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

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

The 749A-742X is a single-row tapered roller bearing with a 3.25″ bore and 5.909″ outer diameter, crafted from durable chrome steel. It handles combined loads up to 84700 lbf radial and 12200 lbf thrust, making it robust for heavy-duty use.

Its open design allows easy lubrication, while the steel cage ensures reliable performance. The bearing operates smoothly in temperatures ranging from -30°C to 110°C.

This model is interchangeable with Timken bearings, offering a practical replacement option. Ideal for applications like industrial gearboxes or vehicle axles where combined loads are common.

Weighing 7.4 lb, it’s sturdy yet manageable for its size. Compliant with RoHS and REACH standards, it’s a safe choice for various industrial uses.

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Product Parameters

  • Part Number 749A-742X
  • Brand TFL
  • Interchangeable Timken
  • Size 3.25" x 5.909" x 1.7502"
  • Bore Dia 3.25"
  • Bore Dia Tolerance +0.001" to 0
  • Outer Dia 5.909"
  • 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 4.43"
  • Cone Backface Backing Diameter 3.9"
  • 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 749A
  • Cup Part Number 742X
  • 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 7.400 lb

Features

Performance Features of 749A-742X Bearing

749A-742X Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 84,700 lbf, ensuring reliable performance in demanding conditions.
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 environments.

How Is 749A-742X Bearing Engineered for Reliability?

749A-742X Bearing features precise cone and cup width tolerances, ensuring consistent performance.
The tapered roller design distributes loads evenly, enhancing durability under stress.
Its standard radial clearance options provide flexibility for different applications.
Lubrication is required to maintain smooth operation and prolong service life.

Built for Durability: 749A-742X Bearing

749A-742X Bearing’s chrome steel construction resists wear, even under heavy radial and thrust loads.
The single-row design simplifies installation while maintaining high load capacity.
With an ABEC-1 rating, it balances precision and cost-effectiveness.
Its open seal type allows for easy lubrication access, reducing maintenance efforts.

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

749A-742X Bearing uses chrome steel for both rings and rollers, providing excellent strength.
This material choice ensures reliable performance in high-load industrial applications.
The steel cage offers durability while keeping manufacturing costs reasonable.
Unlike ceramic options, it provides a cost-effective solution without compromising on load capacity.

Application

Industrial Uses of 749A-742X Bearing
You’ll often spot 749A-742X Bearing in heavy machinery like construction equipment, where its tapered roller design handles combined loads effortlessly. The chrome steel construction ensures it stands up to tough conditions without wearing out quickly.

In automotive applications, 749A-742X Bearing is a go-to for wheel hubs and differential systems, thanks to its robust load capacity. The imperial sizing makes it a perfect fit for North American vehicle models.

For industrial fans and pumps, 749A-742X Bearing’s open design allows for easy lubrication, keeping operations smooth. Its steel cage adds durability, making it reliable for continuous use.

Where Is 749A-742X Bearing Used?
749A-742X Bearing shines in agricultural machinery, particularly in gearboxes and PTO shafts. Its tapered rollers distribute loads evenly, reducing stress on components.

You’ll also find it in mining equipment, where its high dynamic radial load rating keeps things running under extreme conditions. The standard radial clearance offers flexibility for various setups.

Built for Heavy-Duty Use: 749A-742X Bearing
749A-742X Bearing is a staple in forestry equipment, handling the rough terrain and heavy loads with ease. The chrome steel rollers provide long-lasting performance.

In material handling systems, this bearing’s single-row design simplifies maintenance while delivering reliable operation. Its ABEC-1 rating ensures consistent precision for most industrial needs.

Automotive vs Aerospace: Applications of 749A-742X Bearing
In automotive systems, 749A-742X Bearing supports drivetrain components, offering durability and smooth performance. Its imperial measurements align well with standard vehicle designs.

For aerospace ground equipment, this bearing’s temperature range and load capacity make it suitable for support machinery. However, it’s not typically used in-flight due to its ABEC-1 rating.

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