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TS (Single Row Tapered Roller Bearings) (Imperial) 399-393A

TS (Single Row Tapered Roller Bearings) (Imperial) 399-393A

The 399-393A is a single-row tapered roller bearing with a 2.5591″ bore and 4.4375″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 20600 lbf radially and 3670 lbf thrust, making it versatile for various applications.

Its open design allows easy lubrication, while the steel cage ensures durability under heavy use. 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 industrial machinery or automotive systems where combined loads are common.

Weighing 1.9 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it meets safety and environmental requirements.

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Product Parameters

  • Part Number 399-393A
  • Brand TFL
  • Interchangeable Timken
  • Size 2.5591" x 4.4375" x 0.875"
  • Bore Dia 2.5591"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 4.4375"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 0.866"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 0.625"
  • Cup Width Tolerance +0.002" to -0.01
  • Width 0.875"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.080"
  • Cup Backface ToClear Radius 0.130"
  • Cone Frontface Backing Diameter 3.46"
  • Cone Backface Backing Diameter 2.95"
  • Cup Frontface Backing Diameter 4.15"
  • Cup Backface Backing Diameter 3.94"
  • Cage Cone Frontface Clearance 0.09"
  • Cage Cone Backface Clearance 0.07"
  • Effective Center Location -0.03"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 399
  • Cup Part Number 393A
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Cups Type Standard
  • Series 395
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 20600 lbf
  • Static Radial Load 28100 lbf
  • Dynamic Radial Rating(90 Million Revolutions)(C90) 5340 lbf
  • Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 3670 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 1.900 lb

Features

Performance Features of 399-393A Bearing

399-393A Bearing is constructed with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 20,600 lbf, ensuring reliable performance in demanding conditions.
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 environments.

How Is 399-393A Bearing Engineered for Reliability?

399-393A Bearing features a single-row tapered roller design, optimised for combined load applications.
The chrome steel construction enhances durability, while the standard radial clearance ensures smooth operation.
Its dynamic thrust rating of 3,670 lbf (Ca90) provides consistent performance under stress.
The open seal type allows for easy lubrication, maintaining efficiency over time.

Built for Durability: 399-393A Bearing

399-393A Bearing’s tapered roller design distributes loads evenly, reducing wear on contact surfaces.
The steel cage and chrome steel rollers work together to handle heavy radial and thrust loads.
With an ABEC-1 rating, it balances precision and cost-effectiveness for industrial use.
Its wide temperature range makes it suitable for diverse operating conditions.

Steel vs Ceramic Bearings: Strengths of 399-393A Bearing

399-393A Bearing uses chrome steel for both rings and rollers, ensuring high strength and wear resistance.
Unlike ceramic options, it offers a cost-effective solution without compromising load capacity.
The standard radial clearance and open design simplify maintenance and lubrication.
With a static radial load of 28,100 lbf, it reliably supports heavy machinery.

Application

Industrial Uses of 399-393A Bearing
The 399-393A Bearing is commonly used in heavy machinery like construction equipment, where its tapered roller design handles combined loads effectively. Its chrome steel construction ensures durability even in demanding environments.

Where Is 399-393A Bearing Used?
You’ll often find 399-393A Bearing in automotive applications, particularly in wheel hubs and differential systems. Its inch sizing makes it a good fit for older or custom-built vehicles.

Built for Heavy-Duty Use: 399-393A Bearing
This bearing excels in industrial gearboxes, thanks to its ability to manage both radial and thrust loads. The open design allows for easy lubrication, extending its service life.

Automotive vs Aerospace: Applications of 399-393A Bearing
In automotive settings, 399-393A Bearing supports high-load components like axles, while its precision makes it suitable for certain aerospace applications. The steel cage adds extra strength for rigorous use.

Perfect Fit for Automation: 399-393A Bearing
For automated systems, 399-393A Bearing provides reliable performance in conveyor belts and robotic arms. Its standard radial clearance ensures smooth operation without frequent adjustments.

Q&A

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