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TS (Single Row Tapered Roller Bearings) (Imperial) 749-743

TS (Single Row Tapered Roller Bearings) (Imperial) 749-743

The 749-743 is a single-row tapered roller bearing with a 3.3475″ bore and 5.9055″ outer diameter, crafted from sturdy chrome steel. It manages combined loads up to 84700 lbf radially and 12200 lbf in thrust, suitable for heavy-duty use.

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

This model is interchangeable with Timken bearings, making it a practical choice for replacements. Ideal for applications like truck axles or industrial gearboxes where combined loads are common.

Weighing 7.100 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards for safe and reliable performance.

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Product Parameters

  • Part Number 749-743
  • Brand TFL
  • Interchangeable Timken
  • Size 3.3475" x 5.9055" x 1.7502"
  • Bore Dia 3.3475"
  • Bore Dia Tolerance +0.001" to 0
  • Outer Dia 5.9055"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 1.8375"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 1.378"
  • 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 743
  • 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 749-743 Bearing

749-743 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 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.

749-743 Bearing’s standard radial clearance allows for smooth operation under different load conditions.
Its tapered roller design efficiently handles both radial and thrust loads.

The bearing requires regular lubrication to maintain optimal performance.
Its ABEC-1 rating ensures consistent precision for industrial applications.

Application

Industrial Uses of 749-743 Bearing
The 749-743 Bearing is commonly used in heavy machinery, such as construction equipment and mining gear, where its tapered roller design handles combined loads effectively. Its chrome steel construction ensures durability even in tough working conditions.

In automotive applications, 749-743 Bearing fits well in wheel hubs and differential systems, providing reliable performance under high stress. The inch sizing makes it a good match for American-made vehicles and industrial equipment.

For conveyor systems, 749-743 Bearing’s open design allows for easy lubrication, extending its service life in continuous operation. The steel cage adds extra strength, making it suitable for high-load scenarios.

Where Is 749-743 Bearing Used?
You’ll often find 749-743 Bearing in agricultural machinery, like tractors and harvesters, where its robust design handles uneven loads. The ABEC-1 rating ensures consistent performance without over-engineering.

In industrial fans, 749-743 Bearing supports smooth rotation, even at moderate speeds. Its standard radial clearance makes it versatile for various applications, from ventilation systems to processing equipment.

Built for Heavy-Duty Use: 749-743 Bearing
The 749-743 Bearing excels in gearboxes, where its tapered rollers manage both radial and thrust loads efficiently. Its temperature range of -30° to 110°C suits most industrial environments.

For pulp and paper machinery, 749-743 Bearing’s steel cage and chrome steel rollers resist wear in humid conditions. The open design simplifies maintenance, reducing downtime in production lines.

Automotive vs Aerospace: Applications of 749-743 Bearing
In automotive settings, 749-743 Bearing is ideal for drivetrains, offering reliable performance under heavy loads. Its inch measurements align with standard US automotive components.

For aerospace ground equipment, 749-743 Bearing handles precise movements in loading systems. While not for flight use, its durability makes it a practical choice for support machinery.

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