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TS (Single Row Tapered Roller Bearings) (Imperial) 78255X-78551

TS (Single Row Tapered Roller Bearings) (Imperial) 78255X-78551

The 78255X-78551 is a single-row tapered roller bearing with a 2.56″ bore and 5.51″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 45600 lbf radially and 17500 lbf thrust, making it a robust choice for heavy-duty applications.

Its open design allows for easy lubrication, while the steel cage ensures durability under high stress. 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 use in industrial machinery, automotive systems, or construction equipment where combined loads are common.

Weighing 5.2 lb, it’s built to last while meeting RoHS and REACH standards for safe usage. The standard radial clearance ensures straightforward installation and maintenance.

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Product Parameters

  • Part Number 78255X-78551
  • Brand TFL
  • Interchangeable Timken
  • Size 2.5586" x 5.513" x 1.4375"
  • Bore Dia 2.5586"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 5.513"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 1.2962"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 0.926"
  • Cup Width Tolerance +0.002" to -0.01
  • Width 1.4375"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.14"
  • Cup Backface ToClear Radius 0.090"
  • Cone Frontface Backing Diameter 3.78"
  • Cone Backface Backing Diameter 3.5"
  • Cup Frontface Backing Diameter 5.22"
  • Cup Backface Backing Diameter 4.61"
  • Cage Cone Frontface Clearance 0.22"
  • Cage Cone Backface Clearance 0.24"
  • Effective Center Location 0.31"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 78255X
  • Cup Part Number 78551
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Cups Type Standard
  • Series 78000
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 45600 lbf
  • Static Radial Load 43400 lbf
  • Dynamic Radial Rating(90 Million Revolutions)(C90) 11800 lbf
  • Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 17500 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 5.2 lb

Features

How Is 78255X-78551 Bearing Engineered for Reliability?

78255X-78551 Bearing features a single-row tapered roller design, ideal for handling combined loads with ease.
Its chrome steel construction ensures durability and resistance to wear in demanding conditions.

The bearing’s dynamic radial load capacity reaches 45,600 lbf, providing reliable performance under heavy loads.
With a standard radial clearance, it offers flexibility for various applications.

78255X-78551 Bearing operates efficiently within a temperature range of -30° to 110°C.
Its steel cage maintains roller alignment, ensuring smooth operation and extended service life.

The open seal design simplifies lubrication, reducing maintenance needs.
This makes 78255X-78551 Bearing a practical choice for industrial applications.

Application

Industrial Uses of 78255X-78551 Bearing
78255X-78551 Bearing is commonly used in heavy machinery, such as construction equipment and mining tools, where its tapered roller design handles combined loads efficiently. The chrome steel construction ensures durability even in demanding environments.

Where Is 78255X-78551 Bearing Used?
In automotive applications, 78255X-78551 Bearing supports wheel hubs and differential systems, providing reliable performance under both radial and thrust loads. Its imperial sizing makes it a good fit for North American vehicle models.

Built for Heavy-Duty Use: 78255X-78551 Bearing
78255X-78551 Bearing excels in industrial gearboxes, where its single-row design simplifies installation and maintenance. The steel cage adds strength, making it suitable for high-load scenarios.

Automotive vs Aerospace: Applications of 78255X-78551 Bearing
78255X-78551 Bearing is versatile enough for automotive drivetrains and aerospace landing gear, thanks to its robust construction. The open seal type allows for easy lubrication, extending its service life.

Key Fields for 78255X-78551 Bearing
78255X-78551 Bearing is a reliable choice for agricultural machinery, such as tractors and harvesters, where its tapered rollers manage varying loads. The ABEC-1 rating ensures consistent performance without unnecessary precision costs.

Q&A

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