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TS (Single Row Tapered Roller Bearings) (Imperial) 686-674

TS (Single Row Tapered Roller Bearings) (Imperial) 686-674

The 686-674 is a single-row tapered roller bearing with a 3.7392″ bore and 6.75″ outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 59500 lbf radially and 12400 lbf thrust, making it versatile for heavy-duty use.

Its open design allows easy lubrication, while the steel cage ensures durability. The bearing operates smoothly in temperatures from -30°C to 110°C, suitable for various industrial conditions.

This model is interchangeable with Timken bearings, offering a reliable replacement option. Ideal for applications like gearboxes or heavy machinery where combined loads are common.

Weighing 8.4 lb, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, it meets safety and environmental requirements.

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Product Parameters

  • Part Number 686-674
  • Brand TFL
  • Interchangeable Timken
  • Size 3.7392" x 6.75" x 1.594"
  • Bore Dia 3.7392"
  • Bore Dia Tolerance +0.001" to 0
  • Outer Dia 6.75"
  • Outer Dia Tolerance +0.001" to 0
  • Cone Width 1.594"
  • Cone Width Tolerance +0.003" to -0.01
  • Cup Width 1.1875"
  • Cup Width Tolerance +0.002" to -0.01
  • Width 1.594"
  • Width Tolerance +0.008" to 0
  • Cone Backface ToClear Radius 0.14"
  • Cup Backface ToClear Radius 0.130"
  • Cone Frontface Backing Diameter 4.88"
  • Cone Backface Backing Diameter 4.45"
  • Cup Frontface Backing Diameter 6.34"
  • Cup Backface Backing Diameter 5.91"
  • Cage Cone Frontface Clearance 0.12"
  • Cage Cone Backface Clearance 0.14"
  • Effective Center Location -0.08"
  • System of Measurement Inch
  • Type Bearing
  • Cone Part Number 686
  • Cup Part Number 674
  • Bearing Type Roller
  • Roller Bearing Type Tapered
  • For Load Direction Combined
  • Construction Single Row
  • Seal Type Open
  • Cups Type Standard
  • Series 675
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 59500 lbf
  • Static Radial Load 86700 lbf
  • Dynamic Radial Rating(90 Million Revolutions)(C90) 15400 lbf
  • Dynamic Thrust Rating(90 Million Revolutions)(Ca90) 12400 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 8.4 lb

Features

What Makes 686-674 Bearing Suitable for Heavy-Duty Applications?

686-674 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 59,500 lbf, making it ideal for demanding industrial uses.
The steel cage ensures proper roller alignment, reducing friction and enhancing durability.
With a temperature range of -30° to 110°C, it performs reliably in various conditions.

How Is 686-674 Bearing Engineered for Reliability?

686-674 Bearing features precise cone and cup width tolerances, ensuring consistent performance.
The tapered roller design distributes loads evenly, extending the bearing’s service life.
Its standard radial clearance allows for smooth operation in most applications.
Chrome steel construction provides excellent wear resistance and strength.

Built for Durability: 686-674 Bearing

686-674 Bearing’s single-row construction simplifies installation while maintaining robustness.
The open seal type facilitates easy lubrication, keeping maintenance straightforward.
With a static radial load capacity of 86,700 lbf, it handles heavy loads with ease.
Its ABEC-1 rating ensures reliable precision for industrial machinery.

Steel vs Ceramic Bearings: Strengths of 686-674 Bearing

686-674 Bearing uses chrome steel for both rollers and rings, balancing cost and performance.
This material choice provides excellent durability without the higher cost of ceramics.
The bearing’s dynamic thrust rating of 12,400 lbf ensures versatility in various applications.
Its standard lubrication requirement keeps operational costs manageable.

Application

Industrial Uses of 686-674 Bearing
The 686-674 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 in tough working conditions.

In automotive applications, 686-674 Bearing fits well in wheel hubs and differential systems, providing reliable performance under varying loads. The inch sizing makes it a good match for American and British vehicle models.

For industrial conveyor systems, 686-674 Bearing’s open design allows for easy lubrication, extending service life in high-duty cycles. The steel cage adds extra strength to withstand continuous operation.

Why Is 686-674 Bearing Essential in Machinery?
686-674 Bearing plays a key role in mining equipment, where its high dynamic radial load capacity supports heavy-duty operations. The tapered rollers distribute stress evenly, reducing wear over time.

In paper mill machinery, 686-674 Bearing’s standard radial clearance ensures smooth rotation under fluctuating temperatures. Its ABEC-1 rating balances precision and cost-effectiveness for industrial use.

For wind turbine yaw systems, 686-674 Bearing’s combined load handling makes it a practical choice. The chrome steel rollers maintain performance even in harsh outdoor conditions.

Built for Heavy-Duty Use: 686-674 Bearing
686-674 Bearing is ideal for forklift axles, where its 8.4 lb weight provides stability without compromising mobility. The steel cage resists deformation under frequent load changes.

In railway freight cars, 686-674 Bearing’s 6.75″ outer diameter offers ample surface contact for shock absorption. Its temperature range suits both cold storage and desert transport applications.

For hydraulic pump systems, 686-674 Bearing’s -0.08″ effective center location helps maintain alignment during pressure fluctuations. The open design simplifies routine maintenance checks.

Automotive vs Aerospace: Applications of 686-674 Bearing
In truck transmissions, 686-674 Bearing handles high torque with its 86700 lbf static radial load capacity. The inch measurements align with standard replacement parts in commercial vehicles.

For aircraft landing gear components, 686-674 Bearing’s -30° to 110°C range accommodates altitude temperature changes. However, its ABEC-1 rating makes it more suitable for ground support equipment than flight systems.

In marine propulsion units, 686-674 Bearing’s corrosion-resistant steel construction withstands salty environments. The tapered design compensates for slight shaft misalignments common in boat engines.

Q&A

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