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644-632D TDO (Two-Row Double-Outer Race) (Imperial)

644-632D TDO (Two-Row Double-Outer Race) (Imperial)

The 644-632D is a double-row tapered roller bearing with a 2.8125″ bore and 5.375″ outer diameter, built from sturdy chrome steel. It handles combined loads up to 108,000 lbf and is designed for long-lasting performance.

Its open design allows for easy lubrication, while the steel cage ensures smooth operation. The bearing works well in temperatures ranging from -30°C to 110°C, making it versatile for various conditions.

This model is part of the 635 series and comes with standard radial clearance, though C3/C4/C5 options are available. Ideal for heavy-duty applications like industrial gearboxes or vehicle axles where robust load handling is needed.

Weighing 12.34 lb, it’s a solid choice for machinery requiring reliable performance. Compliant with RoHS and REACH standards for safe use.

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Product Parameters

  • Part Number 644-632D
  • Brand TFL
  • Size 2.8125" x 5.375" x 1.625"
  • Bore Dia 2.8125"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 5.375"
  • Outer Dia Tolerance +0.001" to 0
  • Double Cup Width 3"
  • Double Cup Width Tolerance +0.003" to -0.01
  • Cone Width 1.625"
  • Cone Width Tolerance +0.002" to -0.01
  • Bearing Width Across Cups 3.75"
  • Bearing Width Across Cups Tolerance +0.008" to 0
  • Cup Backface ToClear Radius 0.06"
  • Cone Backface Backing Diameter 3.43"
  • Cup Frontface Backing Diameter 4.96"
  • Cage Cone Backface Clearance 0.15"
  • Dynamic Radial Load 108000 lbf
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 644
  • Cup Part Number 632D
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Double Row
  • Seal Type Open
  • Cups Type Standard
  • Series 635
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Rating(One Row 90 Million Revolutions) 16100 lbf
  • Dynamic Thrust Rating(90 Million Revolutions) 9980 lbf
  • Dynamic Radial Rating(Two Row 90 Million Revolutions) 28000 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 12.34 lb

Features

How Does 644-632D Bearing Handle Combined Loads?

644-632D Bearing features a double-row tapered roller design, making it suitable for combined radial and thrust loads.
Its chrome steel construction ensures durability, with a dynamic radial load capacity of 108,000 lbf.
The steel cage maintains roller alignment, reducing friction and extending bearing life.
With a standard radial clearance, it offers reliable performance in various industrial applications.

What Makes 644-632D Bearing Durable?

644-632D Bearing is built with chrome steel rings and rollers, providing excellent resistance to wear.
Its double-row design distributes loads evenly, enhancing longevity under heavy-duty conditions.
The bearing operates within a temperature range of -30° to 110°C, ensuring stability in diverse environments.
Its standard radial clearance options allow for flexibility in different operational settings.

Engineered for Precision: 644-632D Bearing

644-632D Bearing’s tapered roller design ensures precise load distribution and smooth operation.
The chrome steel components resist deformation, maintaining accuracy even under high stress.
With an ABEC-1 rating, it meets standard precision requirements for industrial use.
Its open seal type allows for easy lubrication, ensuring consistent performance over time.

Application

Industrial Uses of 644-632D Bearing
644-632D Bearing is commonly used in heavy machinery, such as construction equipment and mining vehicles, where its double-row design handles combined radial and thrust loads effectively. The chrome steel construction ensures durability in tough working conditions.

In automotive applications, 644-632D Bearing supports axle systems and wheel hubs, providing reliable performance under high stress. Its inch sizing makes it a preferred choice for North American vehicle manufacturers.

For industrial automation, 644-632D Bearing is ideal for conveyor systems and robotic arms, where precision and load capacity are key. The open seal design allows for easy lubrication and maintenance.

Where Is 644-632D Bearing Used?
644-632D Bearing finds its place in agricultural machinery, such as tractors and harvesters, due to its ability to withstand heavy loads and harsh environments. The tapered roller design ensures smooth operation.

In material handling equipment, 644-632D Bearing is essential for forklifts and cranes, where its dynamic radial load capacity is crucial. The steel cage adds to its longevity and reliability.

Built for Heavy-Duty Use: 644-632D Bearing
644-632D Bearing is a go-to solution for railway applications, particularly in bogies and couplings, where its combined load handling is vital. The standard radial clearance offers flexibility in various setups.

In wind turbines, 644-632D Bearing supports the main shaft, ensuring efficient energy transfer. Its temperature range makes it suitable for both cold and moderately hot climates.

Automotive vs Aerospace: Applications of 644-632D Bearing
In automotive settings, 644-632D Bearing is used in differential systems, offering stability and load distribution. The inch measurements align well with standard automotive parts.

For aerospace ground equipment, 644-632D Bearing is employed in landing gear test rigs, where precision and reliability are non-negotiable. The ABEC-1 rating ensures consistent performance.

Q&A

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