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

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

The 749A-742 is a single-row tapered roller bearing with a 3.25″ bore and 5.909″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 84700 lbf radially and 12200 lbf in thrust, making it a versatile choice.

Its open design allows for easy lubrication, while the steel cage ensures durability. 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 heavy-duty applications like industrial gearboxes or vehicle axles where combined loads are common.

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

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Product Parameters

  • Part Number 749A-742
  • Brand TFL
  • Interchangeable Timken
  • Size 3.25" x 5.909" x 1.75"
  • 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 1.75"
  • 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 742
  • 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

How Is 749A-742 Bearing Engineered for Reliability?

749A-742 Bearing features chrome steel rings and rollers, ensuring strong resistance to combined loads.
Its dynamic radial load capacity reaches 84,700 lbf, making it suitable for 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 reliably in various environments.

Designed with standard radial clearance, 749A-742 Bearing offers flexibility for different applications.
Its single-row tapered roller construction ensures efficient load distribution and smooth operation.

Application

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

In automotive applications, 749A-742 Bearing fits well in truck wheel hubs and differential systems, providing reliable performance under high radial and thrust loads. Its inch sizing makes it a preferred choice for American-made vehicles.

For industrial conveyor systems, 749A-742 Bearing’s open design allows for easy lubrication, extending service life in continuous operation. The steel cage adds strength, making it suitable for high-load scenarios.

Where Is 749A-742 Bearing Used?
You’ll often find 749A-742 Bearing in agricultural machinery, like tractors and harvesters, where its robust design handles rough terrain and heavy loads. The standard radial clearance ensures smooth rotation.

In manufacturing plants, 749A-742 Bearing supports machinery like presses and rollers, thanks to its high dynamic load capacity. The ABEC-1 rating balances precision and cost for general industrial use.

Built for Heavy-Duty Use: 749A-742 Bearing
749A-742 Bearing excels in forestry equipment, such as log splitters and sawmills, where its tapered rollers manage uneven loads. The temperature range suits both cold and moderate climates.

For railway applications, 749A-742 Bearing’s durability makes it ideal for freight car axles. The Timken interchangeability simplifies maintenance and replacements.

Automotive vs Aerospace: Applications of 749A-742 Bearing
In automotive settings, 749A-742 Bearing is trusted for drivetrain components, offering a balance of strength and affordability. The inch measurements align with standard US automotive specs.

For aerospace ground support equipment, 749A-742 Bearing’s reliability shines in tow tractors and loaders. Its compliance with RoHS and REACH standards ensures environmental safety.

Q&A

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