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21311 Double Row Spherical Roller Bearing

21311 Double Row Spherical Roller Bearing

The 21311 is a double-row spherical roller bearing with a 55mm bore and 120mm outer diameter, crafted from tough chrome steel. It manages combined loads up to 35745 lbf and operates smoothly at speeds up to 7500 RPM.

Its open design and lubrication groove make maintenance straightforward, while the steel cage ensures durability. The bearing performs reliably in temperatures ranging from -30°C to 200°C.

This model is interchangeable with SKF bearings, offering a dependable replacement option. Suitable for heavy-duty applications like industrial gearboxes or mining equipment where high radial loads are present.

Weighing 1.7kg, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards for safe industrial use.

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Product Parameters

  • Part Number 21311
  • Brand TFL
  • Interchangeable SKF
  • Size 55 x 120 x 29 mm
  • Bore Dia 55 mm
  • Bore Dia Tolerance -0.015mm to 0
  • Outer Dia 120 mm
  • Outer Dia Tolerance -0.015mm to 0
  • Width 29 mm
  • Width Tolerance -0.06mm to 0
  • Shoulder Dia Of Inner Ring 72.7 mm
  • Shoulder/Recess Dia Of Outer Ring 96.2 mm
  • Width Of Lubrication Groove 6 mm
  • Diameter Of Lubrication Hole 3 mm
  • Chamfer Dimension min.2 mm
  • System of Measurement Metric
  • Radial run-out Standard
  • Bearing Type Roller
  • Roller Bearing Type Spherical
  • Bore Type Cylindrical
  • For Load Direction Combined
  • Construction Double Row
  • Seal Type Open
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel
  • Dynamic Radial Load 35745 lbf
  • Static Radial Load 37318 lbf
  • Max Speed 7500 rpm
  • Lubrication Required
  • Temperature Range -30° to 200 °C
  • Radial Clearance CN
  • RoHs Compliant
  • REACH Compliant
  • Weight 1.7 kg
  • Price （US$） 40.68

Features

How Is 21311 Bearing Engineered for Reliability?

21311 Bearing features a double-row spherical roller design, ideal for handling combined loads with ease.
Its chrome steel construction ensures durability, even under high dynamic radial loads up to 35,745 lbf.

The open seal type allows for easy lubrication, maintaining smooth operation in demanding conditions.
With a temperature range of -30° to 200°C, it performs reliably in varied environments.

The steel cage keeps rollers aligned, reducing friction and extending the bearing’s service life.
Its 7,500 rpm max speed makes it suitable for high-performance applications.

Application

Industrial Uses of 21311 Bearing
21311 Bearing is commonly used in heavy machinery like crushers and vibrating screens, where its double-row spherical design handles misalignment and heavy radial loads.
The chrome steel construction ensures durability in harsh environments, making it suitable for mining and construction equipment.

What Makes 21311 Bearing a Preferred Choice?
In automotive applications, 21311 Bearing supports components like differential systems, providing reliable performance under combined loads.
Its metric sizing and high-speed capability make it a versatile option for various vehicle models.

Built for Heavy-Duty Use: 21311 Bearing
For industrial fans and pumps, 21311 Bearing’s spherical rollers reduce friction, ensuring smooth operation even at high speeds.
The open design allows for easy lubrication, extending the bearing’s service life in demanding conditions.

Automotive vs Aerospace: Applications of 21311 Bearing
In automotive systems, 21311 Bearing excels in transmissions and axles, offering stability under heavy loads.
While not typically used in aerospace, its robust design makes it ideal for ground support equipment and heavy-duty vehicles.

Key Fields for 21311 Bearing
21311 Bearing is a reliable choice for paper mills and steel plants, where it withstands high temperatures and continuous operation.
The steel cage and chrome steel rollers provide excellent resistance to wear, ensuring long-term performance in industrial settings.

Q&A

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