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TS (Single Row Tapered Roller Bearings) (Imperial) 644-633

TS (Single Row Tapered Roller Bearings) (Imperial) 644-633

The 644-633 is a single-row tapered roller bearing with a 2.8125″ bore and 5.125″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 62,100 lbf radially and 9,980 lbf thrust, making it versatile for various applications.

Its open design allows easy lubrication, while the steel cage ensures durability. The bearing operates smoothly in temperatures from -30°C to 110°C, suitable for demanding environments.

This model is interchangeable with Timken bearings, offering a reliable replacement option. Ideal for heavy-duty machinery, gearboxes, or industrial equipment where combined loads are common.

Weighing 4.9 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, ensuring safe and eco-friendly use.

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Product Parameters

  • Part Number 644-633
  • Brand TFL
  • Interchangeable Timken
  • Size 2.8125" x 5.125" x 1.625"
  • Bore Dia 2.8125"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 5.125"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 1.625"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 1.25"
  • Cup Width Tolerance +0.002" to -0.01
  • Width 1.625"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.14"
  • Cup Backface ToClear Radius 0.130"
  • Cone Frontface Backing Diameter 3.87"
  • Cone Backface Backing Diameter 3.43"
  • Cup Frontface Backing Diameter 4.89"
  • Cup Backface Backing Diameter 4.57"
  • Cage Cone Frontface Clearance 0.1"
  • Cage Cone Backface Clearance 0.15"
  • Effective Center Location -0.44"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 644
  • Cup Part Number 633
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Cups Type Standard
  • Series 635
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 62100 lbf
  • Static Radial Load 67000 lbf
  • Dynamic Radial Rating(90 Million Revolutions)(C90) 16100 lbf
  • Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 9980 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 4.900 lb

Features

Performance Features of 644-633 Bearing

644-633 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 62,100 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.

How Does 644-633 Bearing Reduce Friction?

644-633 Bearing’s tapered roller design minimises friction, promoting smooth operation under heavy loads.
The precision-engineered chrome steel rollers and cage ensure consistent performance over time.
Its standard radial clearance options allow for optimal fit and reduced wear in different applications.
Regular lubrication further enhances its efficiency and longevity.

Built for Reliability: 644-633 Bearing

644-633 Bearing is designed to handle both radial and thrust loads, making it versatile for industrial use.
The chrome steel construction resists wear, maintaining performance even in demanding conditions.
With a static radial load capacity of 67,000 lbf, it provides dependable support for heavy machinery.
Its ABEC-1 rating ensures consistent precision and reliability.

Steel vs Ceramic Bearings: Strengths of 644-633 Bearing

644-633 Bearing’s chrome steel rollers and rings offer durability and cost-effectiveness compared to ceramic options.
The steel cage provides robust support, ensuring stable operation under combined loads.
Its dynamic thrust rating of 9,980 lbf makes it suitable for applications requiring both radial and axial support.
The standard radial clearance options allow for easy integration into various systems.

Application

Industrial Uses of 644-633 Bearing
The 644-633 Bearing is a solid choice for heavy machinery, especially in construction equipment where combined loads are common. Its tapered roller design handles both radial and thrust forces efficiently, making it reliable for long-term use.

In automotive applications, 644-633 Bearing works well in wheel hubs and differential systems, thanks to its durable chrome steel construction. The imperial sizing ensures compatibility with older or custom-built vehicles, particularly in the US market.

For industrial fans and pumps, 644-633 Bearing’s open design allows for easy lubrication, which helps maintain performance in high-speed operations. The steel cage adds extra strength, reducing wear over time.

Where Is 644-633 Bearing Used?
You’ll often find 644-633 Bearing in agricultural machinery, like tractors and harvesters, where rugged performance is needed. Its ability to handle misalignment makes it a practical fit for uneven terrain.

In conveyor systems, 644-633 Bearing supports heavy loads without compromising smooth movement. The standard radial clearance option ensures it adapts well to varying operational conditions.

Built for Heavy-Duty Use: 644-633 Bearing
The 644-633 Bearing excels in mining equipment, where dust and debris are common. Its open seal type simplifies maintenance, even in harsh environments.

For gearboxes, 644-633 Bearing’s tapered rollers distribute loads evenly, reducing stress on individual components. This design extends the lifespan of both the bearing and the machinery it supports.

Automotive vs Aerospace: Applications of 644-633 Bearing
In automotive settings, 644-633 Bearing is trusted for drivetrain components due to its high static radial load capacity. It’s a go-to for mechanics working on trucks and off-road vehicles.

While not typically used in aerospace, 644-633 Bearing’s precision makes it suitable for ground support equipment. Its reliability under heavy loads ensures smooth operations in demanding conditions.

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