VLU 20 0544

Inner diameter:: 434 mm

Outer diameter:: 648 mm

Width:: 56 mm

Mass:: 31 kg

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Rolling element type : Ball

Measurement system : Metric

Weight : 31 kg

Outer diameter (Da) : 648 mm

Outer diameter centring length (Da ZT-IT8) : 646 mm

Inner diameter (di) : 434 mm

Step diameter inner ring (di ZT-IT8) : 436 mm

Internal diameter on outer ring (Di) : 545.5 mm

External bolt circle diameter (La) : 620 mm

Number of bolt holes at outer ring (na) : 10

Internal bolt circle diameter (Li) : 462 mm

Number of bolt holes at inner ring (ni) : 14

MAX radial load (frictional contact) : 72.5 KN

Axial dynamic capacities : 188 KN

Axial static capacities : 385 KN

Radial dynamic load : 123 KN

Radial static load : 145 KN

Gear type : No Gear

Temperature : -20℃ to +120℃

Seal type : Closed Type

QIBR - VLU 20 0544 Advantages and Applications

VLU 20 0544 , strong anti-overturning ability, small friction coefficient, Inner diameter (di) is 434 mm，Outer diameter (Da) is 648 mm，Weight is 31 kg, suitable for grabbers, graders, dismantler, marine cranes and rotary drilling rigs, etc., is the most widely used bearing in working conditions requiring greater impact force.

QIBR - VLU 20 0544 Characteristics

VLU 20 0544 , less wear and tear, easy installation. VLU 20 0544 , can simultaneously withstand radial load, axial load and overturning moment, suitable for mechanical equipment that withstands high loads.

VLU 20 0544 Slewing Bearing Features and Advantages

Compact design: Compact structure, it can be installed in space-constrained environments, and has a wider range of applications.

High load capacity: It can withstand axial, radial and overturning moments at the same time, suitable for heavy-duty applications.

Superior precision: Maintain high precision during use and reduce errors in equipment operation.

High temperature and wear resistance: Made of high-temperature bearing steel, with good wear resistance and strength.

Application: Widely used in lifting machinery, engineering machinery, transportation machinery, mining machinery, metallurgical machinery, medical equipment, ships, warships, radar, wind power generation and other fields.

QIBR - VLU 20 0544 Slewing Bearing Optimization

Grease replacement: Replace grease with other greases such as SFK, Mobil, Krupp, etc. to optimize the working performance and use conditions of the bearing.

Coating optimization: Provide other coatings such as zinc plating or nickel plating to enhance corrosion resistance and wear resistance and extend its service life in harsh environments.

Process optimization: Optimize the bearing production process, increase the bearing operating temperature range, and improve the bearing accuracy and stability.

More customization: QIBR can optimize the bearing structure design according to customers’ drawings or equipment requirements to meet equipment needs.

QIBR - VLU 20 0544 Slewing support bearing quality control

Dimension measurement: Use a variety of professional high-precision instruments to measure multiple dimensions of the bearing, with the highest accuracy up to 0.01mm.

Rotation accuracy: Use a dial indicator to measure small flaws or deviations on the bearing surface, with a measurement accuracy of up to 0.01mm.

Hardness measurement: Use a Leeb hardness tester to measure the bearing surface hardness, with a measurement accuracy of ±6HLD.

Metallographic analysis: Use a professional metallographic microscope to analyze the internal metallographic structure of the metal.

Geometric tolerance: Use a roundness meter to measure the bearing geometry and relative position.

Noise monitoring: Use a vibration meter to monitor the vibration during operation and obtain noise data.

Features & Benefits

The slewing bearing consists of five essential components: the inner ring, which rotates; the outer ring, which remains stationary; rolling elements that facilitate movement; spacers for even distribution; and seals that protect against contaminants and retain lubrication.

A:Outer Ring

The outer ring has excellent mechanical performance, with high strength and toughness. After quenching and tempering (Q+T), it exhibits fatigue resistance, impact resistance, and excellent low-temperature impact toughness.

B:Inner ring

The inner ring has excellent mechanical performance, with high strength and toughness. After quenching and tempering (Q+T), it exhibits fatigue resistance, impact resistance, and excellent low-temperature impact toughness.

C:Rolling element

Rollers and balls are both types of rolling elements, which are the most crucial components of rotary support bearings and the most commonly used rolling elements in the bearing industry.

D:Spacer

It is located between the outer raceway, inner raceway, and rollers/balls of the bearing. It is a isolator block that serves as a cage.

E:Seal

Its role serves two purposes: Firstly, to prevent the loss of lubricating grease or oil inside the bearing, ensuring proper lubrication. Secondly, to shield the bearing from external dust or harmful gases, thus preventing damage.

F:Grease

To ensure the smooth operation of the bearing, it is necessary to inject lubricating grease or oil between the inner and outer rings of the bearing. The function of lubricating grease or oil is to reduce friction coefficient and wear, minimize bearing heat and friction losses, and enhance bearing lifespan.