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TS (Single Row Tapered Roller Bearings) (Imperial) 3781A-3726

TS (Single Row Tapered Roller Bearings) (Imperial) 3781A-3726

The 3781A-3726 is a single-row tapered roller bearing with a 1.906″ bore and 3.75″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 27500 lbf radially and 4120 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 from -30°C to 110°C, suitable for demanding environments.

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

Weighing 2.1 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it meets safety and environmental requirements.

The 3781A-3726 features standard radial clearance, with options for C3, C4, or C5 available. Its ABEC-1 rating ensures dependable precision for general industrial use.

With an effective center location of -0.32″, it provides stable performance in aligned setups. The tapered roller design distributes loads evenly, reducing wear over time.

Perfect for applications requiring durability and load versatility, such as conveyor systems or agricultural machinery. Its straightforward design simplifies maintenance and replacement.

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Product Parameters

  • Part Number 3781A-3726
  • Brand TFL
  • Interchangeable Timken
  • Size 1.906" x 3.75" x 1.1875"
  • Bore Dia 1.906"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 3.75"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 1.193"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 0.9375"
  • Cup Width Tolerance +0.002" to -0.01
  • Width 1.1875"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.14"
  • Cup Backface ToClear Radius 0.130"
  • Cone Frontface Backing Diameter 2.17"
  • Cone Backface Backing Diameter 2.44"
  • Cup Frontface Backing Diameter 3.54"
  • Cup Backface Backing Diameter 3.27"
  • Cage Cone Frontface Clearance 0.06"
  • Cage Cone Backface Clearance 0.06"
  • Effective Center Location -0.32"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 3781A
  • Cup Part Number 3726
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Cups Type Standard
  • Series 3700
  • Ring Material Chrome Steel
  • Roller 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 Thrust Rating(90 Million Revolutions)(Ca90) 4120 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 2.1 lb

Features

How Is 3781A-3726 Bearing Engineered for Reliability?

3781A-3726 Bearing features chrome steel rings and rollers, ensuring strength and durability under combined loads.
Its dynamic radial load capacity reaches 27,500 lbf, making it suitable for heavy-duty applications.

The tapered roller design of 3781A-3726 Bearing provides effective load distribution, reducing wear.
With a temperature range of -30° to 110°C, it performs reliably in various operating conditions.

The steel cage maintains roller alignment, contributing to smooth operation and extended service life.
3781A-3726 Bearing’s standard radial clearance offers flexibility for different installation requirements.

Application

Industrial Uses of 3781A-3726 Bearing
3781A-3726 Bearing is commonly used in heavy machinery like construction equipment, where its tapered roller design handles combined loads efficiently. The chrome steel construction ensures durability even in demanding environments.

In automotive applications, 3781A-3726 Bearing fits well in wheel hubs and differential systems, providing reliable performance under varying loads. Its imperial sizing makes it a straightforward replacement for Timken equivalents.

For industrial conveyors, 3781A-3726 Bearing’s open design allows easy lubrication, extending service life in continuous operation. The standard radial clearance offers flexibility for different load conditions.

What Makes 3781A-3726 Bearing a Preferred Choice?
3781A-3726 Bearing stands out in agricultural machinery due to its ability to manage both radial and thrust loads smoothly. The steel cage adds robustness, ideal for dusty or high-vibration settings.

In mining equipment, 3781A-3726 Bearing’s high dynamic load capacity ensures reliability under extreme conditions. Its compatibility with Timken parts simplifies maintenance and sourcing.

Built for Heavy-Duty Use: 3781A-3726 Bearing
3781A-3726 Bearing excels in forestry machinery, where its tapered rollers distribute loads evenly, reducing wear. The ABEC-1 rating balances precision and cost-effectiveness for rugged applications.

For railway axle boxes, 3781A-3726 Bearing’s temperature tolerance (-30° to 110°C) ensures consistent performance. The standard radial clearance adapts well to thermal expansion during long hauls.

Automotive vs Aerospace: Applications of 3781A-3726 Bearing
In trucks and trailers, 3781A-3726 Bearing handles heavy axial and radial loads in wheel assemblies. Its imperial dimensions align with North American vehicle standards.

For ground support equipment in aerospace, 3781A-3726 Bearing’s steel construction resists corrosion from de-icing chemicals. The open design simplifies inspection and relubrication between flights.

Q&A

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