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TS (Single Row Tapered Roller Bearings) (Imperial) 3777-3720

TS (Single Row Tapered Roller Bearings) (Imperial) 3777-3720

The 3777-3720 is a single-row tapered roller bearing with a 1.8125″ bore and 3.6718″ outer diameter, crafted from durable 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 reliable performance. 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 practical replacement option. Ideal for heavy-duty machinery, automotive systems, or industrial equipment where combined loads are common.

Weighing just 2lb, it balances strength and portability. Compliant with RoHS and REACH standards, it meets safety and environmental requirements.

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Product Parameters

  • Part Number 3777-3720
  • Brand TFL
  • Interchangeable Timken
  • Size 1.8125" x 3.6718" x 1.1875"
  • Bore Dia 1.8125"
  • Bore Dia Tolerance +0.005" to 0
  • Outer Dia 3.6718"
  • 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 2.09"
  • Cone Backface Backing Diameter 2.36"
  • Cup Frontface Backing Diameter 3.50"
  • Cup Backface Backing Diameter 3.23"
  • 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 3777
  • Cup Part Number 3720
  • 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 lb

Features

Performance Features of 3777-3720 Bearing

3777-3720 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 27,500 lbf, ensuring reliable performance in heavy-duty applications.
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 3777-3720 Bearing Engineered for Reliability?

3777-3720 Bearing features precise cone and cup dimensions, ensuring smooth operation under combined loads.
The chrome steel construction enhances durability, while the standard radial clearance allows for flexibility.
Its dynamic thrust rating of 4,120 lbf ensures steady performance in demanding conditions.
The open design simplifies lubrication, maintaining efficiency over time.

Designed for Durability: 3777-3720 Bearing

3777-3720 Bearing’s single-row tapered roller design provides excellent load distribution.
The chrome steel rollers and rings resist wear, even under high radial and thrust loads.
With a static radial load capacity of 34,300 lbf, it handles heavy applications with ease.
The steel cage ensures proper roller spacing, reducing friction and noise.

Steel vs Ceramic Bearings: Strengths of 3777-3720 Bearing

3777-3720 Bearing uses chrome steel for both rollers and rings, balancing cost and performance.
This material choice ensures high load capacity and resistance to wear in industrial settings.
The bearing’s ABEC-1 rating guarantees consistent precision for standard applications.
Its open design allows for easy lubrication, maintaining smooth operation over time.

Application

Industrial Uses of 3777-3720 Bearing
The 3777-3720 Bearing is commonly used in heavy machinery like construction equipment and agricultural gear, where its tapered roller design handles combined loads efficiently. Its chrome steel construction ensures durability even in demanding environments.

Where Is 3777-3720 Bearing Used?
You’ll often find the 3777-3720 Bearing in automotive applications, particularly in wheel hubs and differential systems. Its inch sizing makes it a reliable choice for North American vehicle models.

Built for Heavy-Duty Use: 3777-3720 Bearing
The 3777-3720 Bearing excels in industrial fans and pumps, thanks to its robust steel cage and standard radial clearance. Its open design simplifies lubrication and maintenance.

Automotive vs Aerospace: Applications of 3777-3720 Bearing
In automotive settings, the 3777-3720 Bearing supports high-load components like axles, while its precision makes it suitable for certain aerospace landing gear systems. The ABEC-1 rating ensures consistent performance.

Perfect Fit for Automation: 3777-3720 Bearing
The 3777-3720 Bearing works well in conveyor systems and robotic arms, where its tapered rollers manage radial and thrust loads smoothly. Its temperature range suits both indoor and outdoor applications.

Q&A

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