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

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

The 3872A-3821 is a single-row tapered roller bearing with a 1.375″ bore and 3.375″ outer diameter, crafted from robust chrome steel. It handles combined loads up to 27900 lbf radially and 4980 lbf in 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 just 2lb, it’s sturdy yet manageable for its size. Compliant with RoHS and REACH standards, it’s a safe choice for diverse environments.

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Product Parameters

  • Part Number 3872A-3821
  • Brand TFL
  • Interchangeable Timken
  • Size 1.375" x 3.375" x 1.1876"
  • 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 1.1876"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.03"
  • Cup Backface ToClear Radius 0.050"
  • Cone Frontface Backing Diameter 1.81"
  • Cone Backface Backing Diameter 1.85"
  • 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 3872A
  • 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 3872A-3821 Bearing

3872A-3821 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 27,900 lbf, making it suitable for heavy-duty applications.
The steel cage ensures proper roller alignment, enhancing durability and reducing wear.
With a temperature range of -30° to 110°C, it performs reliably in various conditions.

How Is 3872A-3821 Bearing Engineered for Reliability?

3872A-3821 Bearing features a tapered roller design, providing efficient load distribution.
The chrome steel construction resists wear, ensuring a longer service life.
Its standard radial clearance allows for smooth operation in different applications.
The bearing requires lubrication, but its robust design minimises maintenance needs.

Built for Durability: 3872A-3821 Bearing

3872A-3821 Bearing’s single-row construction ensures stability under combined loads.
The chrome steel rollers and rings enhance its resistance to wear and fatigue.
With a static radial load capacity of 33,200 lbf, it handles demanding conditions.
Its ABEC-1 rating guarantees consistent performance in various industrial settings.

Steel vs Ceramic Bearings: Strengths of 3872A-3821 Bearing

3872A-3821 Bearing uses chrome steel for both rollers and rings, offering excellent durability.
The steel cage provides reliable roller guidance, reducing friction and wear.
Its dynamic thrust rating of 4,980 lbf ensures performance in thrust applications.
The bearing’s standard radial clearance makes it versatile for different uses.

Application

Industrial Uses of 3872A-3821 Bearing
3872A-3821 Bearing is commonly used in heavy machinery like construction equipment, where its tapered roller design handles combined loads efficiently. The chrome steel construction ensures durability even in demanding environments.

In automotive applications, 3872A-3821 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 conveyor systems, 3872A-3821 Bearing’s open design allows for easy lubrication, extending its service life. The standard radial clearance offers flexibility for different operational needs.

Where Is 3872A-3821 Bearing Used?
3872A-3821 Bearing is often found in agricultural machinery, supporting components like gearboxes and PTO shafts. Its robust design handles high radial and thrust loads with ease.

In mining equipment, 3872A-3821 Bearing’s steel cage and chrome steel rollers withstand harsh conditions. The ABEC-1 rating ensures consistent performance for general industrial use.

Built for Heavy-Duty Use: 3872A-3821 Bearing
3872A-3821 Bearing excels in forestry equipment, where its tapered rollers manage uneven loads effectively. The inch sizing simplifies replacements in older machinery.

For material handling systems, 3872A-3821 Bearing’s dynamic load capacity ensures smooth operation. The standard radial clearance adapts to various installation requirements.

Automotive vs Aerospace: Applications of 3872A-3821 Bearing
In automotive drivetrains, 3872A-3821 Bearing supports high torque applications like axles and transmissions. Its combined load capability makes it versatile for different vehicle types.

For industrial pumps, 3872A-3821 Bearing’s temperature range suits both high and low-speed operations. The steel cage adds durability in wet or corrosive environments.

Q&A

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