TS (Single Row Tapered Roller Bearings) (Imperial) 3188-3120

The 3188-3120 is a single-row tapered roller bearing with a 1.25″ bore and 2.8593″ outer diameter, crafted from durable chrome steel. It handles combined loads up to 21300 lbf radially and 3140 lbf in thrust, making it versatile for various applications.

Its open design allows for 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 use in gearboxes, axles, or industrial machinery where combined loads are common.

Weighing just 1.3 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it’s a safe and dependable choice.

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Description

Features

Application

Q&A

Product Parameters

Part Number 3188-3120
Brand TFL
Interchangeable Timken
Size 1.25" x 2.8593" x 1.1875"
Bore Dia 1.25"
Bore Dia Tolerance +0.005" to 0
Outer Dia 2.8593"
Outer Dia Tolerance +0.001" to 0
Cone Width 1.181"
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 0.03"
Cup Backface ToClear Radius 0.130"
Cone Frontface Backing Diameter 1.56"
Cone Backface Backing Diameter 1.57"
Cup Frontface Backing Diameter 2.68"
Cup Backface Backing Diameter 2.40"
Cage Cone Frontface Clearance 0.06"
Cage Cone Backface Clearance 0.03"
Effective Center Location -0.4"
System of Measurement Inch
Type Bearing
Cone Part Number 3188
Cup Part Number 3120
Bearing Type Roller
Roller Bearing Type Tapered
For Load Direction Combined
Construction Single Row
Seal Type Open
Cups Type Standard
Series 3100
Ring Material Chrome Steel
Roller Material Chrome Steel
Cage Material Steel
Dynamic Radial Load 21300 lbf
Static Radial Load 22800 lbf
Dynamic Radial Rating(90 Million Revolutions)(C90) 5520 lbf
Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 3140 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 1.3 lb

Features

How Is 3188-3120 Bearing Engineered for Reliability?

3188-3120 Bearing features chrome steel rings and rollers, ensuring strong resistance to combined loads.
Its dynamic radial load capacity reaches 21300 lbf, making it suitable for heavy-duty applications.
The steel cage maintains roller alignment, reducing friction and extending operational life.
With a temperature range of -30° to 110°C, it performs reliably in various conditions.

Structural Advantages of 3188-3120 Bearing

3188-3120 Bearing is designed with a single row tapered roller construction, ideal for combined load handling.
The precise cone and cup width tolerances ensure smooth operation and easy installation.
Its effective center location of -0.4″ enhances stability during operation.
The open seal type allows for easy lubrication, maintaining performance over time.

Why Choose 3188-3120 Bearing for Precision Tasks?

3188-3120 Bearing offers a dynamic radial rating of 5520 lbf at 90 million revolutions, ensuring long-term precision.
The chrome steel rollers and rings provide consistent performance under varying loads.
Its ABEC-1 rating guarantees reliable operation in standard precision applications.
The standard radial clearance options allow for flexibility in different operational conditions.

Application

Industrial Uses of 3188-3120 Bearing
3188-3120 Bearing is commonly used in heavy machinery like construction equipment and agricultural gear, where its tapered roller design handles combined loads efficiently. The chrome steel construction ensures durability even in tough working conditions.

In automotive applications, 3188-3120 Bearing fits well in wheel hubs and drivetrains, providing reliable performance under varying loads. Its imperial sizing makes it a straightforward replacement for many North American vehicle models.

For industrial conveyor systems, 3188-3120 Bearing’s open design allows easy lubrication, extending service life in high-load scenarios. The standard radial clearance offers flexibility for different operational needs.

What Makes 3188-3120 Bearing a Preferred Choice?
3188-3120 Bearing stands out in machinery requiring precise radial and thrust load management, such as gearboxes and pumps. Its steel cage adds robustness without compromising on smooth operation.

The bearing’s compatibility with Timken equivalents makes it a cost-effective option for maintenance and repairs. Its ABEC-1 rating ensures consistent performance for general industrial applications.

Built for Heavy-Duty Use: 3188-3120 Bearing
3188-3120 Bearing excels in mining equipment, where its tapered rollers distribute loads evenly under harsh conditions. The chrome steel rollers resist wear, reducing downtime.

In forestry machinery, 3188-3120 Bearing handles shock loads and misalignment with ease. Its standard lubrication requirement simplifies maintenance in remote locations.

Automotive vs Aerospace: Applications of 3188-3120 Bearing
In automotive settings, 3188-3120 Bearing is ideal for axles and transmissions, balancing thrust and radial loads effectively. Its inch measurements align with many US-made components.

While not typically used in aerospace, 3188-3120 Bearing finds niche roles in ground support equipment. Its temperature range suits most outdoor operational environments.