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TS (Single Row Tapered Roller Bearings) (Imperial) 3878-3820

TS (Single Row Tapered Roller Bearings) (Imperial) 3878-3820

The 3878-3820 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 in 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, offering a reliable replacement option. Ideal for heavy-duty 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 for safe use.

The standard radial clearance can be adjusted to C3, C4, or C5 if needed. Its ABEC-1 rating ensures consistent performance for general industrial use.

Perfect for applications like wheel hubs or conveyor systems, where durability and load handling are key. The tapered roller design provides efficient load distribution for longer service life.

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Product Parameters

  • Part Number 3878-3820
  • Brand TFL
  • Interchangeable Timken
  • Size 1.4375" x 3.375" x 1.1875"
  • 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 1.1875"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.03"
  • Cup Backface ToClear Radius 0.130"
  • Cone Frontface Backing Diameter 1.85"
  • Cone Backface Backing Diameter 1.89"
  • Cup Frontface Backing Diameter 3.23"
  • Cup Backface Backing Diameter 2.87"
  • 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 3820
  • 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

Performance Features of 3878-3820 Bearing

3878-3820 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 27,900 lbf, ensuring reliable performance in various 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 diverse environments.

How Is 3878-3820 Bearing Engineered for Reliability?

3878-3820 Bearing features precise cone and cup dimensions, ensuring smooth operation under heavy loads.
The tapered roller design distributes stress evenly, enhancing durability and reducing wear.
Its standard radial clearance allows for flexibility in different mounting conditions.
This bearing is interchangeable with Timken models, providing convenient replacement options.

Built for Durability: 3878-3820 Bearing

3878-3820 Bearing’s chrome steel construction resists wear, making it suitable for long-term use.
The single-row design simplifies installation while maintaining high load capacity.
With a static radial load rating of 33,200 lbf, it handles demanding applications with ease.
Its ABEC-1 rating ensures consistent performance in industrial settings.

Application

Industrial Uses of 3878-3820 Bearing
3878-3820 Bearing is commonly used in heavy machinery like construction equipment and agricultural gear, where its tapered roller design handles combined loads effectively. The chrome steel construction ensures durability even in tough working conditions.

Where Is 3878-3820 Bearing Used?
You’ll often find 3878-3820 Bearing in automotive applications, particularly in wheel hubs and differential systems. Its precise imperial sizing makes it a reliable choice for older or custom vehicle models.

Built for Heavy-Duty Use: 3878-3820 Bearing
3878-3820 Bearing excels in industrial fans and pumps, thanks to its ability to manage both radial and thrust loads. The open design allows for easy lubrication, extending its service life.

Automotive vs Aerospace: Applications of 3878-3820 Bearing
In automotive settings, 3878-3820 Bearing supports drivetrain components, while in aerospace, it’s suited for auxiliary systems requiring robust performance. The steel cage adds stability under varying temperatures.

Key Fields for 3878-3820 Bearing
3878-3820 Bearing is ideal for conveyor systems and material handling equipment, where its standard radial clearance ensures smooth operation. The ABEC-1 rating balances precision and cost-effectiveness for general industrial use.

Q&A

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