TS (Single Row Tapered Roller Bearings) (Imperial) 3878-3821

The 3878-3821 is a single-row tapered roller bearing with a 1.4375″ bore and 3.375″ outer diameter, crafted from sturdy chrome steel. It manages combined loads up to 27900 lbf radially and 4980 lbf thrust, suitable for various industrial uses.

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.

This model is interchangeable with Timken bearings, making it a practical choice for replacements. It’s ideal for applications like gearboxes or heavy machinery where combined loads are common.

Weighing 1.900 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it’s safe for widespread use.

The tapered roller design provides effective load distribution, enhancing longevity. Its standard radial clearance ensures reliable performance in various conditions.

Perfect for maintenance tasks, its straightforward design simplifies installation and upkeep. A dependable option for engineers and repair professionals alike.

Get A Free Quote

Description

Features

Application

Q&A

Product Parameters

Part Number 3878-3821
Brand TFL
Interchangeable Timken
Size 1.4375" x 3.375" x 1.1876"
Bore Dia 1.4375"
Bore Dia Tolerance +0.005" to 0
Outer Dia 3.375"
Outer Dia Tolerance +0.001" to 0
Cone Width 1.1875"
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 0.03"
Cup Backface ToClear Radius 0.050"
Cone Frontface Backing Diameter 1.85"
Cone Backface Backing Diameter 1.89"
Cup Frontface Backing Diameter 3.23"
Cup Backface Backing Diameter 2.95"
Cage Cone Frontface Clearance 0.11"
Cage Cone Backface Clearance 0.04"
Effective Center Location -0.32"
System of Measurement Inch
Type Bearing
Cone Part Number 3878
Cup Part Number 3821
Bearing Type Roller
Roller Bearing Type Tapered
For Load Direction Combined
Construction Single Row
Seal Type Open
Cups Type Standard
Series 3800
Ring Material Chrome Steel
Roller Material Chrome Steel
Cage Material Steel
Dynamic Radial Load 27900 lbf
Static Radial Load 33200 lbf
Dynamic Radial Rating(90 Million Revolutions)(C90) 7240 lbf
Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 4980 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

Why Choose 3878-3821 Bearing for Precision Tasks?

3878-3821 Bearing is crafted with chrome steel rings and rollers, ensuring durability and precision in combined load applications.
Its dynamic radial load capacity reaches 27,900 lbf, making it suitable for demanding industrial environments.

The single-row tapered roller design enhances stability and reduces friction during operation.
With a standard radial clearance, it offers reliable performance across various temperature ranges.

3878-3821 Bearing’s steel cage maintains roller alignment, extending its service life.
Its ABEC-1 rating ensures consistent performance for precision tasks.

The open seal design allows for easy lubrication, ensuring smooth operation.
This bearing is ideal for applications requiring both radial and thrust load handling.

Application

Industrial Uses of 3878-3821 Bearing
The 3878-3821 Bearing is a reliable choice for heavy machinery, such as construction equipment and agricultural gear, where combined loads are common. Its tapered roller design ensures smooth operation even under demanding conditions.

What Makes 3878-3821 Bearing a Preferred Choice?
In automotive applications, 3878-3821 Bearing handles combined loads in wheel hubs and differentials with ease. The chrome steel construction offers durability, making it suitable for long-term use in vehicles.

Built for Heavy-Duty Use: 3878-3821 Bearing
This bearing excels in industrial fans and pumps, where its single-row tapered design manages radial and thrust loads efficiently. The steel cage adds strength, ensuring consistent performance in high-stress environments.

Automotive vs Aerospace: Applications of 3878-3821 Bearing
While 3878-3821 Bearing is common in truck axles and off-road vehicles, its precision also suits aerospace components like landing gear. The inch sizing makes it versatile for various machinery standards.

Essential Roles of 3878-3821 Bearing
For conveyor systems and mining equipment, 3878-3821 Bearing provides reliable support under heavy radial loads. Its open design simplifies lubrication, extending service life in harsh operating conditions.