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

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

The 644-632DC 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 works well in temperatures from -30°C to 110°C.

Its open design allows for easy lubrication, while the steel cage ensures durability. The bearing comes in standard radial clearance but is also available in C3, C4, or C5 options for different needs.

This model is ideal for heavy-duty applications like industrial gearboxes or construction equipment where both radial and thrust loads are present. Weighing 12.34 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards.

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Product Parameters

  • Part Number 644-632DC
  • 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 632DC
  • 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 Is 644-632DC Bearing Engineered for Reliability?

644-632DC Bearing features a double-row tapered roller design, providing strong resistance to combined radial and thrust loads.
Its chrome steel construction ensures durability, with a dynamic radial load capacity of 108,000 lbf.

The precision-engineered cage maintains roller alignment, reducing friction and extending service life.
With a standard radial clearance, it offers reliable performance across a temperature range of -30° to 110°C.

Application

Industrial Uses of 644-632DC Bearing
The 644-632DC Bearing is commonly used in heavy machinery, such as construction equipment and mining tools, where its double-row design handles combined radial and thrust loads efficiently. Its chrome steel construction ensures durability in demanding environments.

Where Is 644-632DC Bearing Used?
You’ll often find 644-632DC Bearing in agricultural machinery, like tractors and harvesters, where its robust design supports high loads and rough terrain. The open seal type allows for easy lubrication, extending its service life.

Built for Heavy-Duty Use: 644-632DC Bearing
In industrial gearboxes, 644-632DC Bearing provides reliable performance under continuous operation. Its tapered roller design ensures smooth rotation even under significant stress.

Automotive vs Aerospace: Applications of 644-632DC Bearing
In automotive applications, 644-632DC Bearing is ideal for wheel hubs and differentials, offering stability under varying loads. For aerospace, its precision and strength make it suitable for landing gear systems.

Perfect Fit for Automation: 644-632DC Bearing
The 644-632DC Bearing works well in automated production lines, where its consistent performance reduces downtime. Its standard radial clearance ensures compatibility with various industrial setups.

Q&A

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