TS (Single Row Tapered Roller Bearings) (Imperial) 9378-9321

The 9378-9321 is a single-row tapered roller bearing with a 3″ bore and 6.75″ outer diameter, crafted from sturdy chrome steel. It manages combined loads up to 81600 lbf radially and 27700 lbf thrust, making it versatile for heavy-duty use.

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

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

Weighing 11.8 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards for safe and eco-friendly use.

The standard radial clearance and ABEC-1 rating ensure consistent performance. Its tapered roller design provides excellent load distribution and long service life.

Perfect for applications like gearboxes, wheel hubs, or conveyor systems. The precise tolerances and effective center location enhance stability and alignment.

Maintenance is straightforward, with clearances designed for easy inspection and lubrication. A dependable choice for demanding environments.

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Description

Features

Application

Q&A

Product Parameters

Part Number 9378-9321
Brand TFL
Interchangeable Timken
Size 3" x 6.75" x 2.0265"
Bore Dia 3"
Bore Dia Tolerance +0.005" to 0
Outer Dia 6.75"
Outer Dia Tolerance +0.001" to 0
Cone Width 2"
Cone Width Tolerance +0.003" to -0.01
Cup Width 1.25"
Cup Width Tolerance +0.002" to -0.01
Width 2.0265"
Width Tolerance +0.008" to 0
Cone Backface ToClear Radius 0.14"
Cup Backface ToClear Radius 0.130"
Cone Frontface Backing Diameter 4.57"
Cone Backface Backing Diameter 4.13"
Cup Frontface Backing Diameter 6.48"
Cup Backface Backing Diameter 5.79"
Cage Cone Frontface Clearance 0.13"
Cage Cone Backface Clearance 0.44"
Effective Center Location 0.05"
System of Measurement Inch
Type Bearing
Cone Part Number 9378
Cup Part Number 9321
Bearing Type Roller
Roller Bearing Type Tapered
For Load Direction Combined
Construction Single Row
Seal Type Open
Cups Type Standard
Series 9300
Ring Material Chrome Steel
Roller Material Chrome Steel
Cage Material Steel
Dynamic Radial Load 81600 lbf
Static Radial Load 78800 lbf
Dynamic Radial Rating(90 Million Revolutions)(C90) 21200 lbf
Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 27700 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 11.8 lb

Features

Performance Features of 9378-9321 Bearing

9378-9321 Bearing is crafted from chrome steel, offering high resistance to combined loads with a dynamic radial load capacity of 81,600 lbf.
Its tapered roller design ensures efficient load distribution, enhancing durability in demanding conditions.
The steel cage maintains roller alignment, reducing friction and wear for smoother operation.
With a temperature range of -30° to 110°C, it performs reliably in various environments.

How Is 9378-9321 Bearing Engineered for Reliability?

9378-9321 Bearing features a single-row tapered roller construction, ideal for handling both radial and thrust loads.
The chrome steel rollers and rings provide excellent strength, supporting static radial loads up to 78,800 lbf.
Precision tolerances ensure consistent performance, while the open design allows for easy lubrication.
This bearing is interchangeable with Timken models, offering flexibility in replacement options.

Built for Durability: 9378-9321 Bearing

9378-9321 Bearing’s robust chrome steel construction ensures long service life under heavy loads.
Its tapered rollers and precise cage design minimise wear, maintaining performance over time.
The standard radial clearance and ABEC-1 rating make it suitable for a wide range of applications.
With a weight of 11.8 lb, it balances strength and practicality for industrial use.

Steel vs Ceramic Bearings: Strengths of 9378-9321 Bearing

9378-9321 Bearing uses chrome steel for both rollers and rings, providing superior load-bearing capacity.
This material choice ensures reliability in high-stress environments, outperforming ceramic alternatives in durability.
The steel cage further enhances stability, keeping rollers aligned during operation.
Its compatibility with Timken models adds to its versatility and ease of integration.

Application

Industrial Uses of 9378-9321 Bearing
The 9378-9321 Bearing is commonly used in heavy machinery like construction equipment and mining rigs, where its tapered roller design handles combined loads efficiently. Its chrome steel construction ensures durability even in demanding environments.

Where Is 9378-9321 Bearing Used?
You’ll often find 9378-9321 Bearing in agricultural machinery, such as tractors and harvesters, where its robust design supports high radial and thrust loads. The open seal type allows for easy lubrication, extending its service life.

Built for Heavy-Duty Use: 9378-9321 Bearing
In automotive applications, 9378-9321 Bearing is ideal for wheel hubs and differential systems, thanks to its precise tolerances and reliable performance. The steel cage adds extra strength, making it suitable for long-haul vehicles.

Automotive vs Aerospace: Applications of 9378-9321 Bearing
While 9378-9321 Bearing excels in truck axles and industrial gearboxes, its precision also makes it a fit for aerospace landing gear components. The inch sizing ensures compatibility with a wide range of imperial-based machinery.

Perfect Fit for Automation: 9378-9321 Bearing
In automated production lines, 9378-9321 Bearing supports conveyor systems and robotic arms, where its tapered rollers provide smooth motion. The standard radial clearance option makes it versatile for various speed requirements.