3920

The 3977X-3920 is a single-row tapered roller bearing with a 2.36″ bore and 4.44″ outer diameter, crafted from durable chrome steel. It handles combined loads up to 31,200 lbf radially and 5,570 lbf thrust, making it sturdy for heavy-duty use.

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

This model is interchangeable with Timken bearings, offering a practical replacement option. Ideal for applications like wheel hubs or industrial gearboxes where combined loads are common.

Weighing 2.9 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it’s a safe choice for most industrial needs.

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Product Parameters

  • Part Number 3977X-3920
  • Brand TFL
  • Interchangeable Timken
  • Size 2.3617" x 4.4375" x 1.1875"
  • Bore Dia 2.3617"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 4.4375"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 1.1024"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 0.9375"
  • Cup Width Tolerance +0.002" to -0.01
  • Width 1.1875"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.09"
  • Cup Backface ToClear Radius 0.130"
  • Cone Frontface Backing Diameter 2.68"
  • Cone Backface Backing Diameter 2.83"
  • Cup Frontface Backing Diameter 4.18"
  • Cup Backface Backing Diameter 3.90"
  • Cage Cone Frontface Clearance 0.16"
  • Cage Cone Backface Clearance 0.06"
  • Effective Center Location -0.18"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 3977X
  • Cup Part Number 3920
  • 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 3977X-3920 Bearing

3977X-3920 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 31,200 lbf, ensuring reliable performance in demanding conditions.

The steel cage maintains roller alignment, reducing friction and extending service life.
With a temperature range of -30° to 110°C, it performs well in various environments.

3977X-3920 Bearing’s standard radial clearance allows for smooth operation under different load conditions.
Its ABEC-1 rating ensures consistent precision for industrial applications.

Application

Industrial Uses of 3977X-3920 Bearing
The 3977X-3920 Bearing is commonly used in heavy machinery, such as construction equipment and mining tools, where its tapered roller design handles combined loads effectively. Its chrome steel construction ensures durability in demanding environments.

In automotive applications, 3977X-3920 Bearing supports wheel hubs and drivetrain components, providing reliable performance under high stress. The imperial sizing makes it a convenient choice for North American vehicle models.

For industrial conveyor systems, 3977X-3920 Bearing’s open design allows for easy lubrication, extending its service life. The steel cage adds stability, making it suitable for continuous operation.

Where Is 3977X-3920 Bearing Used?
You’ll often find 3977X-3920 Bearing in agricultural machinery, like tractors and harvesters, where its robust design handles rough terrain. The tapered rollers distribute loads evenly, reducing wear.

In manufacturing plants, 3977X-3920 Bearing is ideal for gearboxes and pumps, thanks to its high dynamic radial load capacity. The ABEC-1 rating ensures consistent performance for general industrial use.

Built for Heavy-Duty Use: 3977X-3920 Bearing
The 3977X-3920 Bearing excels in forestry equipment, where its chrome steel rollers withstand heavy loads and shocks. Its standard radial clearance offers flexibility for various applications.

For railway applications, 3977X-3920 Bearing provides reliable support in axle boxes, ensuring smooth operation. The steel cage enhances durability, even in high-vibration environments.

Automotive vs Aerospace: Applications of 3977X-3920 Bearing
In automotive systems, 3977X-3920 Bearing is a go-to for differentials and transmissions, offering balanced performance. Its imperial sizing fits seamlessly with standard components.

For aerospace ground support equipment, 3977X-3920 Bearing handles moderate loads with precision. The temperature range of -30° to 110°C ensures reliability in varying conditions.

Q&A

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