RKS.21 0741

Inner diameter:: 634 mm

Outer diameter:: 840 mm

Width:: 56 mm

Mass:: 60 kg

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Rolling element type : Ball

Measurement system : Metric

Raceway diameter (dm) : 741 mm

Outer diameter (D) : 840 mm

Internal diameter on outer ring (D2) : 742.5 mm

Inner diameter (d) : 634 mm

Internal diameter on inner ring (d1) : 698 mm

External diameter on inner ring (d2) : 739.5 mm

External bolt circle diameter (Je) : 785 mm

Bolt hole diameter-outer (Ke) : M12

Number of bolt holes at outer ring (Ne) : 18

Internal bolt circle diameter (Ji) : 662 mm

Bolt hole diameter-inner (Ki) : 18

Number of bolt holes at inner ring (Ni) : 16

Weight : 60 kg

Gear pitch circle diameter : 828 mm

Module : 6 mm

Number of teeth (z) : 138

Normal permissible tooth forces (Tfnormal) : 16 KN

MAX permissible tooth force : 54 KN

Basic dynamic load rating,axial : 211 KN

Static load rating,axial : 524 KN

Gear type : External gear

Temperature : -20℃ to +120℃

Seal type : Closed Type

QIBR - RKS.21 0741 Advantages and Applications

RKS.21 0741 has high positioning accuracy, good rotation performance and smooth operation. Inner diameter (d) is 634 mm，Outer diameter (D) is 840 mm，Weight is 60 kg. It is suitable for solar power generation equipment, earth-moving machinery, excavators, dismantling machines and stackers and reclaimers, etc. It is the most widely used bearing in working conditions requiring high precision.

QIBR - RKS.21 0741 Characteristics

RKS.21 0741 , adapts to harsh environments, has long service life and low production cost. RKS.21 0741 , can bear radial load, axial load and overturning moment at the same time, suitable for mechanical equipment requiring high precision.

RKS.21 0741 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 - RKS.21 0741 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 - RKS.21 0741 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.