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TS (Single Row Tapered Roller Bearings) (Imperial) 3872-3821

TS (Single Row Tapered Roller Bearings) (Imperial) 3872-3821

The 3872-3821 is a single-row tapered roller bearing with a 1.375″ bore and 3.375″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 27900 lbf radially and 4980 lbf thrust, making it versatile for various 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, suitable for demanding environments.

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 just 2lb, it balances strength and portability. Compliant with RoHS and REACH standards, it meets safety and environmental requirements.

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Product Parameters

  • Part Number 3872-3821
  • Brand TFL
  • Interchangeable Timken
  • Size 1.375" x 3.375" x 1.1875"
  • Bore Dia 1.375"
  • 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 0.14"
  • Cup Backface ToClear Radius 0.050"
  • Cone Frontface Backing Diameter 1.81"
  • Cone Backface Backing Diameter 2.09"
  • Cup Frontface Backing Diameter 3.23"
  • Cup Backface Backing Diameter 2.95"
  • 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 3872
  • Cup Part Number 3821
  • 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 2 lb

Features

Performance Features of 3872-3821 Bearing

3872-3821 Bearing is crafted 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 proper roller alignment, reducing friction and extending operational life.
With a temperature range of -30° to 110°C, it performs well in diverse environmental conditions.

3872-3821 Bearing’s standard radial clearance and ABEC-1 rating provide consistent precision.
Its tapered roller design efficiently handles both radial and thrust loads for versatile use.

Application

Industrial Uses of 3872-3821 Bearing
3872-3821 Bearing is commonly used in heavy machinery, such as 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.

What Makes 3872-3821 Bearing a Preferred Choice?
In automotive applications, 3872-3821 Bearing fits well in wheel hubs and drivetrains, offering reliable performance under both radial and thrust loads. Its imperial sizing makes it a go-to for American-made vehicles.

Built for Heavy-Duty Use: 3872-3821 Bearing
For industrial fans and pumps, 3872-3821 Bearing’s open design allows easy lubrication, extending service life in high-speed operations. The steel cage adds extra strength to withstand continuous use.

Automotive vs Aerospace: Applications of 3872-3821 Bearing
While 3872-3821 Bearing excels in truck axles and trailers due to its load capacity, it’s also found in smaller aircraft components where precision matters. The ABEC-1 rating ensures consistent performance across different environments.

Perfect Fit for Automation: 3872-3821 Bearing
In conveyor systems and packaging machines, 3872-3821 Bearing’s tapered rollers reduce friction, ensuring smooth operation. Its standard radial clearance makes it adaptable to various automation setups.

Q&A

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