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3781 Single Cones (Imperial)
3781 Single Cones (Imperial)

3781 Single Cones (Imperial)

The 3781 single cones are tapered roller bearings designed for combined loads, with a 1.9375-inch bore and made from durable chrome steel. They handle dynamic radial loads up to 27500 lbf and operate smoothly in temperatures from -30°C to 110°C.

Their open design and steel cage ensure easy maintenance and long service life. The bearings come in standard radial clearance, with options for C3, C4, or C5 clearances if needed.

These cones are part of the 3700 series and are interchangeable with Timken models, making them a reliable choice for replacements. Ideal for heavy-duty applications like truck axles or industrial machinery.

Weighing just 0.14kg, they are lightweight yet robust. Compliant with RoHS and REACH standards for safe use.

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Product Parameters

  • Part Number 3781
  • Brand TFL
  • Interchangeable Brand Timken
  • System of Measurement Inch
  • Type Cones
  • Bearing Part Number 3781-3720 , 3781-3720V , 3781-3726 , 3781-3727 , 3781-3730 , 3781-3732 , 3781-3733 , 3781-3735
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Series 3700
  • Bore Dia 1.9375"
  • Bore Dia Tolerance +0.005" to 0
  • Cone Width 1.193"
  • Cone Width Tolerance +0.003" to -0.01
  • Cone Backface ToClear Radius 0.14"
  • Cone Frontface Backing Diameter 2.2"
  • Cone Backface Backing Diameter 2.44"
  • Cage Cone Frontface Clearance 0.06"
  • Cage Cone Backface Clearance 0.06"
  • Effective Center Location -0.32"
  • Ring Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 27500 lbf
  • Static Radial Load 34300 lbf
  • Dynamic Radial Rating(90 Million Revolutions)(C90) 7120 lbf
  • Dynamic Radial Rating(Two Row 1 Million Revolutions)(C1) 47800 lbf
  • Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 4120 lbf
  • Dynamic Radial Rating(Two Row 90 Million Revolutions)(C90) 12400 lbf
  • Temperature Range -30° to 110 °C
  • ABEC Rating ABEC-1
  • Radial Clearance Standard (Available in C3/C4/C5)
  • RoHS Compliant
  • REACH Compliant

Features

How Does 3781 Bearing Handle Combined Loads?

3781 Bearing is crafted from chrome steel, offering strong resistance to both radial and thrust loads.
Its dynamic radial load capacity reaches 27,500 lbf, making it suitable for demanding applications.
The steel cage ensures proper roller alignment, reducing friction and extending operational life.
With a temperature range of -30° to 110°C, it performs reliably in various conditions.

What Ensures Smooth Operation in 3781 Bearing?

3781 Bearing features a tapered roller design, optimised for smooth and efficient performance.
The chrome steel construction enhances durability, while the steel cage maintains roller alignment.
Its dynamic thrust rating of 4,120 lbf ensures reliable operation under combined loads.
The standard radial clearance allows for flexibility in different applications.

Why Choose 3781 Bearing for Heavy-Duty Applications?

3781 Bearing’s single-row construction provides stability and strength under heavy loads.
With a static radial load capacity of 34,300 lbf, it excels in demanding environments.
The chrome steel rings and rollers ensure long-lasting performance and reduced wear.
Its ABEC-1 rating guarantees consistent precision in industrial settings.

Application

Industrial Uses of 3781 Single Cones
The 3781 Single Cones are widely used in heavy machinery, such as construction equipment and mining tools, where combined loads are common. Their tapered roller design ensures smooth operation even under demanding conditions.

In automotive applications, 3781 Single Cones are often found in wheel hubs and differential systems. The inch sizing makes them compatible with many American and British vehicle models.

For industrial conveyor systems, 3781 Single Cones provide reliable performance due to their chrome steel construction. The open seal type allows for easy lubrication, extending their service life in high-use environments.

Where Is 3781 Single Cones Used?
You’ll often spot 3781 Single Cones in agricultural machinery, like tractors and harvesters. Their robust design handles both radial and thrust loads effortlessly.

In railway applications, 3781 Single Cones support axle boxes, ensuring smooth and safe train operations. The steel cage adds durability, making them ideal for long-term use.

Built for Heavy-Duty Use: 3781 Single Cones
The 3781 Single Cones excel in forestry equipment, such as log splitters and sawmills. Their tapered rollers distribute loads evenly, reducing wear over time.

In material handling systems, 3781 Single Cones keep things running smoothly. The standard radial clearance ensures consistent performance across various temperatures.

Automotive vs Aerospace: Applications of 3781 Single Cones
In automotive settings, 3781 Single Cones are trusted for their reliability in transmission systems. The inch measurements simplify replacements in older vehicle models.

For aerospace ground support equipment, 3781 Single Cones offer precision and durability. Their ABEC-1 rating ensures adequate performance for non-critical aerospace applications.

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