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386A-384D TDO (Two-Row Double-Outer Race) (Imperial)

386A-384D TDO (Two-Row Double-Outer Race) (Imperial)

The 386A-384D is a double-row tapered roller bearing with a 1.875″ bore and 3.937″ outer diameter, built from sturdy chrome steel for long-lasting performance. It handles combined loads with a dynamic radial capacity of 42,200 lbf and operates smoothly in temperatures from -30°C to 110°C.

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

This model is ideal for industrial machinery or vehicle axles where high radial and thrust loads are common. Weighing 3.91 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it’s a reliable choice for various applications.

The ABEC-1 rating ensures consistent performance, making it suitable for general precision needs. Its double-row design provides extra stability, perfect for demanding environments.

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Product Parameters

  • Part Number 386A-384D
  • Brand TFL
  • Size 1.875" x 3.937" x 0.864"
  • Bore Dia 1.875"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 3.937"
  • Outer Dia Tolerance +0.001" to 0
  • Double Cup Width 1.6875"
  • Double Cup Width Tolerance +0.003" to -0.01
  • Cone Width 0.864"
  • Cone Width Tolerance +0.002" to -0.01
  • Bearing Width Across Cups 2.0624"
  • Bearing Width Across Cups Tolerance +0.008" to 0
  • Cup Backface ToClear Radius 0.03"
  • Cone Backface Backing Diameter 2.2"
  • Cup Frontface Backing Diameter 3.68"
  • Cage Cone Backface Clearance 0.03"
  • Dynamic Radial Load 42200 lbf
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 386A
  • Cup Part Number 384D
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Double Row
  • Seal Type Open
  • Cups Type Standard
  • Series 385
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Rating(One Row 90 Million Revolutions) 6280 lbf
  • Dynamic Thrust Rating(90 Million Revolutions) 3810 lbf
  • Dynamic Radial Rating(Two Row 90 Million Revolutions) 10900 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 3.91 lb

Features

Built for Reliability: 386A-384D Bearing

386A-384D Bearing features a double-row tapered roller design, providing strong resistance to combined radial and thrust loads.
Its chrome steel construction ensures durability and long service life in demanding applications.
The dynamic radial load capacity reaches 42,200 lbf, making it suitable for heavy-duty machinery.
With a standard radial clearance, it offers reliable performance across various operating conditions.

How Does 386A-384D Bearing Handle Combined Loads?

386A-384D Bearing is engineered with a double-row tapered roller design, efficiently managing both radial and thrust loads.
The chrome steel rollers and rings enhance strength, ensuring consistent performance under stress.
Its dynamic thrust rating of 3,810 lbf per row adds to its versatility in different applications.
The open seal type allows for easy lubrication, maintaining smooth operation over time.

Performance Features of 386A-384D Bearing

386A-384D Bearing’s tapered roller design reduces friction, improving efficiency in high-load scenarios.
The steel cage keeps rollers aligned, minimising wear and extending the bearing’s lifespan.
With a temperature range of -30° to 110°C, it performs reliably in varied environments.
Its ABEC-1 rating ensures precision, making it a dependable choice for industrial use.

Why Choose 386A-384D Bearing for Heavy-Duty Applications?

386A-384D Bearing’s double-row construction provides exceptional load-carrying capacity, ideal for heavy machinery.
The chrome steel materials resist wear, ensuring long-term reliability even under continuous use.
Its standard radial clearance allows for smooth operation, reducing maintenance needs.
The bearing’s design balances strength and efficiency, making it a practical solution for demanding tasks.

Structural Advantages of 386A-384D Bearing

386A-384D Bearing’s double-cup width tolerance ensures precise fitment, enhancing stability during operation.
The tapered rollers distribute loads evenly, reducing stress on individual components.
With a dynamic radial rating of 10,900 lbf for two rows, it handles high-capacity requirements effortlessly.
The open design simplifies lubrication, keeping maintenance straightforward and cost-effective.

Application

Industrial Uses of 386A-384D Bearing
The 386A-384D 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. Its chrome steel construction ensures durability in demanding environments.

Where Is 386A-384D Bearing Used?
You’ll often find the 386A-384D Bearing in agricultural machinery, like tractors and harvesters, where its tapered roller design provides reliable performance under varying loads. The inch sizing makes it a good fit for North American equipment.

Built for Heavy-Duty Use: 386A-384D Bearing
In industrial gearboxes, the 386A-384D Bearing offers stable operation thanks to its standard radial clearance and open design. The steel cage adds strength, making it suitable for high-load applications.

Automotive vs Aerospace: Applications of 386A-384D Bearing
While the 386A-384D Bearing is popular in truck wheel hubs due to its robust construction, it’s also found in some aerospace ground support equipment. Its temperature range and ABEC-1 rating balance performance and cost.

Practical Applications of 386A-384D Bearing
For conveyor systems in warehouses, the 386A-384D Bearing provides smooth rotation under continuous use. The tapered rollers distribute loads evenly, reducing wear over time.

Q&A

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