+86 15806631151 [email protected]
TFL BEARINGS
REQUEST A QUOTE
387-S-384D TDO (Two-Row Double-Outer Race) (Imperial)

387-S-384D TDO (Two-Row Double-Outer Race) (Imperial)

The 387-S-384D is a double-row tapered roller bearing with a 2.25″ bore and 3.937″ outer diameter, built from sturdy chrome steel. It handles combined loads up to 42,200 lbf and suits applications needing reliable radial and thrust support.

Its open design allows for easy lubrication, while the steel cage ensures durability under heavy use. The bearing operates smoothly in temperatures from -30°C to 110°C, making it versatile for various conditions.

With standard radial clearance and ABEC-1 precision, it’s a practical choice for industrial machinery or vehicle axles. Weighing 3.31 lb, it’s robust yet manageable for its size, and complies with RoHS and REACH standards.

Get A Free Quote
    Description Features Application Q&A Featured Products Our Process

Product Parameters

  • Part Number 387-S-384D
  • Brand TFL
  • Size 2.25" x 3.937" x 0.864"
  • Bore Dia 2.25"
  • 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 2.52"
  • 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 387-S
  • 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 3.31 lb

Features

How Is 387-S-384D Bearing Engineered for Reliability?

387-S-384D Bearing features a double-row tapered roller design, providing strong resistance to combined radial and thrust loads.
Its dynamic radial load capacity reaches 42,200 lbf, ensuring reliable performance in heavy-duty applications.
The chrome steel construction enhances durability, while the steel cage maintains roller alignment for smooth operation.
With a temperature range of -30° to 110°C, it performs consistently in various environments.

What Makes 387-S-384D Bearing Suitable for High-Temperature Applications?

387-S-384D Bearing is built with chrome steel rings and rollers, offering excellent heat resistance up to 110°C.
Its open design allows for effective lubrication, reducing friction and heat buildup during operation.
The double-row construction distributes loads evenly, preventing overheating under heavy use.
This makes it ideal for applications where temperature fluctuations are common.

Designed for Durability: 387-S-384D Bearing

387-S-384D Bearing’s chrome steel components provide long-lasting performance even under high stress.
The tapered roller design ensures efficient load distribution, minimising wear over time.
With a dynamic radial rating of 10,900 lbf for two rows, it handles demanding conditions with ease.
Its standard radial clearance options allow for flexibility in various applications.

Steel vs Ceramic Bearings: Strengths of 387-S-384D Bearing

387-S-384D Bearing uses high-quality chrome steel for both rollers and rings, balancing strength and cost-effectiveness.
This material choice provides excellent load capacity and wear resistance compared to ceramic alternatives.
The steel cage further enhances durability while maintaining precise roller alignment.
It’s a practical solution for industrial applications requiring reliable performance.

Application

Industrial Uses of 387-S-384D Bearing
The 387-S-384D 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.

In automotive applications, 387-S-384D Bearing supports wheel hubs and differential systems, providing reliable performance under varying loads. The inch sizing makes it a preferred choice for North American vehicle models.

For industrial automation, 387-S-384D Bearing’s open design allows for easy lubrication, maintaining smooth operation in conveyor systems and robotic arms. The steel cage adds stability during high-speed rotations.

Where Is 387-S-384D Bearing Used?
You’ll find 387-S-384D Bearing in agricultural machinery, where its tapered roller design manages heavy loads in tractors and harvesters. The standard radial clearance ensures consistent performance in dusty conditions.

The bearing also fits well in material handling systems, such as forklifts and cranes, thanks to its robust construction. Its ABEC-1 rating balances precision and cost-effectiveness for general industrial use.

Built for Heavy-Duty Use: 387-S-384D Bearing
387-S-384D Bearing excels in forestry equipment, handling the rough terrain and heavy loads typical in log splitters and sawmills. The double-row setup distributes stress evenly, extending service life.

In marine applications, this bearing withstands saltwater exposure while supporting propeller shafts and winches. The chrome steel rollers resist corrosion, making it a dependable choice for offshore use.

Automotive vs Aerospace: Applications of 387-S-384D Bearing
In automotive settings, 387-S-384D Bearing is ideal for truck axles, where its combined load capacity handles both weight and movement stresses. The inch measurements align with standard repair parts.

For aerospace ground support, the bearing works well in aircraft tugs and loading equipment. Its temperature range suits outdoor operations, though it’s not rated for in-flight use.

Q&A

SEND INQUIRY