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TS (Single Row Tapered Roller Bearings) (Imperial) 749-742A

TS (Single Row Tapered Roller Bearings) (Imperial) 749-742A

The 749-742A is a single-row tapered roller bearing with a 3.35″ bore and 5.9″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 84,700 lbf radially and 12,200 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, suitable for various industrial environments.

This model is interchangeable with Timken bearings, offering a reliable replacement option. Ideal for use in gearboxes, wheel hubs, or machinery where combined radial and thrust loads are common.

Weighing 7.1 lb, it’s built to last while complying with RoHS and REACH standards for safety and environmental friendliness. The standard radial clearance ensures easy installation and maintenance.

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Product Parameters

  • Part Number 749-742A
  • Brand TFL
  • Interchangeable Timken
  • Size 3.3475" x 5.9045" x 1.7502"
  • Bore Dia 3.3475"
  • Bore Dia Tolerance +0.001" to 0
  • Outer Dia 5.9045"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 1.8375"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 1.4375"
  • Cup Width Tolerance +0.002" to -0.01
  • Width 1.7502"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.14"
  • Cup Backface ToClear Radius 0.130"
  • Cone Frontface Backing Diameter 4.46"
  • Cone Backface Backing Diameter 3.98"
  • Cup Frontface Backing Diameter 5.63"
  • Cup Backface Backing Diameter 5.28"
  • Cage Cone Frontface Clearance 0.08"
  • Cage Cone Backface Clearance 0.05"
  • Effective Center Location -0.47"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 749
  • Cup Part Number 742A
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Cups Type Standard
  • Series 745
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 84700 lbf
  • Static Radial Load 93800 lbf
  • Dynamic Radial Rating(90 Million Revolutions)(C90) 21900 lbf
  • Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 12200 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 7.100 lb

Features

Performance Features of 749-742A Bearing

749-742A Bearing is constructed with chrome steel rings and rollers, offering robust performance under combined loads.
Its dynamic radial load capacity reaches 84,700 lbf, making it suitable for heavy-duty applications.
The steel cage ensures proper roller alignment, reducing friction and enhancing durability.
With a temperature range of -30° to 110°C, it performs reliably in various operating conditions.

How Is 749-742A Bearing Engineered for Reliability?

749-742A Bearing features precise cone and cup width tolerances, ensuring consistent performance.
The tapered roller design distributes loads evenly, minimising wear and extending service life.
Its standard radial clearance options provide flexibility for different application needs.
Lubrication is required to maintain smooth operation and reduce maintenance intervals.

Built for Durability: 749-742A Bearing

749-742A Bearing’s chrome steel construction resists wear, even under high dynamic thrust loads.
The open seal type allows for easy lubrication access, ensuring optimal performance.
With a static radial load capacity of 93,800 lbf, it handles demanding industrial environments.
Its ABEC-1 rating ensures reliable precision for various mechanical applications.

Steel vs Ceramic Bearings: Strengths of 749-742A Bearing

749-742A Bearing uses chrome steel rollers and rings, providing excellent strength and durability.
The tapered roller design efficiently manages both radial and thrust loads in a single row.
Its effective centre location of -0.47″ ensures stable operation under varying load conditions.
Weighing 7.100 lb, it balances robustness with manageable installation requirements.

Application

Industrial Uses of 749-742A Bearing
749-742A Bearing is commonly used in heavy machinery like construction equipment, where its tapered roller design handles combined loads effectively. The chrome steel construction ensures durability in demanding environments.

In automotive applications, 749-742A 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, 749-742A Bearing’s open design allows for easy lubrication, extending its service life. The steel cage adds strength, making it suitable for high-load scenarios.

Where Is 749-742A Bearing Used?
749-742A Bearing is often found in agricultural machinery, supporting components like gearboxes and PTO shafts. Its robust design handles the rough conditions of farm equipment.

In mining operations, 749-742A Bearing excels in crushers and screens, where its high dynamic load capacity is essential. The standard radial clearance ensures smooth operation even under heavy stress.

Built for Heavy-Duty Use: 749-742A Bearing
749-742A Bearing is ideal for forestry equipment, such as log splitters and harvesters, where its tapered rollers manage intense loads. The ABEC-1 rating ensures consistent performance.

In material handling systems, 749-742A Bearing’s compatibility with Timken models makes it a versatile choice. The inch measurements simplify replacements in existing setups.

Automotive vs Aerospace: Applications of 749-742A Bearing
749-742A Bearing is widely used in truck axles, offering reliable support for heavy loads. Its chrome steel rollers withstand the rigors of long-haul transportation.

In aerospace ground equipment, 749-742A Bearing’s temperature range suits various operational conditions. The standard lubrication requirement ensures easy maintenance.

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