TS (Single Row Tapered Roller Bearings) (Imperial) 3778-3720

The 3778-3720 is a single-row tapered roller bearing with a 1.875″ bore and 3.6718″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 27500 lbf radially and 4120 lbf thrust, making it versatile for various applications.

Its open design allows for easy lubrication, while the steel cage ensures durability under heavy use. 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 systems where combined loads are common.

Weighing 1.9 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it meets international safety requirements.

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Description

Features

Application

Q&A

Product Parameters

Part Number 3778-3720
Brand TFL
Interchangeable Timken
Size 1.875" x 3.6718" x 1.1875"
Bore Dia 1.875"
Bore Dia Tolerance +0.005" to 0
Outer Dia 3.6718"
Outer Dia Tolerance +0.001" to 0
Cone Width 1.193"
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 0.25"
Cup Backface ToClear Radius 0.130"
Cone Frontface Backing Diameter 2.17"
Cone Backface Backing Diameter 2.64"
Cup Frontface Backing Diameter 3.50"
Cup Backface Backing Diameter 3.23"
Cage Cone Frontface Clearance 0.06"
Cage Cone Backface Clearance 0.06"
Effective Center Location -0.32"
System of Measurement Inch
Type Bearing
Cone Part Number 3778
Cup Part Number 3720
Bearing Type Roller
Roller Bearing Type Tapered
For Load Direction Combined
Construction Single Row
Seal Type Open
Cups Type Standard
Series 3700
Ring Material Chrome Steel
Roller Material Chrome Steel
Cage Material Steel
Dynamic Radial Load 27500 lbf
Static Radial Load 34300 lbf
Dynamic Radial Rating(90 Million Revolutions)(C90) 7120 lbf
Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 4120 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

How Does 3778-3720 Bearing Handle Combined Loads?

3778-3720 Bearing is built with chrome steel rings and rollers, offering strong resistance to both radial and thrust loads.
Its dynamic radial load capacity reaches 27,500 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.

What Makes 3778-3720 Bearing Durable?

3778-3720 Bearing features chrome steel construction, enhancing its resistance to wear and tear.
The tapered roller design distributes loads evenly, improving longevity under heavy use.
Its standard radial clearance options allow for flexibility in different applications.
This bearing is also RoHS and REACH compliant, meeting international standards.

Engineered for Precision: 3778-3720 Bearing

3778-3720 Bearing’s single-row tapered design ensures precise load handling and smooth operation.
The chrome steel rollers and rings provide consistent performance even under high stress.
With an ABEC-1 rating, it balances accuracy and durability for industrial use.
Its effective center location of -0.32″ helps maintain stability in complex assemblies.

Application

Industrial Uses of 3778-3720 Bearing
3778-3720 Bearing is commonly used in heavy machinery like construction equipment, where its tapered roller design handles combined loads effectively. The chrome steel construction ensures durability even in demanding environments.

In automotive applications, 3778-3720 Bearing fits well in wheel hubs and differential systems, providing reliable performance under varying loads. Its imperial sizing makes it a preferred choice for American-made vehicles.

For industrial fans and pumps, 3778-3720 Bearing’s open design allows for easy lubrication, extending service life. The steel cage adds stability, making it suitable for high-speed operations.

Where Is 3778-3720 Bearing Used?
You’ll often find 3778-3720 Bearing in agricultural machinery, where its robust design handles rough conditions. The tapered rollers manage both radial and thrust loads with ease.

In conveyor systems, 3778-3720 Bearing ensures smooth operation under heavy loads. Its standard radial clearance makes it versatile for various industrial settings.

Built for Heavy-Duty Use: 3778-3720 Bearing
3778-3720 Bearing excels in mining equipment, where its high dynamic load capacity is crucial. The chrome steel rollers resist wear, even in abrasive environments.

For gearboxes, 3778-3720 Bearing provides consistent performance under combined loads. Its ABEC-1 rating ensures reliable precision for general industrial use.

Automotive vs Aerospace: Applications of 3778-3720 Bearing
In automotive systems, 3778-3720 Bearing supports wheel assemblies, offering durability and load capacity. Its imperial sizing aligns with standard vehicle specifications.

For aerospace ground equipment, 3778-3720 Bearing handles heavy loads in landing gear test rigs. The temperature range suits various operational conditions.