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TS (Single Row Tapered Roller Bearings) (Imperial) 6387-6321

TS (Single Row Tapered Roller Bearings) (Imperial) 6387-6321

The 6387-6321 is a single-row tapered roller bearing with a 2.25″ bore and 5.1875″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 72300 lbf radial and 10400 lbf thrust, making it versatile for heavy-duty use.

Its open design allows for easy lubrication, while the steel cage ensures durability under high stress. The bearing operates smoothly in temperatures from -30°C to 110°C.

This model is interchangeable with Timken bearings, offering a reliable replacement option. Ideal for industrial machinery or automotive applications where combined loads are common.

Weighing 8.1 lb, it’s built to last with standard radial clearance options. Compliant with RoHS and REACH standards for safe and eco-friendly use.

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Product Parameters

  • Part Number 6387-6321
  • Brand TFL
  • Interchangeable Timken
  • Size 2.25" x 5.1875" x 2.125"
  • Bore Dia 2.25"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 5.1875"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 2.205"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 1.75"
  • Cup Width Tolerance +0.002" to -0.01
  • Width 2.125"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.03"
  • Cup Backface ToClear Radius 0.130"
  • Cone Frontface Backing Diameter 2.83"
  • Cone Backface Backing Diameter 2.83"
  • Cup Frontface Backing Diameter 4.96"
  • Cup Backface Backing Diameter 4.53"
  • Cage Cone Frontface Clearance 0.05"
  • Cage Cone Backface Clearance 0.13"
  • Effective Center Location -0.76"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 6387
  • Cup Part Number 6321
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Cups Type Standard
  • Series 6300
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 72300 lbf
  • Static Radial Load 90900 lbf
  • Dynamic Radial Rating(90 Million Revolutions)(C90) 18700 lbf
  • Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 10400 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 8.1 lb

Features

Performance Features of 6387-6321 Bearing

6387-6321 Bearing is constructed with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 72,300 lbf, making it suitable for heavy-duty applications.

The steel cage ensures proper roller alignment, reducing friction and enhancing durability.
With a standard radial clearance, it provides reliable performance in various operating conditions.

6387-6321 Bearing operates efficiently within a temperature range of -30° to 110°C.
Its tapered roller design ensures smooth operation under both radial and thrust loads.

The open seal type allows for easy lubrication, maintaining optimal performance.
Weighing 8.1 lb, it balances strength and practicality for industrial use.

Application

Industrial Uses of 6387-6321 Bearing
You’ll often spot 6387-6321 Bearing in heavy machinery like construction equipment, where its tapered roller design handles combined radial and thrust loads effortlessly. The chrome steel construction gives it lasting durability in tough environments.

Where Is 6387-6321 Bearing Used?
In automotive applications, 6387-6321 Bearing works well in wheel hubs and differential systems, thanks to its precise imperial measurements. The steel cage keeps everything running smoothly even under heavy loads.

Built for Heavy-Duty Use: 6387-6321 Bearing
This bearing shines in industrial gearboxes, where its single-row design simplifies maintenance. The standard radial clearance makes it adaptable to various operating conditions.

Automotive vs Aerospace: Applications of 6387-6321 Bearing
While 6387-6321 Bearing is common in truck axles, its ABEC-1 rating also suits less demanding aerospace components. The inch sizing makes it a natural fit for North American machinery.

Perfect Fit for Automation: 6387-6321 Bearing
In conveyor systems, 6387-6321 Bearing’s tapered rollers handle misalignment better than many alternatives. The open design allows for easy lubrication during routine maintenance checks.

Q&A

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