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TS (Single Row Tapered Roller Bearings) (Imperial) 34300-34478RB

TS (Single Row Tapered Roller Bearings) (Imperial) 34300-34478RB

The 34300-34478RB is a single-row tapered roller bearing with a 3″ bore and 4.7812″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 23000 lbf radially and 4600 lbf 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 2.1 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it’s a safe choice for most environments.

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Product Parameters

  • Part Number 34300-34478RB
  • Brand TFL
  • Interchangeable Timken
  • Size 3" x 4.7812" x 0.9688"
  • Bore Dia 3"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 4.7812"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 0.906"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 0.6875"
  • Cup Width Tolerance +0.002" to -0.01
  • Width 0.9688"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.080"
  • Cup Backface ToClear Radius 0.08"
  • Cone Frontface Backing Diameter 4.02"
  • Cone Backface Backing Diameter 3.39"
  • Cup Frontface Backing Diameter 4.60"
  • Cup Backface Backing Diameter 4.33"
  • Cage Cone Frontface Clearance 0.1"
  • Cage Cone Backface Clearance 0.09"
  • Effective Center Location 0.06"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 34300
  • Cup Part Number 34478RB
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Cups Type Standard
  • Series 34000
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 23000 lbf
  • Static Radial Load 30600 lbf
  • Dynamic Radial Rating(90 Million Revolutions)(C90) 5960 lbf
  • Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 4600 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 2.1 lb

Features

Performance Features of 34300-34478RB Bearing

34300-34478RB Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 23,000 lbf, ensuring reliable performance in heavy-duty 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 various environmental conditions.

34300-34478RB Bearing requires lubrication but offers standard radial clearance options for flexibility.
Its single-row tapered design provides stability and efficiency in demanding setups.

Application

Industrial Uses of 34300-34478RB Bearing
34300-34478RB Bearing is commonly used in heavy machinery, such as construction equipment and mining tools, where its tapered roller design handles combined loads effectively. The chrome steel construction ensures durability in demanding environments.

In automotive applications, 34300-34478RB 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, 34300-34478RB Bearing’s open design allows for easy lubrication, extending its service life in continuous operation. The steel cage adds stability, reducing wear over time.

Where Is 34300-34478RB Bearing Used?
34300-34478RB Bearing can be found in agricultural machinery, supporting components like gearboxes and PTO shafts. Its robust design handles the rough conditions typical in farming operations.

The bearing also suits railway applications, where its tapered rollers manage both radial and thrust loads in railcar axles. The ABEC-1 rating ensures consistent performance at moderate speeds.

Built for Heavy-Duty Use: 34300-34478RB Bearing
34300-34478RB Bearing excels in forestry equipment, such as log splitters and sawmills, thanks to its high static radial load capacity. The standard radial clearance offers flexibility for different operating conditions.

In material handling systems, this bearing’s steel cage and chrome steel rollers provide long-lasting performance. Its compatibility with Timken models makes replacements straightforward.

Automotive vs Aerospace: Applications of 34300-34478RB Bearing
In automotive settings, 34300-34478RB Bearing is ideal for drivetrain components, balancing loads in transmissions and axles. Its temperature range suits both cold and moderate climates.

For aerospace ground support equipment, the bearing’s inch measurements align with many US-made tools. However, its ABEC-1 rating limits its use in high-precision flight systems.

What Makes 34300-34478RB Bearing a Preferred Choice?
34300-34478RB Bearing stands out in industrial fans and blowers, where its tapered rollers manage axial and radial forces efficiently. The open seal design simplifies maintenance routines.

Its compatibility with Timken equivalents also reduces downtime during replacements. The bearing’s weight and dimensions make it easy to integrate into existing machinery.

Q&A

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