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TS (Single Row Tapered Roller Bearings) (Imperial) 3378-3331

TS (Single Row Tapered Roller Bearings) (Imperial) 3378-3331

The 3378-3331 is a single-row tapered roller bearing with a 1.4365″ bore and 3.1562″ outer diameter, crafted from sturdy chrome steel. It manages combined loads up to 25800 lbf radially and 3130 lbf thrust, suitable for demanding applications.

Its open design allows 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. Ideal for heavy-duty machinery or automotive systems where combined loads are common.

Weighing 1.6 lb, it offers a balance of strength and manageability. Compliant with RoHS and REACH standards for safe use.

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Product Parameters

  • Part Number 3378-3331
  • Brand TFL
  • Interchangeable Timken
  • Size 1.4365" x 3.1562" x 1.1563"
  • Bore Dia 1.4365"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 3.1562"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 1.1965"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 0.9375"
  • Cup Width Tolerance +0.002" to -0.01
  • Width 1.1563"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.14"
  • Cup Backface ToClear Radius 0.03"
  • Cone Frontface Backing Diameter 1.69"
  • Cone Backface Backing Diameter 1.95"
  • Cup Frontface Backing Diameter 2.95"
  • Cup Backface Backing Diameter 2.83"
  • Cage Cone Frontface Clearance 0.07"
  • Cage Cone Backface Clearance 0.06"
  • Effective Center Location -0.43"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 3378
  • Cup Part Number 3331
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Cups Type Standard
  • Series 3300
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 25800 lbf
  • Static Radial Load 29100 lbf
  • Dynamic Radial Rating(90 Million Revolutions)(C90) 6700 lbf
  • Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 3130 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 1.6 lb

Features

Performance Features of 3378-3331 Bearing

3378-3331 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 25,800 lbf, ensuring reliable performance in 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 well in various environmental conditions.

How Is 3378-3331 Bearing Engineered for Reliability?

3378-3331 Bearing features a tapered roller design, optimised for handling both radial and thrust loads.
The chrome steel construction enhances durability, while the standard radial clearance ensures smooth operation.
Its effective center location at -0.43″ improves load distribution, reducing wear over time.
Lubrication is required to maintain peak performance, ensuring long service intervals.

Built for Durability: 3378-3331 Bearing

3378-3331 Bearing’s single-row construction provides stability under high combined loads.
The steel cage and chrome steel rollers work together to minimise friction and noise.
With a static radial load capacity of 29,100 lbf, it excels in demanding industrial applications.
Its ABEC-1 rating ensures consistent precision for reliable operation.

Steel vs Ceramic Bearings: Strengths of 3378-3331 Bearing

3378-3331 Bearing uses chrome steel for both rings and rollers, offering excellent strength and wear resistance.
The tapered roller design efficiently manages combined loads, making it versatile for various applications.
Its dynamic thrust rating of 3,130 lbf ensures reliable performance under axial forces.
The open seal type allows for easy lubrication, maintaining optimal performance over time.

Why Choose 3378-3331 Bearing for Precision Tasks?

3378-3331 Bearing’s precise cone and cup dimensions ensure accurate load distribution.
The standard radial clearance option provides flexibility for different operational needs.
With a dynamic radial rating of 6,700 lbf at 90 million revolutions, it delivers long-lasting reliability.
Its compatibility with Timken bearings makes it a practical choice for replacements.

Application

Industrial Uses of 3378-3331 Bearing
3378-3331 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 in rugged environments.

In automotive applications, 3378-3331 Bearing fits well in wheel hubs and differential systems, providing reliable performance under varying loads. Its imperial sizing makes it a preferred choice for North American vehicle models.

For industrial conveyors, 3378-3331 Bearing’s open design allows for easy lubrication, extending service life in high-load scenarios. The steel cage adds stability during continuous operation.

Where Is 3378-3331 Bearing Used?
You’ll often find 3378-3331 Bearing in agricultural machinery, such as tractors and harvesters, where its robust design withstands dusty conditions. The standard radial clearance ensures smooth rotation.

In mining equipment, 3378-3331 Bearing’s ability to handle dynamic radial loads makes it ideal for crushers and screens. The ABEC-1 rating balances precision and cost-effectiveness for these applications.

Built for Heavy-Duty Use: 3378-3331 Bearing
3378-3331 Bearing excels in forestry equipment like log splitters, where its tapered rollers manage heavy thrust and radial loads. The chrome steel rollers resist wear even under constant stress.

For railway applications, 3378-3331 Bearing’s effective center location helps maintain alignment in bogies and axles. The steel cage provides additional strength for long-haul operations.

Automotive vs Aerospace: Applications of 3378-3331 Bearing
In automotive systems, 3378-3331 Bearing is often used in truck transmissions, where its combined load capacity ensures smooth gear shifts. The inch sizing simplifies replacements in older models.

For aerospace ground equipment, 3378-3331 Bearing’s temperature range suits tugs and loaders operating in varying climates. The open design allows for regular maintenance checks.

Q&A

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